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Title: PROPERTIES OF M31. II. A CEPHEID DISK SAMPLE DERIVED FROM THE FIRST YEAR OF PS1 PANDROMEDA DATA

Abstract

We present a sample of Cepheid variable stars toward M31 based on the first year of regular M31 observations of the PS1 survey in the r{sub P1} and i{sub P1} filters. We describe the selection procedure for Cepheid variable stars from the overall variable source sample and develop an automatic classification scheme using Fourier decomposition and the location of the instability strip. We find 1440 fundamental mode (classical {delta}) Cep stars, 126 Cepheids in the first overtone mode, and 147 belonging to the Population II types. Two hundred ninety-six Cepheids could not be assigned to one of these classes and three hundred fifty-four Cepheids were found in other surveys. These 2009 Cepheids constitute the largest Cepheid sample in M31 known so far and the full catalog is presented in this paper. We briefly describe the properties of our sample in its spatial distribution throughout the M31 galaxy, in its age properties, and we derive an apparent period-luminosity relation (PLR) in our two bands. The Population I Cepheids nicely follow the dust pattern of the M31 disk, whereas the 147 Type II Cepheids are distributed throughout the halo of M31. We outline the time evolution of the star formation in themore » major ring found previously and find an age gradient. A comparison of our PLR to previous results indicates a curvature term in the PLR.« less

Authors:
; ; ; ; ; ; ; ;  [1];  [2]; ; ; ; ; ; ;  [3]
  1. University Observatory Munich, Scheinerstrasse 1, D-81679 Munich (Germany)
  2. Graduate Institute of Astronomy, National Central University, Jhongli City 32001, Taiwan (China)
  3. Institute for Astronomy, University of Hawaii at Manoa, Honolulu, HI 96822 (United States)
Publication Date:
OSTI Identifier:
22130793
Resource Type:
Journal Article
Journal Name:
Astronomical Journal (New York, N.Y. Online)
Additional Journal Information:
Journal Volume: 145; Journal Issue: 4; 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; CATALOGS; CEPHEIDS; CLASSIFICATION; DECOMPOSITION; DUSTS; EVOLUTION; FILTERS; GALAXIES; INSTABILITY; LUMINOSITY; SPATIAL DISTRIBUTION

Citation Formats

Kodric, Mihael, Riffeser, Arno, Hopp, Ulrich, Seitz, Stella, Koppenhoefer, Johannes, Bender, Ralf, Goessl, Claus, Snigula, Jan, Lee, Chien-Hsiu, Ngeow, Chow-Choong, Chambers, K. C., Magnier, E. A., Price, P. A., Burgett, W. S., Hodapp, K. W., Kaiser, N., and Kudritzki, R. -P. PROPERTIES OF M31. II. A CEPHEID DISK SAMPLE DERIVED FROM THE FIRST YEAR OF PS1 PANDROMEDA DATA. United States: N. p., 2013. Web. doi:10.1088/0004-6256/145/4/106.
Kodric, Mihael, Riffeser, Arno, Hopp, Ulrich, Seitz, Stella, Koppenhoefer, Johannes, Bender, Ralf, Goessl, Claus, Snigula, Jan, Lee, Chien-Hsiu, Ngeow, Chow-Choong, Chambers, K. C., Magnier, E. A., Price, P. A., Burgett, W. S., Hodapp, K. W., Kaiser, N., & Kudritzki, R. -P. PROPERTIES OF M31. II. A CEPHEID DISK SAMPLE DERIVED FROM THE FIRST YEAR OF PS1 PANDROMEDA DATA. United States. https://doi.org/10.1088/0004-6256/145/4/106
Kodric, Mihael, Riffeser, Arno, Hopp, Ulrich, Seitz, Stella, Koppenhoefer, Johannes, Bender, Ralf, Goessl, Claus, Snigula, Jan, Lee, Chien-Hsiu, Ngeow, Chow-Choong, Chambers, K. C., Magnier, E. A., Price, P. A., Burgett, W. S., Hodapp, K. W., Kaiser, N., and Kudritzki, R. -P. 2013. "PROPERTIES OF M31. II. A CEPHEID DISK SAMPLE DERIVED FROM THE FIRST YEAR OF PS1 PANDROMEDA DATA". United States. https://doi.org/10.1088/0004-6256/145/4/106.
@article{osti_22130793,
title = {PROPERTIES OF M31. II. A CEPHEID DISK SAMPLE DERIVED FROM THE FIRST YEAR OF PS1 PANDROMEDA DATA},
author = {Kodric, Mihael and Riffeser, Arno and Hopp, Ulrich and Seitz, Stella and Koppenhoefer, Johannes and Bender, Ralf and Goessl, Claus and Snigula, Jan and Lee, Chien-Hsiu and Ngeow, Chow-Choong and Chambers, K. C. and Magnier, E. A. and Price, P. A. and Burgett, W. S. and Hodapp, K. W. and Kaiser, N. and Kudritzki, R. -P.},
abstractNote = {We present a sample of Cepheid variable stars toward M31 based on the first year of regular M31 observations of the PS1 survey in the r{sub P1} and i{sub P1} filters. We describe the selection procedure for Cepheid variable stars from the overall variable source sample and develop an automatic classification scheme using Fourier decomposition and the location of the instability strip. We find 1440 fundamental mode (classical {delta}) Cep stars, 126 Cepheids in the first overtone mode, and 147 belonging to the Population II types. Two hundred ninety-six Cepheids could not be assigned to one of these classes and three hundred fifty-four Cepheids were found in other surveys. These 2009 Cepheids constitute the largest Cepheid sample in M31 known so far and the full catalog is presented in this paper. We briefly describe the properties of our sample in its spatial distribution throughout the M31 galaxy, in its age properties, and we derive an apparent period-luminosity relation (PLR) in our two bands. The Population I Cepheids nicely follow the dust pattern of the M31 disk, whereas the 147 Type II Cepheids are distributed throughout the halo of M31. We outline the time evolution of the star formation in the major ring found previously and find an age gradient. A comparison of our PLR to previous results indicates a curvature term in the PLR.},
doi = {10.1088/0004-6256/145/4/106},
url = {https://www.osti.gov/biblio/22130793}, journal = {Astronomical Journal (New York, N.Y. Online)},
issn = {1538-3881},
number = 4,
volume = 145,
place = {United States},
year = {Mon Apr 15 00:00:00 EDT 2013},
month = {Mon Apr 15 00:00:00 EDT 2013}
}