SDSS J142625.71+575218.3: A Prototype for A New Class of Variable White Dwarf [PDF]
, 2008 We present the results of a search for pulsations in six of the recently discovered carbon-atmosphere white dwarf ("hot DQ") stars. On the basis of our theoretical calculations, the star SDSS J142625.71 + 575218.3 is the only object expected to pulsate ...
DeGennaro, Steven +5 more
core +1 more source
Characterizing the Chemistry of Planetary Materials Around White Dwarf Stars [PDF]
, 2017 Planetary systems that orbit white dwarf stars can be studied via spectroscopic observations of the stars themselves. Numerous white dwarfs are seen to have accreted mostly rocky minor planets, the remnants of which are present in the stellar ...
B. Zuckerman, Edward D. Young
semanticscholar +1 more source
Pulsations of massive ZZ Ceti stars with carbon/oxygen and oxygen/neon cores [PDF]
, 2004 We explore the adiabatic pulsational properties of massive white dwarf stars with hydrogen-rich envelopes and oxygen/neon and carbon/oxygen cores. To this end, we compute the cooling of massive white dwarf models for both core compositions taking into ...
A. H. Córsico +46 more
core +3 more sources
The potential of asteroseismology for probing the core chemical stratification in white dwarf stars [PDF]
, 2016 Context. The details of the C/O core structure in white dwarf stars has mostly remained inaccessible to the technique of asteroseismology, despite several attempts carried out in the past. Aims.
N. Giammichele +4 more
semanticscholar +1 more source
Searching for benchmark systems containing ultra-cool dwarfs and white dwarfs
EPJ Web of Conferences, 2013 We have used the 2MASS all-sky survey and WISE to look for ultracool dwarfs that are part of multiple systems containing main sequence stars. We cross-matched L dwarf candidates from the surveys with Hipparcos and Gliese stars, finding two new systems ...
Pinfield D.J., Gomes J.I.
doaj +1 more source
Projected rotational velocities of WD1614+136 and WD1353+409 - implications for the rate of galactic Type Ia supernovae [PDF]
, 1998 The white dwarf stars WD1614+136 and WD1353+409 are not sufficiently massive to have formed through single star evolution. However, observations to date have not yet found any evidence for binarity.
Marsh, T. R., Maxted, P. F. L.
core +4 more sources
Constraining planet formation around 6M⊙-8M⊙ stars [PDF]
, 2020 Identifying planets around O-type and B-type stars is inherently difficult; the most massive known planet host has a mass of only about 3M⊙. However, planetary systems which survive the transformation of their host stars into white dwarfs can be detected
Gaensicke, Boris T. +6 more
core +2 more sources
White Dwarf Central Stars [PDF]
Symposium - International Astronomical Union, 1993 Planetary nebula nuclei on lower luminosity, diagonal tracks in the HR Diagrams are degenerate dwarf stars close to their final radii. For several reasons, these stars have until recently been difficult to identify and study. With the advent of new techniques and technologies, both hydrogen–rich and hydrogen–poor atmospheric sequences have been found.
openaire +2 more sources
Barium and related stars, and their white-dwarf companions [PDF]
Astronomy & Astrophysics, 2019 Barium (Ba) dwarfs and CH subgiants are the less evolved analogues of Ba and CH giants. They are F- to G-type main-sequence stars polluted with heavy elements by their binary companions when the companion was on the asymptotic giant branch (AGB).
A. Escorza +14 more
semanticscholar +1 more source
A highly magnetized and rapidly rotating white dwarf as small as the Moon [PDF]
Nature, 2021 White dwarfs represent the last stage of evolution of stars with mass less than about eight times that of the Sun and, like other stars, are often found in binaries1,2. If the orbital period of the binary is short enough, energy losses from gravitational-
I. Caiazzo +17 more
semanticscholar +1 more source