Results 51 to 60 of about 2,034,344 (399)
White Dwarf and Pre-White Dwarf Oscillations [PDF]
International Astronomical Union Colloquium, 1993 AbstractCompact stars that result from extreme mass loss on the asymptotic giant branch and planetary nebula formation are observed to pulsate in a very large surface effective temperature range as they cool to become the classical white dwarfs. The hottest and most luminous of these display periods in excess of 1000 seconds because they are large, but
openaire +1 more source
The Gaia 20 pc white dwarf sample [PDF]
Monthly notices of the Royal Astronomical Society, 2018 Using Gaia DR2 data, we present an up-to-date sample of white dwarfs within 20 pc of the Sun. In total we identified 139 systems in Gaia DR2, nine of which are new detections, with the closest of these located at a distance of 13.05 pc.
M. Hollands +4 more
semanticscholar +1 more source
A New Generation of Cool White Dwarf Atmosphere Models. IV. Revisiting the Spectral Evolution of Cool White Dwarfs [PDF]
Astrophysical Journal, 2019 As a result of competing physical mechanisms, the atmospheric composition of white dwarfs changes throughout their evolution, a process known as spectral evolution.
S. Blouin +3 more
semanticscholar +1 more source
Open Astronomy, 2012 We have analyzed the optical light curve of the symbiotic star V407 Cyg that underwent a classical nova outburst in 2010 March. Being guided by a supersoft X-ray phase observed during days 20-40 after the nova outburst, we are able to reproduce the light
Hachisu I., Kato M.
doaj +1 more source
The white dwarf luminosity function. I. Statistical errors and alternatives [PDF]
, 2006 Over the years, several methods have been proposed to compute galaxy luminosity functions, from the most simple ones -counting sample objects inside a given volume- to very sophisticated ones -like the C- method, the STY method or the Choloniewski method,
Abazajian +59 more
core +3 more sources
Double White Dwarf Merger Products among High-mass White Dwarfs [PDF]
Astrophysical Journal, 2019 Double white dwarf (double-WD) binaries may merge within a Hubble time and produce high-mass WDs. Compared to other high-mass WDs, the double-WD merger products have higher velocity dispersion because they are older.
Sihao 浩 Cheng 程思 +3 more
semanticscholar +1 more source
The Canada–France Imaging Survey: Reconstructing the Milky Way Star Formation History from Its White Dwarf Population [PDF]
Astrophysical Journal, 2019 As the remnants of stars with initial masses ≲8 M⊙, white dwarfs contain valuable information on the formation histories of stellar populations. In this paper, we use deep, high-quality, u-band photometry from the Canada–France Imaging Survey, griz ...
Nicholas J. Fantin +17 more
semanticscholar +1 more source
A Chondritic Solar Neighborhood
The Planetary Science Journal, 2023 A persistent question in exoplanet demographics is whether exoplanetary systems form from similar compositional building blocks to our own. Polluted white dwarf stars offer a unique way to address this question, as they provide measurements of the bulk ...
Isabella L. Trierweiler +2 more
doaj +1 more source
A white dwarf catalogue from Gaia-DR2 and the Virtual Observatory [PDF]
Monthly notices of the Royal Astronomical Society, 2018 We present a catalogue of 73,221 white dwarf candidates extracted from the astrometric and photometric data of the recently published Gaia DR2 catalogue.
F. Jiménez-Esteban +7 more
semanticscholar +1 more source
The WFCAM transit survey and cool white dwarfs
EPJ Web of Conferences, 2013 We present results from our search for cool white dwarfs in the WTS (WFCAM Transit Survey). Repeat observations starting in 2007 allowed to produce deep stacked images in J and measure proper motions.
Pinfield D. +4 more
doaj +1 more source