Variable stars in young open star cluster NGC 7380

Abstract

We present time series photometry of 57 variable stars in the cluster region NGC 7380. The association of these variable stars to the cluster NGC 7380 has been established on the basis of two colour diagrams and colour-magnitude diagrams. Seventeen stars are found to be main-sequence variables, which are mainly B type stars and are classified as slowly pulsating B stars, $\beta$ Cep or $\delta$ Scuti stars. Some of them may belong to new class variables as discussed by Mowlavi et al. (2013) and Lata et al. (2014). Present sample also contains 14 pre-main-sequence stars, whose ages and masses are found to be mostly $\lesssim$ 5 Myr and range 0.60 $\lesssim M/M_{\odot }\lesssim$ 2.30 and hence should be T-Tauri stars. About half of the weak line T-Tauri stars are found to be fast rotators with a period of $\lesssim$ 2 days as compared to the classical T-Tauri stars. Some of the variables belong to the field star population.

14pages, 16 figures, accepted for publication in MNRAS. arXiv admin note: text overlap with arXiv:1209.1472

References in corpus (10)

• Physical Properties of Wolf-Rayet Stars
• Results of the ROTOR-program. I. The long-term photometric variability of classical T Tauri stars
• Results of the ROTOR-program. II. The long-term photometric variability of weak-line T Tauri stars
• Young Stellar Object Variability (YSOVAR): Long Timescale Variations in the Mid-Infrared
• Stellar variability in open clusters. I. A new class of variable stars in NGC 3766
• Star Formation and Young Population of the HII Complex Sh2-294
• Main-sequence variable stars in young open cluster NGC 1893
• Pulsating pre-main sequence stars in IC 4996 and NGC 6530
• Pre-main sequence variable stars in young open cluster NGC 1893
• Pre-main-sequence population in NGC 1893 region: X-ray properties

Cited by in corpus (11)

• An Adaptive Optics Survey of Stellar Variability at the Galactic Center
• Young cluster Berkeley 59 : Properties, evolution and star formation
• Variability of young stellar objects in the star-forming region Pelican Nebula
• Period-luminosity relations of fast-rotating B-type stars in the young open cluster NGC3766
• Variable stars in the Sh 2-170 HII region
• Short period variable stars in young open cluster Stock 8
• Diagnosing Triggered Star Formation in the Galactic H II region Sh 2-142
• A Search for variable stars in the four open star clusters
• High-precision broadband linear polarimetry of early-type binaries IV. Binary system of DH Cephei in the open cluster of NGC 7380
• Photometric observations of NGC 281: Detection of 228 variable stars
• Photometric variability of the pre-main sequence stars towards the Sh 2-190 region