An LTE effective temperature scale for red supergiants in the Magellanic clouds

Abstract

We present a self-consistent study of cool supergiants (CSGs) belonging to the Magellanic clouds. We calculated stellar atmospheric parameters using LTE KURUCZ and MARCS atmospheric models for more than 400 individual targets by fitting a careful selection of weak metallic lines. We explore the existence of a T eff scale and its implications in two different metallicity environments (each Magellanic cloud). Critical and in-depth tests have been performed to assess the reliability of our stellar parameters (i.e. internal error budget, NLTE systematics). In addition, several Montercarlo tests have been carried out to infer the significance of the Teff scale found. Our findingspoint towards a unique Teff scale that seems to be independent of the environment.

arXiv commentAccepted for publication in MNRAS

References in corpus (32)

• A grid of MARCS model atmospheres for late-type stars I. Methods and general properties
• Grids of stellar models with rotation - I. Models from 0.8 to 120 Msun at solar metallicity (Z = 0.014)
• Rotating Massive Main-Sequence Stars I: Grids of Evolutionary Models and Isochrones
• The Effective Temperature Scale of Galactic Red Supergiants: Cool, But Not As Cool As We Thought
• Grids of stellar models with rotation - III. Models from 0.8 to 120 Msun at a metallicity Z = 0.002
• A UBVR CCD Survey of the Magellanic Clouds
• New ATLAS9 And MARCS Model Atmosphere Grids for the Apache Point Observatory Galactic Evolution Experiment (APOGEE)
• The Araucaria Project. The distance to the Small Magellanic Cloud from late-type eclipsing binaries
• The Effective Temperatures and Physical Properties of Magellanic Cloud Red Supergiants: The Effects of Metallicity
• The Evolution of Massive Stars. I. Red Supergiants in the Magellanic Clouds
• The temperatures of Red Supergiants
• Automated derivation of stellar atmospheric parameters and chemical abundances: the MATISSE algorithm
• Red Supergiant Stars as Cosmic Abundance Probes: II. NLTE Effects in J-band Silicon Lines
• Lithium and zirconium abundances in massive Galactic O-rich AGB stars
• The Yellow and Red Supergiants of M33
• Late-Type Red Supergiants: Too Cool for the Magellanic Clouds?
• The evolution of Red Supergiants to supernova in the LMC cluster NGC 2100
• The Large Magellanic Cloud and the Distance Scale
• Red Supergiant Stars as Cosmic Abundance Probes: KMOS Observations in NGC 6822
• Geometry of giant star model atmospheres: A consistency test
• Red Supergiant Stars as Cosmic Abundance Probes: NLTE Effects in J-band Iron and Titanium Lines
• Red Supergiant Stars as Cosmic Abundance Probes. III. NLTE effects in J-band Magnesium lines
• Red Supergiants as Cosmic Abundance Probes: The Magellanic Clouds
• The potential of Red Supergiants as extra-galactic abundance probes at low spectral resolution
• Fundamental stellar parameters and metallicities from Bayesian spectroscopy. Application to low- and high-resolution spectra
• Chemically tagging the Hyades Supercluster: A homogeneous sample of F6-K4 kinematically selected northern stars
• A new survey of cool supergiants in the Magellanic Clouds
• Red Supergiants as Cosmic Abundance Probes: The Sculptor Galaxy NGC 300
• Prospects for Measuring Abundances of >20 Elements with Low-resolution Stellar Spectra
• Spectral Types of Red Supergiants in NGC 6822 and the Wolf-Lundmark-Melotte Galaxy
• Quantitative Spectroscopic J-band Study of Red Supergiants in Perseus OB-1
• Chemistry and Kinematics of Red Supergiant Stars in the Young Massive Cluster NGC 2100

Cited by in corpus (41)

• Atmospheric Rossiter-McLaughlin effect and transmission spectroscopy of WASP-121b with ESPRESSO
• The luminosities of cool supergiants in the Magellanic Clouds, and the Humphreys-Davidson limit revisited
• The CARMENES search for exoplanets around M dwarfs. Stellar atmospheric parameters of target stars with SteParSyn
• Warm terrestrial planet with half the mass of Venus transiting a nearby star
• Massive donors in interacting binaries: effect of metallicity
• The surface abundances of Red Supergiants at core-collapse
• SteParSyn: A Bayesian code to infer stellar atmospheric parameters using spectral synthesis
• The VLT-FLAMES Tarantula Survey. XXX. Red stragglers in the clusters Hodge 301 and SL 639
• The excess of cool supergiants from contemporary stellar evolution models defies the metallicity-independent Humphreys-Davidson limit
• StePar: an automatic code to infer stellar atmospheric parameters
• A dearth of young and bright massive stars in the Small Magellanic Cloud
• Multiplicity of the red supergiant population in the young massive cluster NGC 330
• Evolved Massive Stars at Low-metallicity II. Red Supergiant Stars in the Small Magellanic Cloud
• The CARMENES search for exoplanets around M dwarfs: Not-so-fine hyperfine-split vanadium lines in cool star spectra
• Effective temperatures of red supergiants estimated from line-depth ratios of iron lines in the YJ bands, 0.97--1.32 micron
• A comprehensive study of NGC 2345, a young open cluster with a low metallicity
• Three open clusters containing Cepheids: NGC 6649, NGC 6664 and Berkeley 55
• New infrared spectral indices of luminous cold stars: from early K to M-types
• ESPRESSO Mass determination of TOI-263b: An extreme inhabitant of the brown dwarf desert
• HD22496b: the first ESPRESSO standalone planet discovery
• Multiplicity among the cool supergiants in the Magellanic Clouds
• Stellar atmospheric parameters of FGK-type stars from high-resolution optical and near-infrared CARMENES spectra
• An atlas of cool supergiants from the Magellanic Clouds and typical interlopers. A guide for the classification of luminous red stars
• Physical parameters of red supergiants in dwarf irregular galaxies in the Local Group
• Berkeley 51, a young open cluster with four yellow supergiants
• NGC 3105: a young open cluster with low metallicity
• Red supergiant stars in binary systems. I. Identification and characterisation in the Small Magellanic Cloud from the UVIT ultraviolet imaging survey
• Red Supergiants in the JWST Era. I: Near-IR Photometric Diagnostics
• Properties of luminous red supergiant stars in the Magellanic Clouds
• New Cepheid variables in the young open clusters Berkeley 51 and Berkeley 55
• Episodic mass loss in the very luminous red supergiant [W60] B90 in the Large Magellanic Cloud
• Investigating episodic mass loss in evolved massive stars: II. Physical properties of red supergiants at subsolar metallicity
• The temperatures of red supergiants in low metallicity environments
• Investigating the metallicity dependence of the mass-loss rate relation of red supergiants
• Red supergiant stars in IC 1613 and metallicity-dependent mixing length in the evolutionary model
• A massive open cluster hiding in full sight
• Spectral analysis of the barium central star of the planetary nebula Hen 2-39
• On the nature of VX Sagitarii: Is it a TZO, a RSG or a high-mass AGB star?
• The extreme scarcity of dust-enshrouded red supergiants: consequences for producing stripped stars via winds
• Metallicities in M dwarfs: Investigating different determination techniques
• Quantifying Systematic Age Discrepancies in Very Young Star Clusters