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The role of feedback from massive stars is believed to be a key element in the evolution of molecular clouds. We use high-resolution 3D SPH simulations to explore the dynamical effects of a single O7 star located at the centre of a…

Astrophysics of Galaxies · Physics 2015-06-05 S. Walch , A. P. Whitworth , T. Bisbas , R. Wunsch , D. Hubber

Far-UV (FUV), H-alpha, and HI observations of dwarf galaxy Holmberg II are used to trace the interaction between sites of massive star formation and the neutral and ionized components of the surrounding ISM. The data emphasize the…

M17 is one of the youngest and most massive nearby star-formation regions in the Galaxy. It features a bright H II region erupting as a blister from the side of a giant molecular cloud (GMC). Combining photometry from the Spitzer GLIMPSE…

Using the data from the Galactic Ring Survey (GRS) and Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (GLIMPSE), we performed a study for a large-scale infrared bubble with a size of about 16 pc at a distance of 2.0 kpc. We…

Solar and Stellar Astrophysics · Physics 2014-09-17 Jin-Long Xu , Bing-Gang Ju

We investigated the environment of the infrared dust bubble N68 and searched for evidence of triggered star formation in its surroundings. We performed a multiwavelength study of the nebula with data taken from several large-scale surveys:…

Astrophysics of Galaxies · Physics 2015-06-11 Chuan-Peng Zhang , Jun-Jie Wang

We investigated the environment of the infrared dust bubbles S51, N68, and N131 from catalogue of Churchwell et al. (2006), and searched for evidence of triggered star formation.

Astrophysics of Galaxies · Physics 2015-06-11 Chuan-Peng Zhang , Jun-Jie Wang

In this paper, we have conducted an investigation focused on a segment of the $Spitzer$ mid-infrared bubble N59, specifically referred to as R1 within our study. Situated in the inner Galactic plane, this region stands out for its hosting…

Astrophysics of Galaxies · Physics 2024-03-29 Sonu Tabitha Paulson , K. K. Mallick , D. K. Ojha

Massive stars produce copious quantities of ultraviolet radiation beyond the Lyman limit, photoionizing the interstellar medium (ISM) and producing H II regions. As strong sources of recombination- and forbidden-line emission, infrared…

Astrophysics of Galaxies · Physics 2012-02-06 Matthew S. Povich

The expansion of HII regions can trigger the formation of stars. An overdensity of young stellar objects (YSOs) is observed at the edges of HII regions but the mechanisms that give rise to this phenomenon are not clearly identified.…

We investigate the star formation activity in the molecular complex associated with the Galactic HII region Sh2-90, using radio-continuum maps obtained at 1280 MHz and 610 MHz, Herschel Hi-GAL observations at 70 -- 500 microns, and deep…

Solar and Stellar Astrophysics · Physics 2015-06-19 M. R. Samal , A. Zavagno , L. Deharveng , S. Molinari , D. K. Ojha , D. Paradis , J. Tigé , A. K. Pandey , D. Russeil

It is generally believed that expanding superbubbles and mechanical feedback from massive stars trigger star formation, because there are numerous examples of superbubbles showing secondary star formation at their edges. However, while…

Astrophysics · Physics 2009-11-10 M. S. Oey , A. M. Watson , K. Kern , G. L. Walth

We report the observational findings of the Sh2-112 H{\sc ii} region by using the multiwavelength data analysis ranging from optical to radio wavelengths. This region is powered by a massive O8V-type star BD +45 3216. The surface density…

Solar and Stellar Astrophysics · Physics 2020-12-23 Neelam Panwar , Saurabh Sharma , D. K. Ojha , Tapas Baug , L. K. Dewangan , B. C. Bhatt , Rakesh Pandey

We examine the thirteen most luminous sources in the WMAP free-free map using the Spitzer GLIMPSE and MSX surveys to identify massive star formation regions, emitting one-third of the Galactic free-free luminosity. We identify star forming…

Astrophysics of Galaxies · Physics 2010-07-28 Mubdi Rahman , Norman Murray

Radiative feedback from massive stars can potentially trigger star formation in the surrounding molecular gas. Inspired by the case of radiatively driven implosion in M16 or Eagle Nebula, we analyze a similar case of star formation observed…

Solar and Stellar Astrophysics · Physics 2018-09-12 Soumen Deb , Roland Kothes , Erik Rosolowsky

We explore the physical environment of the Galactic mid-infrared (MIR) bubble [HKS2019] E71 (hereafter E71) through a multi-wavelength approach. E71 is located at the edge of a filamentary structure, as traced in Herschel images (250-500…

We present an observational study of small-scale feedback processes operating in the star-forming region located in the wall of the expanding supershell around the Cyg OB1 association. The interstellar gas and dust content and pre-stellar…

Astrophysics of Galaxies · Physics 2019-04-17 T. G. Sitnik , O. V. Egorov , T. A. Lozinskaya , A. V. Moiseev , A. M. Tatarnikov , O. V. Vozyakova , D. S. Wiebe

By observing radiation-affected gas in the Cepheus B molecular cloud we probe whether the sequential star formation in this source is triggered by the radiation from newly formed stars. We used the dual band receiver GREAT onboard SOFIA to…

Astrophysics of Galaxies · Physics 2015-06-04 B. Mookerjea , V. Ossenkopf , O. Ricken , R. Guesten , U. U. Graf , K. Jacobs , C. Kramer , R. Simon , J. Stutzki

We perform a multiwavelength study toward the SNR G18.1-0.1 and nearby several HII regions (infrared dust bubbles N21 and N22, and the HII regions G018.149-00.283 and G18.197-00.181). Our goal is to provide observational evidence supporting…

Astrophysics of Galaxies · Physics 2015-06-15 S. Paron , W. Weidmann , M. E. Ortega , J. F. Albacete Colombo , A. Pichel

An investigation in radio and infrared wavelengths of two high-mass star forming regions toward the southern Galactic bubble S10 is presented here. The two regions under study are associated with the broken bubble S10 and Extended Green…

Astrophysics of Galaxies · Physics 2016-11-09 Swagat Ranjan Das , Anandmayee Tej , Sarita Vig , Swarna K. Ghosh , Ishwara Chandra C. H.

Stars form by gravoturbulent fragmentation of interstellar gas clouds. The supersonic turbulence ubiquitously observed in Galactic molecular gas generates strong density fluctuations with gravity taking over in the densest and most massive…