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The white dwarf binary pathways survey - I. A sample of FGK stars with white dwarf companions
(2016)
The number of spatially unresolved white dwarf plus main-sequence star binaries has increased rapidly in the last decade, jumping from only ˜30 in 2003 to over 3000. However, in the majority of known systems the companion ...
Constraining the neutrino magnetic dipole moment from white dwarf pulsations
(Iop Publishing, 2014-08)
Pulsating white dwarf stars can be used as astrophysical laboratories to constrain the properties of weakly interacting particles. Comparing the cooling rates of these stars with the expected values from theoretical models ...
GW Librae: a unique laboratory for pulsations in an accreting white dwarf
(2016)
Non-radial pulsations have been identified in a number of accreting white dwarfs in cataclysmic variables. These stars offer insight into the excitation of pulsation modes in atmospheres with mixed compositions of hydrogen, ...
The evolution of white dwarfs resulting from helium-enhanced, low-metallicity progenitor stars
(EDP Sciences, 2017-01)
Context. Some globular clusters host multiple stellar populations with different chemical abundance patterns. This is particularly true for ω Centauri, which shows clear evidence of a helium-enriched subpopulation characterized ...
An independent constraint on the secular rate of variation of the gravitational constant from pulsating white dwarfs
(Iop Publishing, 2013-06)
A secular variation of the gravitational constant modifies the structure and evolutionary time scales of white dwarfs. Using an state-of-the-art stellar evolutionary code and an up-to-date pulsational code we compute the ...
The double-layered chemical structure in DB white dwarfs
(EDP Sciences, 2004-04)
which is characterized by a pure helium envelope atop an intermediate remnant shell rich in helium, carbon and oxygen, is expected for pulsating DB white dwarfs, assuming that they are descendants of hydrogen-deficient PG ...
Short-period g-mode pulsations in low-mass white dwarfs triggered by H-shell burning
(Iop Publishing, 2014-09)
The detection of pulsations in white dwarfs with low mass offers the possibility of probing their internal structures through asteroseismology and placing constraints on the binary evolutionary processes involved in ...
White dwarf constraints on a varying G
(Istituto Nazionale di Astrofisica, 2014-01)
A secular variation of G modifies the structure and evolutionary time scales of white dwarfs. Using an state-of-the-art stellar evolutionary code, an up-to-date pulsational code, and a detailed population synthesis code ...
Faint blue objects in the hubble deep field-south revealed: White dwarfs, subdwarfs, and quasars
(Institute of Physics Publishing, 2005)
We explore the nature of the faint blue objects in the Hubble Deep Field-South. We have derived proper motions for the point sources in the Hubble Deep Field-South using a 3 yr baseline. Combining our proper-motion ...