Field #3 of the Palomar-Groningen survey. II. Near-infrared photometry of semiregular variables
- Author(s)
- Mathias Schultheis, Yuen Keong Ng, Josef Hron, Franz Kerschbaum
- Abstract
Near-infrared photometry (JHKL'M) was obtained for 78 semiregular variables (SRVs) in field #3 of the Palomar-Groningen survey (PG3, l = 0°, b = -10°). Together with a sample of Miras in this field a comparison is made with a sample of field SRVs and Miras. The PG3 SRVs form a sequence (period - luminosity & period - colour) with the PG3 Miras, in which the SRVs are the short period extension to the Miras. The field and PG3 Miras follow the same P/(J-K)0 relation, while this is not the case for the field and PG3 SRVs. Both the PG3 SRVs and Miras follow the Sgr I period-luminosity relation adopted from Glass et al. (1995). They are likely pulsating in the fundamental mode and have metallicities spanning the range from intermediate to approximately solar.
- Organisation(s)
- Department of Astrophysics, Department of Mathematics
- External organisation(s)
- Leiden University
- Journal
- Astronomy & Astrophysics
- Volume
- 338
- Pages
- 581-591
- No. of pages
- 11
- ISSN
- 0004-6361
- Publication date
- 1998
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103003 Astronomy
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/field-3-of-the-palomargroningen-survey-ii-nearinfrared-photometry-of-semiregular-variables(0c17d8d3-d2af-4f3d-a878-65c8cc8a9932).html