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We present a multiwavelength study of the NGC 281 complex which contains the young cluster IC 1590 at the center, using deep wide-field optical UBVI_c photometry, slitless spectroscopy along with archival data sets in the near-infrared…

Astrophysics of Galaxies · Physics 2015-06-04 Saurabh Sharma , A. K. Pandey , J. C. Pandey , N. Chauhan , K. Ogura , D. K. Ojha , J. Borrissova , H. Mito , T. Verdugo , B. C. Bhatt

Results of a study of physical parameters of stellar population in star formation regions in galaxies with signs of peculiarity NGC 3963 and NGC 7292 are presented. The study was carried out based on the analysis of photometric (UBVRI…

Astrophysics of Galaxies · Physics 2024-10-10 A. S. Gusev , F. Kh. Sakhibov , A. V. Moiseev , V. S. Kostiuk , D. V. Oparin

The very young open cluster NGC 6383 centered on the O-star binary HD 159176 is an interesting place for studying the impact of early-type stars with strong radiation fields and powerful winds on the formation processes of low-mass stars.…

Solar and Stellar Astrophysics · Physics 2015-05-14 G. Rauw , J. Manfroid , M. De Becker

NGC6357 is an active star forming region with very young massive open clusters (OC). These clusters contain some of the most massive stars in the Galaxy and strongly interact with nearby giant molecular clouds (GMC). We study the young…

Solar and Stellar Astrophysics · Physics 2014-12-24 Fabrizio Massi , Andrea Giannetti , Elisa di Carlo , Jan Brand , Maria Teresa Beltrán , Gianni Marconi

Young massive clusters are as young as open clusters but more massive and compact compared with typical open clusters. The formation process of young massive clusters is still unclear, and it is an open question whether the formation…

Astrophysics of Galaxies · Physics 2015-06-23 Michiko S. Fujii

It is well known that most of the stars form in rich clusters. However, recent $Spitzer$ observations have shown that a significant number of stars also form in distributed mode, origin of which is not well understood. In this work, we aim…

Solar and Stellar Astrophysics · Physics 2019-02-20 Neelam Panwar , Manash R. Samal , A. K. Pandey , H. P . Singh , Saurabh Sharma

Deep and wide-field optical photometric observations along with multiwavelength archival datasets have been employed to study the physical properties of the cluster NGC 6910. The study also examines the impact of massive stars to their…

Solar and Stellar Astrophysics · Physics 2020-06-17 Harmeen Kaur , Saurabh Sharma , Lokesh K. Dewangan , Devendra K. Ojha , Alok Durgapal , Neelam Panwar

Observations suggest that there is a significant fraction of O-stars in the field of the Milky Way that appear to have formed in isolation or in low mass clusters ($<$100 $M_\odot$). The existence of these high-mass stars that apparently…

In this paper an extensive survey of the star forming complex Sh2-252 has been undertaken with an aim to explore its hidden young stellar population as well as to understand the structure and star formation history. This complex is composed…

Solar and Stellar Astrophysics · Physics 2015-06-15 Jessy Jose , A. K. Pandey , M. R. Samal , D. K. Ojha , K. Ogura , J. S. Kim , N. Kobayashi , A. Goyal , N. Chauhan , C. Eswaraiah

We present a global study of low mass, young stellar object (YSO) surface densities in nearby (< 500 pc) star forming regions based on a comprehensive collection of Spitzer Space Telescope surveys. We show that the distribution of YSO…

W4 is a giant H{\sc ii} region ionized by the OB stars of the cluster IC~1805. The H{\sc ii} region/cluster complex has been a subject of numerous investigations as it is an excellent laboratory for studying the feedback effect of massive…

Astrophysics of Galaxies · Physics 2017-05-03 Neelam Panwar , M. R. Samal , A. K. Pandey , J. Jose , W. P. Chen , D. K. Ojha , K. Ogura , H. P. Singh , R. K. Yadav

This article reviews some recent studies of the mass, age, and space distributions of star clusters, with a primary focus on the large population of clusters in the interacting Antennae galaxies. Some of the highlights of these studies are…

Astrophysics · Physics 2007-05-23 S. Michael Fall

We have carried out deep (V$\sim$21 mag) \ubvri photometric study of the star cluster Stock 18. These along with archival Infrared data have been used to derive the basic cluster parameters and also to study the star formation processes in…

Solar and Stellar Astrophysics · Physics 2015-05-30 Himali Bhatt , Ram Sagar , J. C. Pandey

We have studied the optical spectra of a sample of 31 O- and early B-type stars in the Small Magellanic Cloud, 21 of which are associated with the young massive cluster NGC 346. Stellar parameters are determined using an automated fitting…

It has recently been established that the properties of young star clusters (YSCs) can vary as a function of the galactic environment in which they are found. We use the cluster catalogue produced by the Legacy Extragalactic UV Survey…

Some of the youngest stars (age $\lesssim 10$ Myr) are clustered, while many others are observed scattered throughout star forming regions or in complete isolation. It has been intensively debated whether the scattered or isolated stars…

Astrophysics of Galaxies · Physics 2022-04-20 František Dinnbier , Pavel Kroupa , Richard I. Anderson

We investigate the triggering of star formation and the formation of stellar clusters in molecular clouds that form as the ISM passes through spiral shocks. The spiral shock compresses gas into $\sim$100 pc long main star formation ridge,…

Astrophysics of Galaxies · Physics 2017-10-13 R. Smilgys , I. A. Bonnell

Most stars do not form in isolation but as part of a cluster comprising anywhere between a few dozen to several million stars with stellar densities ranging from 0.01 to several 10$^5$ \Msun pc$^{-3}$. The majority of these clusters…

Astrophysics of Galaxies · Physics 2015-05-13 S. Pfalzner

Young massive clusters (YMCs) are usually accompanied by lower-mass clusters and unbound stars with a total mass equal to several tens times the mass of the YMC. If this was also true when globular clusters (GCs) formed, then their cosmic…

Astrophysics of Galaxies · Physics 2018-12-26 Bruce G. Elmegreen