Exploració per tema "Stars--Luminosity function"
Ara es mostren els items 4-9 de 9
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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 ...