The period-luminosity relation of red supergiants with Gaia DR2

Abstract

We revisit the K -band period-luminosity (P-L) relations of Galactic red supergiants using Gaia Data Release 2 parallaxes and up to 70 yr of photometry from AAVSO and ASAS campaigns. In addition, we examine 206 LMC red supergiants using 50 yr of photometric data from the Digitised Harvard Astronomical Plate Collection. We identified periods by computing power spectra and calculated the period-luminosity relations of our samples and compared them with the literature. Newly available data tighten the P-L relations substantially. Identified periods form two groups: one with periods of 300-1000 days, corresponding to pulsations, and another with Long Secondary Periods between 1000 and 8000 days. Among the 48 Galactic objects we find shorter periods in 25 stars and long secondary periods in 23 stars. In the LMC sample we identify 85 and 94 red supergiants with shorter and long secondary periods, respectively. The P-L relation of the Galactic red supergiants is in agreement with the red supergiants in both, the Large Magellanic Cloud and the Andromeda Galaxy. We and no clear continuity between the known red giant period-luminosity sequences, and the red supergiant sequences investigated here.

Resubmitted with the supplementary material. Acknowledgements section and affiliations have been updated

References in corpus (11)

• The Gaia mission
• A distance to the Large Magellanic Cloud that is precise to one per cent
• The Effective Temperatures and Physical Properties of Magellanic Cloud Red Supergiants: The Effects of Metallicity
• Variability in red supergiant stars: pulsations, long secondary periods and convection noise
• The impact of mass-loss on the evolution and pre-supernova properties of red supergiants
• The Period-Luminosity Relation of Red Supergiant Stars in the Small Magellanic Cloud
• Red Supergiant Stars in the Large Magellanic Cloud: I. The Period-Luminosity Relation
• Ellipsoidal Variability and Long Secondary Periods in MACHO Red Giant Stars
• The LMC's Top 250: Classification of the Most Luminous Compact 8 micron Sources in the Large Magellanic Cloud
• The Period-Luminosity Relations of Red Supergiants in M33 and M31
• The Light Curve Shapes as a Key to Resolving the Origin of Long Secondary Periods in Red Giant Stars

Cited by in corpus (25)

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• Evolved Massive Stars at Low-metallicity V. Mass-Loss Rate of Red Supergiant Stars in the Small Magellanic Cloud
• Spatially Resolved Ultraviolet Spectroscopy of the Great Dimming of Betelgeuse
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• Red Supergiants in M31 and M33 I. The Complete Sample
• The Sample of Red Supergiants in Twelve Low-Mass Galaxies of the Local Group
• Evolved Massive Stars at Low-metallicity II. Red Supergiant Stars in the Small Magellanic Cloud
• The Optical to Infrared Extinction Law of Magellanic Clouds Based on Red Supergiant and Classical Cepheid
• Multiplicity among the cool supergiants in the Magellanic Clouds
• Analysis of photometric and spectroscopic variability of red supergiant Betelgeuse
• Long Term Evolution of Surface Features on the Red Supergiant AZ Cyg
• Identification of late-type stars of class I
• One Year of SN 2023ixf: Breaking Through the Degenerate Parameter Space in Light-Curve Models with Pulsating Progenitors
• Episodic mass loss in the very luminous red supergiant [W60] B90 in the Large Magellanic Cloud
• The Great Dimming of Betelgeuse: the photosphere as revealed by tomography over the past 15 years
• The Interstellar Medium toward the Galactic Center Source 2MASS J17470898-2829561
• ANDICAM I and J band monitoring of bright inner Galactic late-type stars
• Searching for Galactic Red Supergiants with Gaia RVS Spectra
• Red Supergiants in the Milky Way and Nearby Galaxies
• The variability of Betelgeuse explained by surface convection
• Stellar evolution through the Red Supergiant phase
• Explosions of pulsating red supergiants: a natural pathway for the diversity of Type II-P/L supernovae