Population I Cepheids and star formation history of the Large Magellanic Cloud
arXiv:1310.2176 · doi:10.1016/j.newast.2013.10.001
Abstract
In this paper we study the Cepheids distribution in the Large Magellanic Cloud (LMC) as a function of their ages using data from the OGLE III photometric catalogue. To determine age of the Pop I Cepheids, we derived a period-age (PA) relationship using the Cepheids found in the LMC star clusters. We find two peaks in the period distribution at logP =0.49+/-0.01 and logP =0.28+/-0.01 days which correspond to fundamental and first overtone pulsation modes, respectively. Ages of the Cepheids are used to understand star formation scenario in the LMC in last 30-600 Myr. The age distribution of the LMC Cepheids is found to have a peak at log(Age)=8.2+/-0.1. This suggests that major star formation event took place at about 125-200 Myr ago which may have been triggered by a close encounter between the SMC and the LMC. Cepheids are found to be asymmetrically distributed throughout the LMC and many of them lie in clumpy structures along the bar. The frequency distribution of Cepheids suggests that most of the clumps are located to the eastern side of the LMC optical center.
2014, New Astronomy, 28, 27
References in corpus (6)
- Is the SMC Bound to the LMC? The HST Proper Motion of the SMC
- Calcium II Triplet Spectroscopy of LMC Red Giants. I. Abundances and Velocities for a Sample of Populous Clusters
- Structure of the Large Magellanic Cloud from the Near Infrared magnitudes of Red Clump stars
- A comprehensive study of Cepheid variables in the Andromeda galaxy. Period distribution, blending and distance determination
- New homogeneous iron abundances of double-mode Cepheids from high-resolution echelle spectroscopy
- The Properties of the Large Magellanic Cloud Based on OGLE III Photometry of RR Lyrae Stars
Cited by in corpus (5)
- Disk of the Small Magellanic Cloud as traced by Cepheids
- Reddening map and recent star formation in the Magellanic Clouds based on OGLE IV Cepheids
- Segments of spiral arms of the Galaxy traced by classical Cepheids: Effects of age heterogeneity
- Peeping into recent star formation history of the Magellanic Clouds
- Population I Cepheids and understanding star formation history of the Small Magellanic Cloud