The ASAS-SN Catalog of Variable Stars IV: Periodic Variables in the APOGEE Survey

Abstract

We explore the synergy between photometric and spectroscopic surveys by searching for periodic variable stars among the targets observed by the Apache Point Observatory Galactic Evolution Experiment (APOGEE) using photometry from the All-Sky Automated Survey for Supernovae (ASAS-SN). We identified 1924 periodic variables among more than 258000 APOGEE targets; 465 are new discoveries. We homogeneously classified 430 eclipsing and ellipsoidal binaries, 139 classical pulsators (Cepheids, RR Lyrae and delta Scuti), 719 long period variables (pulsating red giants) and 636 rotational variables. The search was performed using both visual inspection and machine learning techniques. The light curves were also modeled with the damped random walk stochastic process. We find that the median [Fe/H] of variable objects is lower by 0.3 dex than that of the overall APOGEE sample. Eclipsing binaries and ellipsoidal variables are shifted to a lower median [Fe/H] by 0.2 dex. Eclipsing binaries and rotational variables exhibit significantly broader spectral lines than the rest of the sample. We make ASAS-SN light curves for all the APOGEE stars publicly available and provide parameters for the variable objects.

accepted to MNRAS

References in corpus (10)

• The All-Sky Automated Survey for Supernovae (ASAS-SN) Light Curve Server v1.0
• The Radial Velocity Experiment (RAVE): first data release
• The GALAH Survey: Scientific Motivation
• An eclipsing binary distance to the Large Magellanic Cloud accurate to 2 per cent
• The Catalina Surveys Periodic Variable Star Catalog
• SDSS-V: Pioneering Panoptic Spectroscopy
• Limitations on the recovery of the true AGN variability parameters using Damped Random Walk modeling
• The EPOCH Project: I. Periodic variable stars in the EROS-2 LMC database
• Orbital and physical parameters of eclipsing binaries from the ASAS catalogue - VIII. The totally-eclipsing double-giant system HD 187669
• The Mysterious Dimmings of the T Tauri Star V1334 Tau

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• High Tide: A Systematic Search for Ellipsoidal Variables in ASAS-SN
• Mass-ratio distribution of contact binary stars
• Cool, Luminous, and Highly Variable Stars in the Magellanic Clouds from ASAS-SN: Implications for Thorne-Żytkow Objects and Super-Asymptotic Giant Branch Stars
• The ASAS-SN Catalog of Variable Stars VIII: "Dipper" Stars in the Lupus Star-Forming Region
• $V$-band photometry of asteroids from ASAS-SN: Finding asteroids with slow spin
• Beyond Gaia: Asteroseismic Distances of M giants using Ground-Based Transient Surveys
• On the dynamical evolution of Cepheids in star clusters
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• Photometric properties and stellar parameters of the rapidly rotating magnetic early-B star HD 345439
• Orbital and stellar parameters for 2M06464003+0109157: a double-lined eclipsing binary of spotted, sub-solar twins
• A photometric study of two contact binaries: CRTS J025408.1+265957 and CRTS J012111.1+272933
• A New Period Determination Method for Periodic Variable Stars
• 200,000+ Deep Learning-inferred Periods of Stellar Variability from the All-Sky Automated Survey for Supernovae
• Decoding the RVb Enigma of DF Cyg: Pulsations, Circumstellar Disks, and Post-RGB Evolution Revealed by Multi-Wavelength Observations
• Evryscope-South Survey of Upper- and Pre-main Sequence Solar Neighborhood Stars
• 2M17091769+3127589: a mass-transfer binary with an extreme mass ratio
• Variable Red Giants Exploration with MASTER Robotic Net: Main Algorithms and Study of Three Mira-type Targets