Field #3 of the Palomar-Groningen survey. II. Near-infrared photometry of semiregular variables

Autor(en)

Mathias Schultheis, Yuen Keong Ng, Josef Hron, Franz Kerschbaum

Abstrakt

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(en)

Institut für Astrophysik, Institut für Mathematik

Externe Organisation(en)

Leiden University

Journal

Astronomy & Astrophysics

Band

338

Seiten

581-591

Anzahl der Seiten

11

ISSN

0004-6361

Publikationsdatum

1998

Peer-reviewed

Ja

ÖFOS 2012

103003 Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/field-3-of-the-palomargroningen-survey-ii-nearinfrared-photometry-of-semiregular-variables(0c17d8d3-d2af-4f3d-a878-65c8cc8a9932).html