output
19922026
Showing 2020 · astro-ph.SRShow all

52 papers · 2 filters

astro-ph.SR2020★ 40 cited

The Red Supergiant Content of M31 and M33

Philip Massey, Kathryn F. Neugent, Emily M. Levesque +2

We identify red supergiants (RSGs) in our spiral neighbors M31 and M33 using near-IR (NIR) photometry complete to a luminosity limit of log L/Lo=4.0. Our archival survey data cover…

astro-ph.SR2020★ 56 cited

On the Use of Field RR Lyrae as Galactic Probes. II. A new S calibration to estimate their metallicity

J. Crestani, M. Fabrizio, V. F. Braga +33

We performed the largest and most homogeneous spectroscopic survey of field RR Lyraes (RRLs). We secured 6,300 high resolution (HR, R35,000) spectra for 143 RRLs (11…

astro-ph.SR2020★ 17 cited

The GALAH+ Survey: A New Library of Observed Stellar Spectra Improves Radial Velocities and Hints at Motions within M67

Tomaž Zwitter, Janez Kos, Sven Buder +25

GALAH+ is a magnitude-limited survey of high resolution stellar spectra obtained by the HERMES spectrograph at the Australian Astronomical Observatory. Its third data release provi…

astro-ph.SR2020★ 18 cited

A "blue ring nebula" surrounding a thousands of years old stellar merger

Keri Hoadley, Christopher Martin, Brian D. Metzger +7

Stellar mergers are a brief-lived but common phase in the evolution of binary star systems. Among the many astrophysical implications of these events include the creation of atypic…

astro-ph.SR2020★ 97 cited

The GALAH survey: effective temperature calibration from the InfraRed Flux Method in the Gaia system

L. Casagrande, J. Lin, A. D. Rains +23

In order to accurately determine stellar properties, knowledge of the effective temperature of stars is vital. We implement Gaia and 2MASS photometry in the InfraRed Flux Method an…

astro-ph.SR2020★ 23 cited

The GALAH survey: Chemical homogeneity of the Orion complex

Janez Kos, Joss Bland-Hawthorn, Sven Buder +17

Due to its proximity, the Orion star forming region is often used as a proxy to study processes related to star formation and to observe young stars in the environment they were bo…