skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: THE MASSIVE STAR POPULATION IN M101. III. SPECTRA AND PHOTOMETRY OF THE LUMINOUS AND VARIABLE STARS

Abstract

We discuss moderate-resolution spectra, multicolor photometry, and light curves of 31 of the most luminous stars and variables in the giant spiral M101. The majority are intermediate A- to F-type supergiants. We present new photometry and light curves for three known “irregular blue variables,” V2, V4, and V9, and identify a new candidate. Their spectra and variability confirm that they are luminous blue variable (LBV) candidates and V9 may be in an LBV-like maximum light state or eruption.

Authors:
;  [1];  [2]
  1. Minnesota Institute for Astrophysics, 116 Church Street SE, University of Minnesota , Minneapolis, MN 55455 (United States)
  2. Department of Astronomy, The Ohio State University, 140 West 18th Avenue, Columbus, OH 43210 (United States)
Publication Date:
OSTI Identifier:
22520235
Resource Type:
Journal Article
Journal Name:
Astronomical Journal (Online)
Additional Journal Information:
Journal Volume: 149; Journal Issue: 5; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1538-3881
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABSORPTION SPECTRA; ABSORPTION SPECTROSCOPY; DIAGRAMS; GALAXIES; GIANT STARS; PHOTOMETRY; RESOLUTION; VARIABLE STARS; VISIBLE RADIATION

Citation Formats

Grammer, Skyler H., Humphreys, Roberta M., and Gerke, Jill, E-mail: grammer@astro.umn.edu, E-mail: roberta@umn.edu. THE MASSIVE STAR POPULATION IN M101. III. SPECTRA AND PHOTOMETRY OF THE LUMINOUS AND VARIABLE STARS. United States: N. p., 2015. Web. doi:10.1088/0004-6256/149/5/152.
Grammer, Skyler H., Humphreys, Roberta M., & Gerke, Jill, E-mail: grammer@astro.umn.edu, E-mail: roberta@umn.edu. THE MASSIVE STAR POPULATION IN M101. III. SPECTRA AND PHOTOMETRY OF THE LUMINOUS AND VARIABLE STARS. United States. doi:10.1088/0004-6256/149/5/152.
Grammer, Skyler H., Humphreys, Roberta M., and Gerke, Jill, E-mail: grammer@astro.umn.edu, E-mail: roberta@umn.edu. Fri . "THE MASSIVE STAR POPULATION IN M101. III. SPECTRA AND PHOTOMETRY OF THE LUMINOUS AND VARIABLE STARS". United States. doi:10.1088/0004-6256/149/5/152.
@article{osti_22520235,
title = {THE MASSIVE STAR POPULATION IN M101. III. SPECTRA AND PHOTOMETRY OF THE LUMINOUS AND VARIABLE STARS},
author = {Grammer, Skyler H. and Humphreys, Roberta M. and Gerke, Jill, E-mail: grammer@astro.umn.edu, E-mail: roberta@umn.edu},
abstractNote = {We discuss moderate-resolution spectra, multicolor photometry, and light curves of 31 of the most luminous stars and variables in the giant spiral M101. The majority are intermediate A- to F-type supergiants. We present new photometry and light curves for three known “irregular blue variables,” V2, V4, and V9, and identify a new candidate. Their spectra and variability confirm that they are luminous blue variable (LBV) candidates and V9 may be in an LBV-like maximum light state or eruption.},
doi = {10.1088/0004-6256/149/5/152},
journal = {Astronomical Journal (Online)},
issn = {1538-3881},
number = 5,
volume = 149,
place = {United States},
year = {2015},
month = {5}
}