دورية أكاديمية
Detection and preliminary characterization of polluted white dwarfs from Gaia EDR3 and LAMOST.
| العنوان: | Detection and preliminary characterization of polluted white dwarfs from Gaia EDR3 and LAMOST. |
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| المؤلفون: | Badenas-Agusti, Mariona, Vanderburg, Andrew, Blouin, Simon, Dufour, Patrick, Viaña, Javier, Seager, Sara, Wang, Sharon X |
| المصدر: | Monthly Notices of the Royal Astronomical Society; Jan2024, Vol. 527 Issue 3, p4515-4544, 30p |
| مصطلحات موضوعية: | WHITE dwarf stars, COMPACT objects (Astronomy), AIR pollution, ATMOSPHERIC composition, SPACE telescopes, INSPECTION & review |
| مصطلحات جغرافية: | MONTREAL (Quebec) |
| مستخلص: | We present a catalogue of 62 polluted white dwarfs observed by the 9th Low-Resolution Data Release of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST LRS DR9v1; R ≈1800) and the Early Data Release 3 (EDR3) of the Gaia Mission. Among these stellar remnants, 30 are new discoveries with previously unknown traces of calcium pollution. To generate our catalogue, we used a data base of 4324 unique Gaia EDR3 white dwarf candidates with LAMOST LRS DR9v1 observations, many of which have been spectroscopically confirmed by other telescopes. For these stars, we developed a quantitative method to detect calcium absorption in their spectra between 3900–4000 Å, which we then validated through visual inspection and multiple literature cross-checks. Our catalogue provides the astrometric and photometric properties of the white dwarf candidates, incorporates supplementary data (e.g. Montreal White Dwarf Database, MWDD; PanSTARRS; the Hubble Space Telescope), and indicates the possibility of calcium pollution in their atmospheres. For our final sample of polluted white dwarfs, we also determine the main atmospheric properties of 23 sources with effective temperatures T |
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| قاعدة البيانات: | Complementary Index |
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