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Jayanand Maurya & Yogesh Chandra Joshi

Photometric study of the open cluster NGC 381

(Volume 88 - Année 2019 — Actes de colloques — 2nd Belgo-Indian Network for Astronomy & Astrophysics (BINA) workshop - October 2018 - Brussels, Belgium)
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Mots-clés : agrégat ouvert, NGC 381, étoile, évolution, photométrie

Abstract

We present UBVRcIc photometry of stars, down to the 20th magnitude, in the region of the intermediate-age open cluster NGC 381. The core and the cluster radii are estimated to be 2.99 ± 0.93 and 5.6 ± 0.1 arcmin, respectively. A total of 350 probable cluster member stars are identified by using proper motion from GAIA as the criterion of membership. The mean proper motion of the cluster is ūx = 1.55 ± 0.38 mas yr-1, ūy = -2.19 ± 0.39 mas yr-1. We notice an anomalous reddening as the optical total-to-selective extinction ratio in the direction of the cluster Rcluster = 3.7 ± 0.1. The reddening E(BV) = 0.35 ± 0.04 mag is found in the direction of the cluster NGC 381. The distance to the cluster is 957 ± 93 pc and the cluster has an estimated age of log(Age)=8.50 ± 0.05 years.

Keywords : open cluster: NGC 381, stars, evolution, techniques, photometric

To cite this article

Jayanand Maurya & Yogesh Chandra Joshi, «Photometric study of the open cluster NGC 381», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 88 - Année 2019, Actes de colloques, 2nd Belgo-Indian Network for Astronomy & Astrophysics (BINA) workshop - October 2018 - Brussels, Belgium, 291 - 294 URL : https://popups.uliege.be/0037-9565/index.php?id=9003.

About: Jayanand Maurya

Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital 263002, India

About: Yogesh Chandra Joshi

Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital 263002, India