The discovery of a debris disc around the DAV white dwarf PG 1541+651
نویسندگان
چکیده
منابع مشابه
On the discovery of an enormous ionized halo around the hot DO white dwarf PG 1034 + 001
Very recently, the discovery of the largest known planetary nebula on the sky surrounding the DO white dwarf PG 1034+001 with an apparent diameter of about 2 • , corresponding to a linear diameter of 3.5-7.0 pc at the likely distance of 100-200 pc, has been reported by Hewett et al. (2003). A careful inspection of available sky survey data has now shown that this planetary nebula, Hewett 1, is ...
متن کاملSDSSJ084539.17+225728.0: the first DBZ white dwarf with a metal-rich gaseous debris disc
We report the discovery of a third white dwarf hosting a gaseous debris disc, SDSS J084539.17+225728.0. The typical double-peaked Ca II 8498,8542,8662Å emission lines can be modelled in terms of a Keplerian gas disc with a radial extent from ∼ 0.5R⊙ to ∼ 1.0R⊙. The effective temperature of SDSS 0845+2257, Teff ≃ 18600 ± 500K, is comparable to the two other white dwarfs with gaseous discs, SDSS ...
متن کاملThe Pulsating Pre { White Dwarf Star PG 0122 + 200
We present an analysis of single{site time{series photometry of the pulsating pre{white dwarf PG 0122+200. We show the pulsations are consistent with a pattern of modes equally spaced in period; both the observed period range and spacing con rm that PG 0122 is a g{mode pulsator. PG 0122 shows a pattern similar to that seen in multi{site observations of PG 2131+066 and PG 1159{035. The measured ...
متن کاملHerschel observations of the debris disc around HIP 92043⋆
Context. Typical debris discs are composed of particles ranging from several micron sized dust grains to km sized asteroidal bodies, and their infrared emission peaks at wavelengths 60–100 μm. Recent Herschel DUNES observations have identified several debris discs around nearby Sun-like stars (F, G and K spectral type) with significant excess emission only at 160 μm. Aims. We observed HIP 92043...
متن کاملVariable emission from a gaseous disc around a metal-polluted white dwarf
We present the discovery of strongly variable emission lines from a gaseous disc around the DA white dwarf SDSS J1617+1620, a star previously found to have an infrared excess indicative of a dusty debris disc formed by the tidal disruption of a rocky planetary body. Time series spectroscopy obtained during the period 2006–2014 has shown the appearance of strong double-peaked Ca II emission line...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society: Letters
سال: 2011
ISSN: 1745-3925
DOI: 10.1111/j.1745-3933.2011.01177.x