Studies of luminous stars in nearby galaxies. VII - The brightest blue stars in the spiral galaxies M101 and NGC 2403

Abstract

view Abstract Citations (22) References (7) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Studies of luminous stars in nearby galaxies. VII - The brightest blue stars in the spiral galaxies M101 and NGC 2403 Humphreys, R. M. Abstract The first spectra of individual stars outside our own Local Group of galaxies have been obtained for suspected supergiants in the fields of Ml0l and NGC 2403. Four stars in NGC 2403 and three in Ml0l are confirmed to be members. The visually brightest stars in both galaxies are A-type supergiants, and their spectral characteristics are consistent with the luminosities derived from their membership in M 101 and NGC 2403. The visual luminosities of the A-type supergiants are - 9.4 mag for the one in NGC 2403 and -10.3 mag and -10.1 mag for the two in Ml0l. These two supergiants in M 101 are the visually brightest normal stars yet known in any galaxy. Publication: The Astrophysical Journal Pub Date: October 1980 DOI: 10.1086/158374 Bibcode: 1980ApJ...241..598H Keywords: Spiral Galaxies; Stellar Luminosity; Stellar Spectra; Supergiant Stars; A Stars; H Lines; Line Spectra; Spectrum Analysis; Stellar Magnitude; Stellar Parallax; Astronomy full text sources ADS | data products NED (2) Related Materials (7) Part 1: 1978ApJS...38..309H Part 2: 1979ApJS...39..389H Part 3: 1979ApJ...232..409H Part 4: 1979ApJ...234..854H Part 5: 1980ApJ...238...65H Part 6: 1980ApJ...241..587H Part 8: 1983ApJ...265..176H