Zobrazeno 1 - 10
of 2 084
pro vyhledávání: '"VICKERS, JOHN"'
We calculate the ages, orbits and phase-space coordinates for a sample of $\sim$4 million LAMOST and Gaia stars. The ages are crossmatched and compared with values from two other popular age catalogs which derive the ages using different methods. Of
Externí odkaz:
http://arxiv.org/abs/2109.09250
We collect a sample of stars observed both in LAMOST and Gaia which have colors implying a temperature hotter than 7000 K. We train a machine learning algorithm on LAMOST spectroscopic data which has been tagged with stellar classifications and metal
Externí odkaz:
http://arxiv.org/abs/2102.09183
Autor:
Vickers, John J., Smith, Martin C.
In this paper we investigate how the chemical and kinematic properties of stars vary as a function of age. Using data from a variety of photometric, astrometric and spectroscopic surveys, we calculate the ages, phase space information and orbits for
Externí odkaz:
http://arxiv.org/abs/1805.02332
Autor:
Bell, Hazel
Publikováno v:
Journal of Scholarly Publishing. Jan2001, Vol. 32 Issue 2, p113. 6p.
Autor:
Armstrong, Mark1 (AUTHOR), Vickers, John2 (AUTHOR)
Publikováno v:
Journal of Political Economy. Oct2023, Vol. 131 Issue 10, p2645-2665. 21p.
Autor:
Vickers, John
Publikováno v:
In International Journal of Industrial Organization December 2021 79
In this paper we notice that extragalactic sources seem to have non-zero proper motions in the PPMXL proper motion catalog. We collect a large, all-sky sample of extragalactic objects and fit their reported PPMXL proper motions to an ensemble of sphe
Externí odkaz:
http://arxiv.org/abs/1602.08868
Using LAMOST spectroscopic data, we find a strong signal of a comoving group of stars in the constellation of Draco. The group, observed near the apocenter of its orbit, is 2.6 kpc from the Sun with a metallicity of -0.64 dex. The system is observed
Externí odkaz:
http://arxiv.org/abs/1512.05090