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Pulsars
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1 2 3 4 5 … 8
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Stars/galaxy News
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72
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106389
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Title: The Parkes multibeam pulsar survey: VI. Discovery and timing of 142 pulsars and a Galactic population analysis
Authors: D. R. Lorimer, A. J. Faulkner, A. G. Lyne, R. N. Manchester, M. Kramer, M. A. McLaughlin, G. Hobbs, A. Possenti, I. H. Stairs, F. Camilo, M. Burgay, N. D'A...
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Alpha Centauri
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1 2 3 4
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Stars/galaxy News
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34
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53093
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[url=http://www.activeboard.com/forum.spark?forumID=58381&subForumID=150705&action=view...
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Miras
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Stars
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6
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12168
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Mira variables pulsate with a period between 80 and 1000 days.
In visual light, the amplitude of the light change is in general between 2.5 and 10 magnitudes.
In infrared the amplitude is significantly smaller. Miras are of spectral type M, S or C, dependent on the ratio between the amount of carb...
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Epsilon Aurigae
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1 2 3 4
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Stars/galaxy News
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32
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17777
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Title: Recent UBVJH Photometry of Epsilon Aurigae Authors: Jeffrey L. Hopkins, Robert E. Stencel Since first observed in the early 1980s, the Hopkins Phoenix Observatory continues its UBV band observations of the long period (27.1 years) eclipsing binary star system epsilon Aurigae. The UBV ob...
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Procyon A
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Stars/galaxy News
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8
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14660
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Title: Oscillations in Procyon A: First results from a multi-site campaign Authors: S Hekker, S Reffert, T R Bedding, H Bruntt, R P Butler, L L Kiss, S J O'Toole, E Kambe, H Ando, H Izumiura, B Sato, M Hartmann, A P Hatzes, T Appourchaux, C Barban, G Berthomieu, F Bouchy, C Catala, R A Garcia, J-C Lebrun, M...
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Polaris system
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1 2
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Astronomy News
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13
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11981
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Astronomers using the Hubble Space Telescope have photographed the close companion to Polaris, known also as the North Star, for the first time.
"Hubble's exceptional pointing capabilities combined with the wonderful performance of its instruments allow scientists to see the...
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Proxima Centauri
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1 2
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Stars/galaxy News
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12
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18428
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Title: The moderate magnetic field on the flare star Proxima Centauri Authors: Ansgar Reiners, Gibor Basri We report moderate magnetic flux of 450G < Bf < 750G (3sigma) on the nearby M5.5 flare star Proxima Centauri. A high resolution UVES spectrum was used to measure magnetic flux from Zeem...
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Asteroseismology
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Astronomy News
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6
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4362
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Title: The Current Status of Asteroseismology Authors: C. Aerts, J. Christensen-Dalsgaard, M. Cunha, D.W.Kurtz Stellar evolution, a fundamental bedrock of modern astrophysics, is driven by the physical processes in stellar interiors. While we understand these processes in general terms, w...
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Aldebaran
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Observations
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4
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4443
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Expand (390kb, 1024 x 768) Aldebaran Date: 2:46 GMT, 07 September, 2007 Exposure: 10 seconds
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G 112-29
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Stars/galaxy News
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0
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3070
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Title: G 112-29 (=NLTT 18149), a Very Wide Companion to GJ 282 AB with a Common Proper Motion, Common Parallax, Common Radial Velocity and Common Age Authors: A. Poveda, C. Allen, R. Costero, J. Echevarria, A. Hernandez-Alcantara We have made a search for common proper motion (CPM) companions to th...
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HD 50844
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Stars/galaxy News
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1
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3076
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Title: HD 50844: the new look of Delta Sct stars from CoRoT space photometry Authors: E. Poretti (INAF-OA Brera), E. Michel (LESIA, Meudon), R. Garrido (IAA, Granada), L. Lefevre (LESIA), L. Mantegazza (INAF-OA Brera), M. Rainer (INAF-OA Brera), E. Rodriguez (IAA), K. Uytterhoeven (INAF-OA Bre...
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Formalhaut
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Videos
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0
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3249
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Formalhaut Click to Play | View Details Fomalhaut ( PsA / Piscis Austrini / Alpha Piscis Austrini) is the brightest star in the constellation Piscis Austrinus and one of the brightest stars in the sky. Fomalhaut can be seen low in the southern sky in the northern hemisphere in the fall/winter. Its nam...
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Neutron stars
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1 2 3
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Stars/galaxy News
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21
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12254
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Discovery by astrophysicists to reveal size of neutron star An international team of astrophysicists, led by Sudip Bhattacharyya from the city-based Tata Institute of Fundamental Research (TIFR), have made a discovery using 'thermonuclear burst' to reveal the true size of Neutron stars. [url...
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VZ Pictoris
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Stars/galaxy News
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3
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9371
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A dim star just 13 light years from Earth was born in a cluster 17,000 light years away. Discovered in 1897, Kapteyn's Star is the 25th nearest star system to our sun, but it is no local, says Elizabeth Wylie-de Boer of Mount Stromlo Observatory in Canberra. The cool star's composition is tricky to stud...
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TX Piscium
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Stars/galaxy News
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2
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3859
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TX Piscium (19 Psc) is a variable carbon star in the constellation Pisces. It is amongst the reddest stars known, with a lovely reddish hue when seen in binoculars. Read more Position(2000): RA 23 46 23.5165, Dec +03 29 12.519
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Altair
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Stars/galaxy News
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6
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5237
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University of Michigan astronomers combined light from four widely separated telescopes to produce the first picture showing surface details on a sun-like star beyond our solar system. The image of the rapidly rotating, hot star Altair is the most detailed stellar picture ever made using an inno...
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Regulus
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Stars/galaxy News
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2
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5987
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Stars are round - that's the received wisdom. But Regulus, the brightest star in the constellation Leo, is shaped like a pumpkin. That's because it is spinning so fast it can barely hold itself together. Now we may know why it whirls so quickly: another star dumped material onto it millions of years ag...
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Pollux
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Stars/galaxy News
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2
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9480
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Title: Discovery of a weak magnetic field in the photosphere of the single giant Pollux Authors: M. Auriere, G.A. Wade, R. Konstantinova-Antova, C. Charbonnel, C. Catala, W. W. Weiss, T. Roudier, P. Petit, J.-F. Donati, E. Alecian, R. Cabanac, S. Van Eck, C.P. Folsom, J. Power Aims: We observe the n...
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Vega
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1 2
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Stars/galaxy News
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11
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18939
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Rapidly Spinning Star Vega has Cool Dark Equator
Strong darkening observed around the equator of Vega suggests that the fifth brightest star in Earth's sky has a huge temperature difference of 4,000 degrees Fahrenheit from its cool equatorial region to its hot poles.
Models of th...
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Mizar
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Stars/galaxy News
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2
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3547
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The ancient eye test for those wishing to join the Roman army was administered using stars in the handle of our modern-day Big Dipper. If you passed, you got a job as an archer. If you failed, you had to serve in another capacity … perhaps as a cook. It’s said that sultans of the past also tested their soldi...
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Fomalhaut
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1 2 3 4
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(Preview)
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Stars/galaxy News
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34
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48604
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New observations from NASA's Hubble Space Telescope (HST) will be presented by astronomers during a media teleconference at 1 p.m. EDT, Wednesday, June 22.
link:
A picture taken by Hubble has provided the most detailed visible-ligh...
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Epsilon Eridani
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1 2
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Stars/galaxy News
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14
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19099
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Title: The corona and upper transition region of epsilon Eridani Authors: J.-U. Ness, C. Jordan We present analyses of observations of epsilon Eridani (K2 V) made with the Low Energy Transmission Grating Spectrometer on Chandra and the Extreme Ultraviolet Explorer, supplemented by observatio...
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Canopus
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Stars/galaxy News
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0
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3055
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The measurement of the diameter of Canopus and the detection of spots on its surface, were carried out by an international team led by Armando Domiciano de Souza, astronomer at the Laboratory Fizeau (CNRS, Université of Nice Sophia-Antipolis, Observatoire of the Coast d' Azure-KNOWLEDGE). The...
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Nearby stars
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Stars/galaxy News
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3
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6850
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Nearby stars from the LSPM-north Proper Motion Catalogue. I. Main Sequence Dwarfs and Giants Within 33 Parsecs of the Sun
Authors: Sebastien Lepine
Comments: 13 pages, accepted for publication in the Astronomical Journal
A list of 4,131 dwarfs, sub gi...
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Beta UMi (Kocab)
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Stars/galaxy News
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0
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3125
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Title: Oscillations in Beta UMi - Observations with SMEI Authors: N. J. Tarrant, W. J. Chaplin, Y. Elsworth, S. A. Spreckley, I. R. Stevens Aims: From observations of the K4III star Beta UMi we attempt to determine whether oscillations or any other form of variability is present. Methods: A high-qu...
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Arcturus
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Stars/galaxy News
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5
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5329
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Title: The limb-darkened Arcturus; Imaging with the IOTA/IONIC interferometer Authors: S. Lacour, S. Meimon, E. Thiebaut, G. Perrin, T. Verhoelst, E. Pedretti, P. A. Schuller, L. Mugnier, J. Monnier, J.P. Berger, X. Haubois, A. Poncelet, G. Le Besnerais, K. Eriksson, R. Millan-Gabet, M. Lacas...
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Capella
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Stars/galaxy News
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3
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9781
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Title: Chandra/HETGS Observations of the Capella System: the Primary as a Dominating X-ray Source
Authors: Kazunori Ishibashi, Daniel Dewey, David P. Huenemoerder, Paola Testa
Using the Chandra/High Energy Transmission Grating Spectrometer (hereafter HETGS) resea...
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Barnard's Star
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Stars/galaxy News
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2
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4399
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Barnard's Star, the second nearest star system to the Sun, spewed a large flare that increased its brightness, say astronomers in the United States. The discovery is a surprise: the star should be sedate, bec...
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Teegarden's Star
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Stars/galaxy News
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1
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3468
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Astronomers have discovered one of the closest stars to our Sun, and they say that more undetected close neighbours may be lurking in our vicinity. The new star was found because its relatively swift motion across the sky was picked up by automated sky surveys. It ranks as the third closest star syste...
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Sirius
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Stars/galaxy News
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8
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22780
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The white dwarf orbiting Sirius started as a blue star with five times the Sun's mass. If this blue star still shone today, Sirius would be so bright it would cast shadows on Earth.
Just 8.6 light-years away, Sirius is already the brightest nighttime star. It is double: a bright A-type main-...
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Rigel
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Stars/galaxy News
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2
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4421
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That is no Moon!
It is the supergiant star, Rigel, emerging from behind Saturn.
This image was captured by the Cassini spaceprobe in orbit around the planet.
The image was taken in visible green light with the Cassini spacecraft narrow-angle camera at a distance of approximately 663,...
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alpha Cassiopeiae
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Stars/galaxy News
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0
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2879
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Title: Is Shedir Variable? Authors: Samuel J. George, Ian R. Stevens, Steven A. Spreckley Before the age of modern photographic and CCD observations alpha Cassiopeiae was labelled as a variable star, though this variability has not been seen with modern instrumentation. We present an analysis o...
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Alpha Geminorum
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Stars/galaxy News
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1
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6325
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Castor ( Gem / Geminorum / Alpha Geminorum) is the second brightest star in the constellation Gemini and one of the brightest stars in the nighttime sky. Although it has the Bayer designation "alpha", it is actually fainter than Beta Geminorum (Pollux). [url=http://en.wikipedia.org...
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Alpha Virginis
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Stars/galaxy News
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3
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6870
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Title: Line-profile variability from tidal flows in Alpha Virginis (Spica) Authors: D.M. Harrington, G. Koenigsberger, E. Moreno, J.R. Kuhn (Version v2) We present the results of high precision, high resolution (R~68000) optical observations of the short-period (4d) eccentric binary syste...
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Algol
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1 2 3 4 5 … 33
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Events
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326
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105042
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Algol, (Beta Persei), in the constellation Perseus is nearly overhead at around 10:30 p.m. local time.
Algol is an eclipsing binary system.
The light from Algol appeared to fade every 68 hours 48 minutes and 56 seconds.
Medieval Arabs were aware of its marked changes in bri...
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Deneb
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Stars
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0
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3084
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Deneb (Alpha Cygni) is the brightest star in the constellation Cygnus and one of the vertices of the Summer Triangle. It is the 19th brightest star in the night sky, with an apparent magnitude of 1.25. A blue-white supergiant, Deneb is also one of the most luminous nearby stars. It is, or has been, know...
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Delta Librae
(
1 2 3 4 5
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Stars
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41
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15951
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Delta Librae is a variable star in the constellation Libra. It has the proper name Zuben Elakribi. Delta Librae is approximately 300 light years from the Earth and belongs to the spectral class B9.5V. It is an eclipsing binary star, with a period of 2.3272 days. Its apparent magnitude varies from 4.4...
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