Red Supergiants in M31: The Humphreys-Davidson limit at high metallicity

Abstract

The empirical upper limit to Red Supergiant (RSG) luminosity, known as the Humphreys-Davidson (HD) limit, has been commonly explained as being caused by the stripping of stellar envelopes by metallicity-dependent, line-driven winds. As such, the theoretical expectation is that the HD limit should be higher at lower metallicity, where weaker mass-loss rates mean that higher initial masses are required for an envelope to be stripped. In this paper, we test this prediction by measuring the luminosity function of RSGs in M31 and comparing to those in the LMC and SMC. We find that $\log (L_{\max }/L_{\odot })=5.53\pm 0.03$ in M31 (Z $\gtrsim$ Z${}_{\odot }$), consistent with the limit found for both the LMC (Z $\sim$ 0.5 Z${}_{\odot }$) and SMC (Z $\sim$ 0.25 Z${}_{\odot }$), while the RSG luminosity distributions in these 3 galaxies are consistent to within 1$\sigma$. We therefore find no evidence for a metallicity dependence on both the HD limit and the RSG luminosity function, and conclude that line-driven winds on the main sequence are not the cause of the HD limit.

Accepted for publication in MNRAS, November 2021

References in corpus (17)

• The NumPy array: a structure for efficient numerical computation
• Binary interaction dominates the evolution of massive stars
• Toward Complete Statistics of Massive Binary Stars: Penultimate Results from the Cygnus OB2 Radial Velocity Survey
• A new mass-loss rate prescription for red supergiants
• The wind speeds, dust content, and mass-loss rates of evolved AGB and RSG stars at varying metallicity
• The Initial Masses of the Red Supergiant Progenitors to Type-II Supernovae
• Star Clusters in M31: I. A Catalog and a Study of the Young Clusters
• New predictions for radiation-driven, steady-state mass-loss and wind-momentum from hot, massive stars II. A grid of O-type stars in the Galaxy and the Magellanic Clouds
• An image of the dust sublimation region in the nucleus of NGC 1068
• The `Red Supergiant Problem': the upper luminosity boundary of type-II supernova progenitors
• New predictions for radiation-driven, steady-state mass-loss and wind-momentum from hot, massive stars. I. Method and first results
• The young massive SMC cluster NGC 330 seen by MUSE II. Multiplicity properties of the massive-star population
• The Luminosity Function of Red Supergiants in M31
• The Red Supergiant Content of M31 and M33
• The proper motion of Andromeda from Gaia eDR3: confirming a nearly radial orbit
• Discovery of SiO band emission from Galactic B[e] supergiants
• Spitzer Photometry of ~1 Million Stars in M31 and 15 Other Galaxies

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