We have analyzed 1455 fundamental mode RR Lyrae of the Galactic field, using the All Sky Automated Survey data. The sample covers 75% of the sky and contains objects in the close neighborhood of the Sun, within 4 kpc distance. Unlike in the previous analysis of the close field RRab, we see a clear manifestation of the Oosterhoff groups on the period ‐amplitude diagram. The relation for Oosterhoff I type variables becomes strongly flattened at large V amplitudes, which was not observed for globular cluster RR Lyrae. We calculate photometric metallicities using methods of Jurcsik & Kovács (1996) and Sandage (2004) and find significant discrepancies between results from both methods. Comparison with spectroscopic metallicities favors the method of Jurcsik & Kovács (1996). In addition, we notice that RRab of Oosterhoff II type follow a different metallicity‐period‐phase relation than Oosterhoff I type variables. The spatial distribution of Galactic field RRab does not show any metallicity gradients with distance from the Galactic Center in either of the Oosterhoff groups. The older, metal poor Oosterhoff II variables are uniformly distributed with the distance from the galactic plane, while the metal rich Oosterhoff I RRab become more concentrated to the Galactic plane with increasing metal content.
Skip Nav Destination
Article navigation
16 September 2009
STELLAR PULSATION: CHALLENGES FOR THEORY AND OBSERVATION: Proceedings of the International Conference
31 May–5 June 2009
Santa Fe, New Mexico (USA)
Research Article|
September 16 2009
Galactic Fundamental Mode RR Lyrae Stars: Period‐Amplitude Diagram, Metallicities and Distribution
D. M. Szczygieł;
D. M. Szczygieł
Warsaw University Observatory, Al. Ujazdowskie 4, 00‐478 Warsaw, Poland
Search for other works by this author on:
G. Pojmański;
G. Pojmański
Warsaw University Observatory, Al. Ujazdowskie 4, 00‐478 Warsaw, Poland
Search for other works by this author on:
B. Pilecki
B. Pilecki
Warsaw University Observatory, Al. Ujazdowskie 4, 00‐478 Warsaw, Poland
Search for other works by this author on:
AIP Conf. Proc. 1170, 255–257 (2009)
Citation
D. M. Szczygieł, G. Pojmański, B. Pilecki; Galactic Fundamental Mode RR Lyrae Stars: Period‐Amplitude Diagram, Metallicities and Distribution. AIP Conf. Proc. 16 September 2009; 1170 (1): 255–257. https://doi.org/10.1063/1.3246457
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
8
Views
Citing articles via
Inkjet- and flextrail-printing of silicon polymer-based inks for local passivating contacts
Zohreh Kiaee, Andreas Lösel, et al.
Effect of coupling agent type on the self-cleaning and anti-reflective behaviour of advance nanocoating for PV panels application
Taha Tareq Mohammed, Hadia Kadhim Judran, et al.
Design of a 100 MW solar power plant on wetland in Bangladesh
Apu Kowsar, Sumon Chandra Debnath, et al.
Related Content
RR Lyrae in LMC Globular Clusters
AIP Conference Proceedings (September 2009)
RR Lyrae Variables in Stellar Systems
AIP Conference Proceedings (September 2009)
Changes in Mean Global Physical Parameters of Blazhko RR Lyrae Stars Derived from Multicolor Photometry
AIP Conference Proceedings (September 2009)
An Oosterhoff Analysis of the Galactic Bulge Field RR Lyrae stars: Implications On Their Absolute Magnitudes
AIP Conference Proceedings (September 2009)
Search for Pulsating Stars in the Globular Cluster M 80 from Ground‐ and Space‐based Observations
AIP Conference Proceedings (September 2009)