Exploració per tema "Stars--Luminosity function"
Ara es mostren els items 2-9 de 9
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DA white dwarfs from the LSS-GAC survey DR1: the preliminary luminosity and mass functions and formation rate
(2015-06-11)
Article
Accés obertModern large-scale surveys have allowed the identification of large numbers of white dwarfs. However, these surveys are subject to complicated target selection algorithms, which make it almost impossible to quantify to ... -
Effects of Ne-22 sedimentation and metallicity on the local 40 pc white dwarf luminosity function
(EDP Sciences, 2019-08-06)
Article
Accés obertWe analyzed the effect of the sedimentation of 22Ne on the local white dwarf luminosity function by studying scenarios under different Galactic metallicity models. Methods. We use an advanced population synthesis code based ... -
Random Forest identification of the thin disc, thick disc, and halo Gaia-DR2 white dwarf population
(Oxford University Press, 2019-03-13)
Article
Accés obertGaia-DR2 has provided an unprecedented number of white dwarf candidates of ourGalaxy. In particular, it is estimated thatGaia-DR2 has observed nearly 400 000 ofthese objects and close to 18 000 up to 100 pc from the Sun. ... -
Revisiting the luminosity function of single halo white dwarfs
(EDP Sciences, 2015-09-01)
Article
Accés obertContext. White dwarfs are the fossils left by the evolution of low- and intermediate-mass stars, and have very long evolutionary timescales. This allows us to use them to explore the properties of old populations, like the ... -
Testing the initial-final mass relationship of white dwarfs
(2009-06-01)
Article
Accés restringit per política de l'editorialIn this contribution we revisit the initial-final mass relationship of white dwarfs, which links the mass of a white dwarf with that of its progenitor in the main-sequence. Although this function is of paramount importance ... -
The effects of metallicity on the Galactic disk population of white dwarfs
(2014-06)
Article
Accés obertContext. It has been known for a long time that stellar metallicity plays a significant role in the determination of the ages of the different Galactic stellar populations, when main sequence evolutionary tracks are employed. ... -
The mass function of hydrogen-rich white dwarfs: robust observational evidence for a distinctive high-mass excess near 1 M-circle dot
(2015-09-11)
Article
Accés obertThe mass function of hydrogen-rich atmosphere white dwarfs has been frequently found to reveal a distinctive high-mass excess near 1 M-circle dot. However, a significant excess of massive white dwarfs has not been detected ... -
The white dwarf cooling sequence of NGC 6791: an unique tool for stellar astrophysics
(2011)
Article
Accés obertContext. NGC 6791 is a well-studied, metal-rich open cluster that is so close to us that it can be imaged down to luminosities fainter than that of the termination of its white-dwarf cooling sequence, thus allowing for ...