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Deriving stellar atmospheric parameters and chemical abundances from stellar spectra is crucial for understanding the evolution of the Milky Way. By performing a fitting with MARCS model atmospheric theoretical synthetic spectra combined…

Solar and Stellar Astrophysics · Physics 2023-06-28 Rui Wang , A-Li Luo , Shuo Zhang , Yuan-Sen Ting , Teaghan O'Briain , LAMOST MRS Collaboration

A collection of Johnson/Cousins photometry for stars with known [Fe/H] is used to generate color-color relations that include the abundance dependence. Literature temperature and bolometric correction dependences are attached to the color…

Astrophysics · Physics 2011-01-27 G. Worthey , H. -c. Lee

The International Astronomical Union 2015 Resolution B2 (IAU2015GARB2) has resolved the long-standing problem of zero-point constants for the absolute and apparent bolometric magnitude scales and opened a new window in fundamental…

Solar and Stellar Astrophysics · Physics 2026-05-13 Zeki Eker , Gökhan Yücel

Combining the precise parallaxes and optical photometry delivered by Gaia's second data release (Gaia DR2) with the photometric catalogues of PanSTARRS-1, 2MASS, and AllWISE, we derive Bayesian stellar parameters, distances, and extinctions…

The Asteroid Terrestrial-impact Last Alert System (ATLAS) observes most of the sky every night in search of dangerous asteroids. Its data are also used to search for photometric variability, where sensitivity to variability is limited by…

Instrumentation and Methods for Astrophysics · Physics 2018-11-14 J. L. Tonry , L. Denneau , H. Flewelling , A. N. Heinze , C. A. Onken , S. J. Smartt , B. Stalder , H. J. Weiland , C. Wolf

Through synthetic observations of a hydrodynamical simulation of an evolving star-forming region, we assess how the choice of observational techniques affects the measurements of properties which trace star formation. Testing and…

Solar and Stellar Astrophysics · Physics 2017-11-01 Christine M. Koepferl , Thomas P. Robitaille , James E. Dale , Francesco Biscani

We perform an extensive test of theoretical stellar models for main-sequence stars in ugriz, using cluster fiducial sequences obtained in the previous paper of this series. We generate a set of isochrones using the Yale Rotating…

Stars with accurate and precise effective temperature (T$_{\rm eff}$) measurements are needed to test stellar atmosphere models and calibrate empirical methods to determine T$_{\rm eff}$. There are few standard stars currently available to…

Solar and Stellar Astrophysics · Physics 2020-08-14 N. J. Miller , P. F. L. Maxted , B. Smalley

Stars appearing in CCD images obtained over 224 nights during the course of 69 observing runs have been calibrated to the Johnson/Kron-Cousins BVRI photometric system defined by the equatorial standards of Landolt (1992, AJ, 104, 340). More…

Astrophysics · Physics 2009-10-31 Peter B. Stetson

Asteroseismology has become widely accepted as a benchmark for accurate and precise fundamental stellar properties. It can therefore be used to validate and calibrate stellar parameters derived from other approaches. Meanwhile, one can…

Solar and Stellar Astrophysics · Physics 2023-02-08 Jie Yu , Shourya Khanna , Nathalie Themessl , Saskia Hekker , Guillaume Dréau , Laurent Gizon , Shaolan Bi

Context. As increasingly more spectroscopic data are being delivered by medium- and high-resolving power multi-object spectrographs, more automatic stellar parameter determination softwares are being developed. The quality of the spectra…

Solar and Stellar Astrophysics · Physics 2012-09-04 Helene Posbic , David Katz , Elisabetta Caffau , Piercarlo Bonifacio , Ana Gomez , Luca Sbordone , Frederic Arenou

We investigate the effects of potential sources of systematic error on the angular and photometric redshift, z_phot, distributions of a sample of redshift 0.4 < z < 0.7 massive galaxies whose selection matches that of the Baryon Oscillation…

The luminosities of protostars provide one of the only indirect methods of measuring their masses and mass accretion rates in their earliest stages of evolution. Accurate measurements of protostellar luminosities traditionally requires…

Solar and Stellar Astrophysics · Physics 2026-04-14 Michael M. Dunham , Aina Palau , Nuria Huélamo , Eduard I. Vorobyov , Zach Yek , Sean Rand

We present a catalogue of 362 million stellar parameters, distances, and extinctions derived from Gaia's early third data release (EDR3) cross-matched with the photometric catalogues of Pan-STARRS1, SkyMapper, 2MASS, and AllWISE. The higher…

Temperature and luminosity are the two key diagnostics of a star, yet these cannot come directly from survey data, but must be imputed by comparing those data to models. SED fitting offers a high-precision method to obtain both parameters…

Solar and Stellar Astrophysics · Physics 2026-01-08 I. McDonald , A. A. Zijlstra , N. J. Cox , J. Bernard-Salas

Optimised population synthesis provides an empirical method to extract the relative mix of stellar evolutionary stages and the distribution of atmospheric parameters within unresolved stellar systems, yet a robust validation of this method…

Astrophysics of Galaxies · Physics 2015-06-19 Christopher Barber , Stephane Courteau , Joel Roediger , Ricardo Schiavon

Solar-like oscillations have been observed by Kepler and CoRoT in many solar-type stars, thereby providing a way to probe the stars using asteroseismology. We provide the mode linewidths and mode heights of the oscillations of various stars…

We present a comprehensive re-analysis of stellar photometric variability in the field of the open cluster M37 following the application of a new photometry and de-trending method to MMT/Megacam image archive. This new analysis allows a…

Solar and Stellar Astrophysics · Physics 2015-05-19 S. -W. Chang , Y. -I. Byun , J. D. Hartman