Gaia white dwarfs within 40 pc – III. Spectroscopic observations of new candidates in the Southern hemisphere

• DOI: 10.1093/mnras/stac3303
• Publication Date: 2022-11-13T03:58:49Z
• Authors: Mairi W O’Brien; P-E Tremblay; N P Gentile Fusillo; M A Hollands; B T Gänsicke; D Koester; I Pelisoli; E Cukanovaite; T Cunningham; A E Doyle; A Elms; J Farihi; J J Hermes; J Holberg; S Jordan; B L Klein; S J Kleinman; C J Manser; D De Martino; T R Marsh; J McCleery; C Melis; A Nitta; S G Parsons; R Raddi; A Rebassa-Mansergas; M R Schreiber; R Silvotti; D Steeghs; O Toloza; S Toonen; S Torres; A J Weinberger; B Zuckerman
• Keywords: Stars: statistics; Astrophysics - Solar and Stellar Astrophysics; solar neighbourhood; White dwarfs; FOS: Physical sciences; Solar neighbourhood; stars: statistics; Solar and Stellar Astrophysics (astro-ph.SR); white dwarfs

We present a spectroscopic survey of 248 white dwarf candidates within 40 pc the Sun; these 244 are in southern hemisphere. Observations were performed mostly with Very Large Telescope (X-Shooter) and Southern Astrophysical Research Telescope. Almost all selected from $\textit{Gaia}$ Data Release 3 (DR3). find total 246 confirmed dwarfs, 209 which had no previously published spectra, two main-sequence star contaminants. Of these, 100 dwarfs display hydrogen Balmer lines, 69 have featureless show only neutral helium lines. Additionally, 14 traces carbon, while 37 other elements that heavier than helium. observe 36 magnetic through detection Zeeman splitting their or metal spectral High completeness (> 97 per cent) has now been reached, such we 1058 DR3 out 1083 Sun at declinations.