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L Dwarfs
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Stars/galaxy News
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0
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1497
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Title: Discovery of Two Nearby, Peculiar L Dwarfs from the 2MASS Proper Motion Survey: Young or Metal-Rich? Authors: Dagny L. Looper (1), J. Davy Kirkpatrick (2), Roc M. Cutri (2), Travis Barman (3), Adam J. Burgasser (4), Michael C. Cushing (1,5), Thomas Roellig (6), Mark R. McGovern (7),...
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Brown Dwarfs
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1 2 3 4 5 … 8
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Stars/galaxy News
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71
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44414
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After decades of searching, astronomers discovered the first definite brown dwarf only ten years ago. Now, a new analysis of Hubble Space Telescope data implies our Galaxy has almost as many of these failed stars as it does normal stars like the Sun.
The Sun and most other stars power themselves by...
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White Dwarfs
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1 2 3 4 5
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Stars/galaxy News
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47
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33552
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Title: A Catalogue of Spectroscopically Confirmed White Dwarfs from the Sloan Digital Sky Survey Data Release 4
Authors: Daniel J. Eisenstein, James Liebert, Hugh C. Harris, S.J. Kleinmann, Atsuko Nitta, Nicole Silvestri, Scott A. Anderson, J.C. Barentine, Howard J. Brewin...
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UltraCool White Dwarf
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1 2
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Stars/galaxy News
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12
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11704
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COMBO-17 J114356.08-0144032
Christian Wolf of the University of Oxford has discovered a rare Ultra-cool white dwarf.
Only seven of these ultra cool white dwarfs, with surface temperatures below 4,000 kelvins, were known to exist before.
Regular white dwarfs are dead star...
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White / Red Dwarf Systems
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Stars/galaxy News
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4
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4666
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Title: White Dwarf - Red Dwarf Systems Resolved with the Hubble Space Telescope: I. First Results
Authors: J. Farihi, D.W. Hoard, S. Wachter
First results are presented for a Hubble Space Telescope Advanced Camera for Surveys snapshot study of white dwarfs with likely red d...
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carbon-dominated white dwarf stars
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1 2
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Stars/galaxy News
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11
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11011
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Astronomers have discovered white dwarf stars with pure carbon atmospheres. These stars possibly evolved in a sequence astronomers didn't know before. They may have evolved from stars that are not quite massive enough to explode as supernovae but are just on the borderline. All but the most massi...
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Red Dwarfs
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1 2
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Stars/galaxy News
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11
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7325
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Title: Identification of New M Dwarfs in the Solar Neighbourhood
Authors: Basmah Riaz, John E. Gizis, James Harvin
Researchers present the results from a spectroscopic study of 1080 nearby active M dwarfs, selected by correlating the 2MASS and ROSAT catalogues. They have...
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Two TW Hydrae Association Brown Dwarfs
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Stars/galaxy News
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5
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5206
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Title: Spitzer Observations of two TW Hydrae Association Brown Dwarfs
Authors: Basmah Riaz, John E. Gizis, Abraham Hmiel
Researchers present Spitzer Space Telescope observations of two TW Hydrae Association brown dwarfs, 2MASSW J1207334-393254 and 2MASSW J1139511-3...
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T dwarfs
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1 2
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Stars/galaxy News
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12
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8018
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Title: Two T dwarfs from the UKIDSS Early Data Release Authors: T. R. Kendall, M. Tamura, C. G. Tinney, E. L. Martin, M. Ishii, D. J. Pinfield, P. W. Lucas, H. R. A. Jones, S. K. Leggett, S. Dye, P. C. Hewett, F. Allard, I. Baraffe, D. Barrado y Navascues, G. Carraro, S. L. Casewell, G. Chabrier, R. J. Chapp...
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Hot DB White Dwarfs
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Stars/galaxy News
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3
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3241
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Title: Hot DB White Dwarfs from the Sloan Digital Sky Survey
Authors: Daniel J. Eisenstein, James Liebert, Detlev Koester, S.J. Kleinmann, Atsuko Nitta, Paul S. Smith, J.C. Barentine, Howard J. Brewington, J. Brinkmann, Michael Harvanek, Jurek Krzesinski, Eric H. Neilsen Jr...
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White Dwarf GD 362
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Stars/galaxy News
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7
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4462
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Astronomers have glimpsed dusty debris around an essentially dead star where gravity and radiation should have long ago removed any sign of dust. The discovery might provide insights into our own solar system’s eventual demise several billion years from now.
Solar systems may continue to exis...
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Orange dwarfs
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Stars/galaxy News
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0
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1647
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The universe's best real estate for life may be around stars a little less massive than the sun, called orange dwarfs, according to a new analysis. These stars live much longer than sun-like stars, and have safer habitable zones - where liquid water can exist - than those of lighter red dwarf stars. St...
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Helium-core white dwarfs
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Stars/galaxy News
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2
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1927
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Twenty-four unusual stars, 18 of them newly discovered, have been observed in new Hubble telescope images. The stars are white dwarfs, a common type of dead star, but they are odd because they are made of helium rather than the usual carbon and oxygen. This is the first extensive sequence of helium-c...
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Brown Dwarf LS-RCr A1
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Stars/galaxy News
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0
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1775
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Title: Uncovering the Outflow Driven by the Brown Dwarf LS-RCr A1: H-alpha as a Tracer of Outflow Activity in Brown Dwarfs Authors: E.T. Whelan, T.P. Ray, F. Bacciotti It is now apparent that classical T Tauri-like outflows commonly accompany the formation of young brown dwarfs. To date two optica...
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Kelu-1
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Stars/galaxy News
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2
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4686
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Title: Kelu-1 is a Binary L Dwarf: First Brown Dwarf Science from Laser Guide
Star Adaptive Optics
Authors: Michael C. Liu (IfA/Hawaii), Sandy K. Leggett (UKIRT/JAC)
Researchers have presented near-IR imaging of the nearby L2 dwarf Kelu-1 obtained with the Keck...
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Dwarf Nova Systems
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Stars/galaxy News
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0
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1762
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Title: A Far Ultraviolet Archival Study of Cataclysmic Variables: I. FUSE and HST/STIS Spectra of the Exposed White Dwarf in Dwarf Nova Systems Authors: P. Godon, E.M. Sion, P.E. Barrett, I. Hubeny, A.P. Linnell, P. Szkody We present a synthetic spectral analysis of Far Ultraviolet Spectroscopi...
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M subdwarf binaries
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Stars/galaxy News
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0
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1587
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Title: HST search for M subdwarf binaries Authors: Basmah Riaz, John E. Gizis, Debasmita Samaddar We present HST/ACS observations of 19 nearby M subdwarfs in a search for binary systems. Other than the wide common proper motion pair LHS 2140/2139, none of our sdM and esdM targets are found to be bina...
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Late-M Dwarfs
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Stars
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0
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1379
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Title: Studying the Physical Diversity of Late-M Dwarfs with Dynamical Masses Authors: Trent Dupuy, Michael Liu, Brendan Bowler, Michael Cushing, Christiane Helling, Soeren Witte, Peter Hauschildt We present a systematic study of the physical properties of late-M dwarfs based on high-quali...
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Y dwarfs
(Preview)
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Stars/galaxy News
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3
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2038
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NASA's Wise Mission Discovers Coolest Class of Stars Scientists using data from NASA's Wide-field Infrared Survey Explorer (WISE) have discovered the coldest class of star-like bodies, with temperatures as cool as the human body. Astronomers hunted these dark orbs, termed Y dwarfs, for more th...
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Ultracool Dwarfs
(Preview)
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Stars
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2
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2275
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Title: Maximum Reduced Proper Motion Method: Detection of New Nearby Ultracool Dwarfs Authors: N. Phan-Bao (HCMIU, Vietnam National University) In this paper, we describe how to use the Maximum Reduced Proper Motion method (Phan-Bao et al. 2003) to detect 57 nearby L and late-M dwarfs (d_phot &l...
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WISEP J1541-225
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Stars
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0
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1451
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It looks like we have a new neighbour. It's actually been there all along, but astronomers have only now spotted what could be the seventh closest star system to the sun. The system is just nine light years away, a mere stone's throw in astronomical terms. It took so long to find because it's an extremel...
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WISEP J182831.08+265037.8
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Stars
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1
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1532
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The Coldest Brown Dwarf Catalogued as WISE 1828+2650, this brown dwarf lies within 40 light-years of the Sun and is currently the coldest brown dwarf known. Brown dwarfs are roughly the size of the planet Jupiter. WISE 1828+2650, assigned to spectral class Y, has the estimated temperature of a war...
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WISEP J180026.60+013453.1
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Stars
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0
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1431
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Title: WISEP J180026.60+013453.1: A Nearby Late L Dwarf Near the Galactic Plane Authors: John E. Gizis, Adam J. Burgasser, Jacqueline K. Faherty, Philip J. Castro, Michael M. Shara We report a nearby L7.5 dwarf discovered using the Preliminary Data Release of the Wide-field Infrared Survey Expl...
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