The Carina Project. VI. The helium burning variable stars
作者： G. Coppola , P. B. Stetson , M. Marconi , G. Bono , V. Ripepi
DOI: 10.1088/0004-637X/775/1/6
关键词: Astrophysics 、 Cepheid variable 、 Bulge 、 Dwarf spheroidal galaxy 、 Large Magellanic Cloud 、 Distance modulus 、 Variable star 、 RR Lyrae variable 、 Stars 、 Astronomy 、 Physics
摘要: We present new optical (BVI) time-series data for the evolved variable stars in Carina dwarf spheroidal galaxy. The quality of and observing strategy allowed us to identify 14 stars. Eight out are RR Lyrae (RRL) stars, four Anomalous Cepheids (ACs) two geometrical variables. Comparison period distribution entire sample RRLs with similar distributions nearby dSphs Large Magellanic Cloud indicates that old stellar populations these systems share properties. This finding is also supported by RRL Bailey diagram. On other hand, diagram ACs display significant differences among above systems. evidence suggests properties intermediate-age might be affected both environmental effects structural parameters. use BV Period--Wesenheit (PW) relation together evolutionary prescriptions find a true distance modulus 20.09+/-0.07(intrinsic)+/-0.1(statistical) mag agrees quite well estimates available literature. identified peculiar Taking into account their position PW relation, them (V14, V149) appear candidate ACs, while (V158, V182) RRLs. In particular, V158 has V-band amplitude very low-mass ---RRLR-02792---recently Pietrzynski at al. (2012) Galactic bulge.
arxiv.org
sci-hub.se 参考文章(93)
F. Mannucci, G. Cresci, R. Maiolino, A. Marconi, A. Gnerucci, A fundamental relation between mass, SFR and metallicity in local and high redshift galaxies arXiv: Cosmology and Nongalactic Astrophysics. ,(2010) , 10.1111/J.1365-2966.2010.17291.X
Grzegorz Pietrzyński, Marek Górski, Wolfgang Gieren, Valentin D. Ivanov, Fabio Bresolin, Rolf-Peter Kudritzki, The Araucaria Project. Infrared TRGB distances to the Carina and Fornax dwarf spheroidal galaxies arXiv: Astrophysics of Galaxies. ,(2009) , 10.1088/0004-6256/138/2/459
Giuseppe Bono, Filippina Caputo, Santi Cassisi, Vittorio Castellani, Marcella Marconi, Robert F. Stellingwerf, Second Overtone Pulsators among δ Scuti Stars The Astrophysical Journal. ,vol. 477, pp. 346- 355 ,(1997) , 10.1086/303710
Steffen Mieske, Igor V. Chilingarian, Igor V. Chilingarian, Michael Hilker, Leopoldo Infante, Dynamical versus stellar masses of ultracompact dwarf galaxies in the Fornax cluster Monthly Notices of the Royal Astronomical Society. ,vol. 412, pp. 1627- 1638 ,(2011) , 10.1111/J.1365-2966.2010.18000.X
R. F. Stellingwerf, F. Caputo, A. Pietrinferni, G. Bono, G. Bono, G. Bono, M. Marconi, A. M. Piersimoni, ON THE PERIOD DISTRIBUTION OF CLUSTER RR LYRAE STARS TO CONSTRAIN THEIR HELIUM CONTENT: THE CASE OF ω CENTAURI The Astrophysical Journal. ,vol. 738, pp. 111- ,(2011) , 10.1088/0004-637X/738/1/111
Peter B. Stetson, Homogeneous Photometry. IV. On the Standard Sequence in the Globular Cluster NGC 2419 Publications of the Astronomical Society of the Pacific. ,vol. 117, pp. 563- 588 ,(2005) , 10.1086/430281
V. Castellani, A. Calamida, G. Bono, P. B. Stetson, L. M. Freyhammer, S. Degl’Innocenti, P. Prada Moroni, M. Monelli, C. E. Corsi, M. Nonino, R. Buonanno, F. Caputo, M. Castellani, M. Dall’Ora, M. Del Principe, I. Ferraro, G. Iannicola, A. M. Piersimoni, L. Pulone, C. Vuerli, Star Counts in the Globular Cluster ω Centauri. I. Bright Stellar Components The Astrophysical Journal. ,vol. 663, pp. 1021- 1039 ,(2007) , 10.1086/518209
Francesca Matteucci, Gustavo A. Lanfranchi, Gabriele Cescutti, Detailed Chemical Evolution of Carina and Sagittarius Dwarf Spheroidal Galaxies Astronomy and Astrophysics. ,vol. 453, pp. 67- 75 ,(2006) , 10.1051/0004-6361:20054627
Grzegorz Pietrzyński, Wolfgang Gieren, Mario Hamuy, Giuliano Pignata, Igor Soszyński, Andrzej Udalski, Alistair Walker, Pascal Fouqué, Fabio Bresolin, Rolf-Peter Kudritzki, Alejandro Garcia-Varela, Olaf Szewczyk, Michał Szymański, Marcin Kubiak, Łukasz Wyrzykowski, THE ARAUCARIA PROJECT: FIRST CEPHEID DISTANCE TO THE SCULPTOR GROUP GALAXY NGC 7793 FROM VARIABLES DISCOVERED IN A WIDE-FIELD IMAGING SURVEY* The Astronomical Journal. ,vol. 140, pp. 1475- 1485 ,(2010) , 10.1088/0004-6256/140/5/1475
G. Pietrzyński, I. B. Thompson, W. Gieren, D. Graczyk, K. Stępień, G. Bono, P. G. Prada Moroni, B. Pilecki, A. Udalski, I. Soszyński, G. W. Preston, N. Nardetto, A. McWilliam, I. U. Roederer, M. Górski, P. Konorski, J. Storm, RR-Lyrae-type pulsations from a 0.26-solar-mass star in a binary system Nature. ,vol. 484, pp. 75- 77 ,(2012) , 10.1038/NATURE10966