The Araucaria Project: the Local Group Galaxy WLM--Distance and metallicity from quantitative spectroscopy of blue Supergiants

Abstract

The quantitative analysis of low resolution spectra of A and B supergiants is used to determine a distance modulus of 24.99 +/- 0.10 mag (995 +/- 46 Kpc) to the Local Group galaxy WLM. The analysis yields stellar effective temperatures and gravities, which provide a distance through the Flux weighted Gravity--Luminosity Relationship (FGLR). Our distance is 0.07 mag larger than the most recent results based on Cepheids and the tip of the RGB. This difference is within the 1-sigma overlap of the typical uncertainties quoted in these photometric investigations. In addition, non-LTE spectral synthesis of the rich metal line spectra (mostly iron, chromium and titanium) of the A supergiants is carried out, which allows the determination of stellar metallicities. An average metallicity of -0.87 +/- 0.06 dex with respect to solar metallicity is found.

arXiv comment46 pages, 14 figures (2 low resolution color figures). Accepted for publication by ApJ

References in corpus (19)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• Line formation in solar granulation: IV. [O I], OI and OH lines and the photospheric O abundance
• Stellar evolution with rotation XI: Wolf-Rayet star populations at different metallicities
• Stellar evolution with rotation X: Wolf-Rayet star populations at solar metallicity
• Stellar evolution with rotation VII: Low metallicity models and the blue to red supergiant ratio in the SMC
• Tip of the Red Giant Branch Distances. II. Zero-Point Calibration
• The VLT-FLAMES survey of massive stars: atmospheric parameters and rotational velocity distributions for B-type stars in the Magellanic Clouds
• Quantitative Spectroscopy of 24 A supergiants in the Sculptor galaxy NGC 300: Flux weighted gravity luminosity relationship, metallicity and metallicity gradient
• A Survey of Local Group Galaxies Currently Forming Stars: II. UBVRI Photometry of Stars in Seven Dwarfs and a Comparison of the Entire Sample
• Quantitative Spectroscopy of BA-type Supergiants
• A new extragalactic distance determination method using the flux-weighted gravity of late B and early A supergiants
• The Araucaria Project. VLT spectra of blue supergiants in WLM: classification and first abundances
• {HST Studies of the WLM Galaxy. II. The Star Formation History from Field Stars
• Investigating The Possible Anomaly Between Nebular and Stellar Oxygen Abundances in the Dwarf Irregular Galaxy WLM
• The Chemical Composition of Two Supergiants in the Dwarf Irregular Galaxy WLM
• Characteristics and classification of A-type supergiants in the Small Magellanic Cloud
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• A High-Resolution Study of the HI Content of Local Group Dwarf Irregular Galaxy WLM
• The Araucaria Project. The Distance to the Local Group Galaxy WLM from Cepheid Variables discovered in a Wide-Field Imaging Survey

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