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J/AJ/134/594 Araucaria project: Cepheids in WLM galaxy (Pietrzynski+, 2007)
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Beginning of ReadMe :J/AJ/134/594 Araucaria project: Cepheids in WLM galaxy (Pietrzynski+, 2007)
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The Araucaria project: the distance to the Local Group galaxy WLM from Cepheid
variables discovered in a wide-field imaging survey.
Pietrzynski G., Gieren W., Udalski A., Soszynski I., Bresolin F.,
Kudritzki R.-P., Garcia A., Minniti D., Mennickent R., Szewczyk O.,
Szymanski M., Kubiak M., Wyrzykowski L.
<Astron. J., 134, 594-603 (2007)>
=2007AJ....134..594P
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ADC_Keywords: Galaxies, nearby ; Stars, variable ; Photometry, VRI
Keywords: Cepheids - distance scale - galaxies: distances and redshifts -
galaxies: individual (WLM) - galaxies: stellar content
Abstract:
We have conducted an extensive wide-field imaging survey for Cepheid
variables in the Local Group irregular galaxy WLM. From data obtained
on 101 nights, we have discovered 60 Cepheids, which include 14 of the
15 Cepheid variables previously detected by Sandage and Carlson. Our
Cepheid survey in WLM should be practically complete down to a period
of 3-days. Importantly, we have found for the first time a long-period
Cepheid (P=54.2-days) in this galaxy, alleviating the problem that
WLM with its many blue, massive stars does not contain Cepheids with
periods longer than about 10-days.
Description:
All the data presented in this paper were collected with the Warsaw
1.3m telescope at Las Campanas Observatory. The V images of WLM were
secured on 101 different nights between 2001 December and 2003
December. In addition, 24 I-band images were collected in 2003.