Luminous and Variable Stars in NGC 2403 and M81
arXiv:1811.06559 · doi:10.3847/1538-3881/aaf1ac
Abstract
We present the results of spectroscopy and multi-wavelength photometry of luminous and variable star candidates in the nearby spiral galaxies NGC 2403 and M81. We discuss specific classes of stars, the Luminous Blue Variables (LBVs), B[e] supergiants (sgB[e]), and the high luminosity yellow hypergiants. We identify two new LBV candidates, and three sgB[e] stars in M81. We also find that some stars previously considered LBV candidates are actually field stars. The confirmed and candidate LBVs and sgB[e] stars together with the other confirmed members are shown on the HR Diagrams for their respective galaxies. We also present the HR Diagrams for the two "SN impostors", V37 (SN2002kg) and V12(SN1954J) in NGC 2403 and the stars in their immediate environments.
arXiv commentTo appear in the Astronomical Journal
References in corpus (17)
- Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant
- Grids of stellar models with rotation - I. Models from 0.8 to 120 Msun at solar metallicity (Z = 0.014)
- A new calibration of stellar parameters of Galactic O stars
- Hectospec, the MMT's 300 Optical Fiber-Fed Spectrograph
- A Survey About Nothing: Monitoring a Million Supergiants for Failed Supernovae
- Luminous Blue Variables are Antisocial: Their Isolation Implies that they are Kicked Mass Gainers in Binary Evolution
- The Search for Failed Supernovae with The Large Binocular Telescope: First Candidates
- Quantitative Spectroscopy of Blue Supergiant Stars in the Disk of M81: Metallicity, Metallicity Gradient and Distance
- On the Social Traits of Luminous Blue Variables
- Luminous and Variable Stars in M31 and M33. I. The Warm Hypergiants and Post-Red Supergiant Evolution
- Luminous and Variable Stars in M31 and M33. IV. Luminous Blue Variables, Candidate LBVs, and the B[e] Supergiants; How to Tell Them Apart
- Luminous and Variable Stars in M31 and M33. III. The Yellow and Red Supergiants and Post-Red Supergiant Evolution
- Spectroscopic survey of emission-line stars. I. B[e] stars
- Discovery of the first B[e] supergiants in M 31
- Luminous and Variable Stars in M31 and M33 V. The Upper HR Diagram
- A Tale of Two Impostors: SN2002kg and SN1954J in NGC 2403
- The Massive Star Population in M101. III. Spectra and Photometry of the Luminous and Variable Stars
Cited by in corpus (12)
- The metallicity and distance of NGC 2403 from blue supergiants
- Radio Analysis of SN 2004C Reveals an Unusual CSM Density Profile as a Harbinger of Core Collapse
- Candidate LBV stars in galaxy NGC 7793 found via HST photometry + MUSE spectroscopy
- The study of unclassified B[e] stars and candidates in the Galaxy and Magellanic Clouds
- Investigating episodic mass loss in evolved massive stars: I. Spectroscopy of dusty massive stars in ten southern galaxies
- New luminous blue variable candidates in the NGC 247 galaxy
- Wolf-Rayet stars in M81 using GTC/OSIRIS: 7 new detections, analysis and classification of the full sample
- Search for LBVs in the Local Volume galaxies: study of two stars in NGC 1156
- Search for LBVs in the Local Volume galaxies: study of four stars in NGC 4449
- The Complex Upper HR Diagram
- A machine-learning photometric classifier for massive stars in nearby galaxies II. The catalog
- New Blue and Red Variable Stars in NGC 247