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Title: TESTING MASS LOSS IN LARGE MAGELLANIC CLOUD CEPHEIDS USING INFRARED AND OPTICAL OBSERVATIONS. II. PREDICTIONS AND TESTS OF THE OGLE-III FUNDAMENTAL-MODE CEPHEIDS

Abstract

In this paper, we test the hypothesis that Cepheids have infrared excesses due to mass loss. We fit a model using the mass-loss rate and the stellar radius as free parameters to optical observations from the OGLE-III survey and infrared observations from the Two Micron All Sky Survey and SAGE data sets. The sample of Cepheids has predicted minimum mass-loss rates ranging from 0 to 10{sup -8} M{sub sun} yr{sup -1}, where the rates depend on the chosen dust properties. We use the predicted radii to compute the period-radius relation for LMC Cepheids and to estimate the uncertainty caused by the presence of infrared excess for determining angular diameters with the infrared surface brightness technique. Finally, we calculate the linear and nonlinear period-luminosity (P-L) relations for the LMC Cepheids at VIJHK + IRAC wavelengths and find that the P-L relations are consistent with being nonlinear at infrared wavelengths contrary to previous results.

Authors:
 [1];  [2];  [3]
  1. Argelander Institute for Astronomy, University of Bonn, Auf dem Huegel 71, 53121 Bonn (Germany)
  2. Graduate Institute of Astronomy, National Central University, Jhongli City 32001, Taiwan (China)
  3. State University of New York at Oswego, Oswego, NY 13126 (United States)
Publication Date:
OSTI Identifier:
21452934
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 716; Journal Issue: 2; Other Information: DOI: 10.1088/0004-637X/716/2/1136; Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BRIGHTNESS; CEPHEIDS; LUMINOSITY; MAGELLANIC CLOUDS; WAVELENGTHS; GALAXIES; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; PULSATING VARIABLE STARS; STARS; VARIABLE STARS

Citation Formats

Neilson, Hilding R, Ngeow, Chow-Choong, Kanbur, Shashi M, and Lester, John B., E-mail: hneilson@astro.uni-bonn.d. TESTING MASS LOSS IN LARGE MAGELLANIC CLOUD CEPHEIDS USING INFRARED AND OPTICAL OBSERVATIONS. II. PREDICTIONS AND TESTS OF THE OGLE-III FUNDAMENTAL-MODE CEPHEIDS. United States: N. p., 2010. Web. doi:10.1088/0004-637X/716/2/1136.
Neilson, Hilding R, Ngeow, Chow-Choong, Kanbur, Shashi M, & Lester, John B., E-mail: hneilson@astro.uni-bonn.d. TESTING MASS LOSS IN LARGE MAGELLANIC CLOUD CEPHEIDS USING INFRARED AND OPTICAL OBSERVATIONS. II. PREDICTIONS AND TESTS OF THE OGLE-III FUNDAMENTAL-MODE CEPHEIDS. United States. https://doi.org/10.1088/0004-637X/716/2/1136
Neilson, Hilding R, Ngeow, Chow-Choong, Kanbur, Shashi M, and Lester, John B., E-mail: hneilson@astro.uni-bonn.d. 2010. "TESTING MASS LOSS IN LARGE MAGELLANIC CLOUD CEPHEIDS USING INFRARED AND OPTICAL OBSERVATIONS. II. PREDICTIONS AND TESTS OF THE OGLE-III FUNDAMENTAL-MODE CEPHEIDS". United States. https://doi.org/10.1088/0004-637X/716/2/1136.
@article{osti_21452934,
title = {TESTING MASS LOSS IN LARGE MAGELLANIC CLOUD CEPHEIDS USING INFRARED AND OPTICAL OBSERVATIONS. II. PREDICTIONS AND TESTS OF THE OGLE-III FUNDAMENTAL-MODE CEPHEIDS},
author = {Neilson, Hilding R and Ngeow, Chow-Choong and Kanbur, Shashi M and Lester, John B., E-mail: hneilson@astro.uni-bonn.d},
abstractNote = {In this paper, we test the hypothesis that Cepheids have infrared excesses due to mass loss. We fit a model using the mass-loss rate and the stellar radius as free parameters to optical observations from the OGLE-III survey and infrared observations from the Two Micron All Sky Survey and SAGE data sets. The sample of Cepheids has predicted minimum mass-loss rates ranging from 0 to 10{sup -8} M{sub sun} yr{sup -1}, where the rates depend on the chosen dust properties. We use the predicted radii to compute the period-radius relation for LMC Cepheids and to estimate the uncertainty caused by the presence of infrared excess for determining angular diameters with the infrared surface brightness technique. Finally, we calculate the linear and nonlinear period-luminosity (P-L) relations for the LMC Cepheids at VIJHK + IRAC wavelengths and find that the P-L relations are consistent with being nonlinear at infrared wavelengths contrary to previous results.},
doi = {10.1088/0004-637X/716/2/1136},
url = {https://www.osti.gov/biblio/21452934}, journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 716,
place = {United States},
year = {Sun Jun 20 00:00:00 EDT 2010},
month = {Sun Jun 20 00:00:00 EDT 2010}
}