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The autocorrelation function provides an objective test for the existence of special scales in the hierarchical clustering of young stars. We apply this measure to single-star photometry for the brightest main sequence stars in the Small…

Astrophysics · Physics 2008-04-30 Mary Crone Odekon

The Magellanic System (MS), consisting of the Large Magellanic Cloud (LMC), the Small Magellanic Cloud (SMC) and the Magellanic Bridge (MBR), contains diverse sample of star clusters. Their spatial distribution, ages and chemical abundances…

We report the first detection of a hot molecular core outside our Galaxy based on radio observations with ALMA toward a high-mass young stellar object (YSO) in a nearby low metallicity galaxy, the Large Magellanic Cloud (LMC). Molecular…

Astrophysics of Galaxies · Physics 2016-08-17 Takashi Shimonishi , Takashi Onaka , Akiko Kawamura , Yuri Aikawa

Aims: We wish to establish whether sequential star formation is taking place at the periphery of the Galactic HII region Sh2-212. Methods: We present CO millimetre observations of this region obtained at the IRAM 30-m telescope to…

Astrophysics · Physics 2009-11-13 L. Deharveng , B. Lefloch , S. Kurtz , D. Nadeau , M. Pomarès , J. Caplan , A. Zavagno

We have undertaken a detailed analysis of HST/WFPC2 and STIS imaging observations, and of supplementary wide-field ground-based observations obtained with the NTT of two young ~10-25 Myr) compact star clusters in the LMC, NGC 1805 and NGC…

Astrophysics · Physics 2009-11-07 R. de Grijs , R. A. Johnson , G. F. Gilmore , C. M. Frayn

We analyze the conditions for detection of CO(1-0) emission in the Large Magellanic Cloud (LMC), using the recently completed second NANTEN CO survey. In particular, we investigate correlations between CO integrated intensity and HI…

Astrophysics of Galaxies · Physics 2011-02-11 T. Wong , A. Hughes , Y. Fukui , A. Kawamura , N. Mizuno , J. Ott , E. Muller , J. L. Pineda , D. E. Welty , S. Kim , Y. Mizuno , M. Murai , T. Onishi

We present infrared and radio continuum observations of S 201 star forming region. A massive star cluster is observed in this region, which contains different classes of young stellar objects. The near-infrared colour-colour and…

Astrophysics · Physics 2009-11-10 D. K. Ojha , S. K. Ghosh , V. K. Kulkarni , L. Testi , R. P. Verma , S. Vig

We have observed an evolved star with a rare combination of spectral features, MSX SMC 029, in the Small Magellanic Cloud (SMC) using the low-resolution modules of the Infrared Spectrograph on the Spitzer Space Telescope. A cool dust…

Young HII regions are an important site to study O star formation based on distributions of ionized and molecular gas. We revealed that two molecular clouds at $\sim 48$ km s$^{-1}$ and $\sim 53$ km s$^{-1}$ are associated with the HII…

We investigate structural, kinematical, and chemical properties of stars and gas in the Small Magellanic Cloud (SMC) interacting with the Large Magellanic Cloud (LMC) and the Galaxy based on a series of self-consistent chemodynamical…

Astrophysics · Physics 2009-11-13 Kenji Bekki , Masashi Chiba

We are conducting a survey of several regions of high-mass star formation to assess their content and structure. The observations include Spitzer observations, ground-based optical and near-IR imaging surveys, and optical and IR spectra of…

Astrophysics · Physics 2011-03-10 L. E. Allen , J. L. Hora , S. T. Megeath , L. K. Deutsch , G. G. Fazio , L. Chavarria , R. W. Dell

IRAS 17256-3631 is a southern Galactic massive star forming region located at a distance of 2 kpc. In this paper, we present a multiwavelength investigation of the embedded cluster, the HII region, as well as the parent cloud. Radio images…

Astrophysics of Galaxies · Physics 2016-01-27 V. S. Veena , S. Vig , A. Tej , W. P. Varricatt , S. K. Ghosh , T. Chandrasekhar , N. M. Ashok

We have determined column densities of H I and/or H_2 for sight lines in the Magellanic Clouds from archival HST and FUSE spectra of H I Lyman-alpha and H_2 Lyman-band absorption. Together with some similar data from the literature, we now…

Astrophysics of Galaxies · Physics 2015-06-03 Daniel E. Welty , Rui Xue , Tony Wong

A number of very small isolated HII regions have been discovered at projected distances up to 30 kpc from their nearest galaxy. These HII regions appear as tiny emission line objects in narrow band images obtained by the NOAO Survey for…

New star cluster candidates projected toward the Large and Small Magellanic Clouds (L/SMC) have been recently discovered from relatively deep imaging surveys. We here conduct a sound analysis of 24 star cluster candidates located in the…

Astrophysics of Galaxies · Physics 2021-03-10 Andrés E. Piatti

Aims. Filamentary structures of early type stars are found to be a common feature of the Magellanic Clouds formed at an age of about 0.9-2*10^8 yr. As we go to younger ages these large structures appear fragmented and sooner or later form…

The Magellanic Stream (MS) is a well-resolved gaseous tail originating from the Magellanic Clouds. Studies of its physical properties and chemical composition are needed to understand its role in Galactic evolution. We investigate the…

Astrophysics of Galaxies · Physics 2015-06-23 Nimisha Kumari , Andrew J. Fox , Jason Tumlinson , Christopher Thom , Tobias Westmeier , Justin Ely

We describe a moderate-resolution FUSE survey of H2 along 70 sight lines to the Small and Large Magellanic Clouds, using hot stars as background sources. FUSE spectra of 67% of observed Magellanic Cloud sources (52% of LMC and 92% of SMC)…

We present ALMA observations with a 800 au resolution and radiative-transfer modelling of the inner part ($r\approx6000$ au) of the ionized accretion flow around a compact star cluster in formation at the center of the luminous…

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