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We present single-dish (sub)millimeter observations of gas and dust in the Galactic high-mass star-forming region G19.61-0.23, with the aim of studying the large-scale properties and physical conditions of the molecular gas across the…

We present a multiwavelength study of the H II region Sh 2-301 (S301) using deep optical data, near-infrared data, radio continuum data and other archival data at longer wavelengths. A cluster of young stellar objects (YSOs) is identified…

We present new VLT/MUSE observations of a 3 $\times$ 8 arcmin$^2$ mosaic along the southern major axis of the Local Group galaxy M33. These data provide an unprecedented view of the galaxy's interstellar medium (ISM) and allow us to resolve…

We report on the detection of optically thick free-free radio sources in the galaxies M33, NGC 253, and NGC 6946 using data in the literature. We interpret these sources as being young, embedded star birth regions, which are likely to be…

天体物理学 · 物理学 2009-11-06 Kelsey E. Johnson , Chip Kobulnicky , Phil Massey , Peter Conti

We present here the recent results on two distant Galactic H II regions, namely NGC~2282 and Sh2-149, obtained with multiwavelength observations. Our optical spectroscopic analysis of the bright sources have been used to identify the…

星系天体物理 · 物理学 2018-06-04 Somnath Dutta , Soumen Mondal , Jessy Jose , R K. Das

We present a picture of star formation around the HII region Sh2-235 (S235) based upon data on the spatial distribution of young stellar clusters and the distribution and kinematics of molecular gas around S235. We observed 13CO(1-0) and…

天体物理学 · 物理学 2009-11-13 M. S. Kirsanova , A. M. Sobolev , M. Thomasson , D. S. Wiebe , L. E. B. Johansson , A. F. Seleznev

The Large Magellanic Cloud (LMC), being a nearby and actively star-forming satellite galaxy of the Milky Way, is an ideal site to observe the multi-phase interstellar medium (ISM) of a galaxy across the electromagnetic spectrum. We aim to…

We study three subregions in the HII region N11 which is located at the northeast side of the Large Magellanic Cloud (LMC). We used $^{12}$CO and $^{13}$CO J=3--2 data observed with the Atacama Submillimeter Telescope Experiment (ASTE) with…

星系天体物理 · 物理学 2018-07-16 M. Celis Peña , M. Rubio , S. Paron , C. Herrera

We have carried out a submillimeter continuum and spectroscopic study of the W43 main complex, a massive star-forming region, which harbors a giant HII region. The maps reveal a filamentary structure containing ~50 fragments with masses of…

天体物理学 · 物理学 2011-09-30 Frederique Motte , Peter Schilke , Darek C. Lis

The properties of young stellar clusters (YSCs) in M33, identified from the center out to about twice the size of the bright star-forming disk,are investigated. We find 915 discrete MIR sources as far as the extent of the warped HI disk,…

宇宙学与河外天体物理 · 物理学 2015-05-30 Saurabh Sharma , Edvige Corbelli , Carlo Giovanardi , Leslie K. Hunt , Francesco Palla

We investigate the chemical abundances of NGC3603 in the Milky Way, of 30Doradus in the Large Magellanic Cloud, and of N66 in the Small Magellanic Cloud. Mid-infrared observations with the Infrared Spectrograph onboard the Spitzer Space…

天体物理学 · 物理学 2009-11-13 V. Lebouteiller , J. Bernard-Salas , B. Brandl , D. G. Whelan , Y. Wu , V. Charmandaris , D. Devost , J. R. Houck

We study the 158 micron [CII] fine-structure line emission from star-forming regions as a function of metallicity. We have measured and mapped the [CII] emission from the very bright HII region complexes N 11 in the LMC and N 66 in the SMC,…

宇宙学与河外天体物理 · 物理学 2015-05-27 F. P. Israel , P. R. Maloney

We present images and initial results from our extensive Spitzer Space Telescope imaging survey of the W5 H II region with the Infrared Array Camera (IRAC) and Multiband Imaging Photometer for Spitzer (MIPS). We detect dense clusters of…

We report the discovery of a rich population of low mass stars in the young, massive star forming region N66/NGC346 in the Small Magellanic Cloud, from deep V, I and H alpha images taken with the HST/ACS. These stars have likely formed…

天体物理学 · 物理学 2009-11-11 A. Nota , M. Sirianni , E. Sabbi , M. Tosi , M. Clampin , J. Gallagher , M. Meixner , S. Oey , A. Pasquali , L. J. Smith , R. Walterbos , J. Mack

We present Spitzer-IRAC, NOAO 2.1meter-Flamingos, Keck-NIRC, and FCRAO-SEQUOIA observations of the massive star forming complex S254-S258, covering an area of 25x20 arc-minutes. Using a combination of the IRAC and NIR data, we identify and…

天体物理学 · 物理学 2014-11-18 L. Chavarria , L. Allen , J. L. Hora , C. Brunt , G. G. Fazio

The Large and Small Magellanic Clouds (LMC, SMC) are nearby dwarf galaxies whose proximity uniquely enables molecular cloud-scale resolution observations across the entire Magellanic system, a capability unmatched in any other external…

We investigate the star-formation ocurring in the region towards IRAS07527-3446 in the molecular cloud [MAB97]250.63-3.63, in the far outer Galaxy. We report the discovery of a new young stellar cluster, and describe its properties and…

星系天体物理 · 物理学 2015-05-13 Joao L. Yun , Davide Elia , Pedro M. Palmeirim , Joana I. Gomes , Andre M. Martins

We present an analysis of dust grain emission in the diffuse interstellar medium of the Small Magellanic Cloud (SMC). This study is motivated by the availability of 170 microns ISOPHOT data covering a large part of the SMC, with a…

天体物理学 · 物理学 2009-11-10 C. Bot , F. Boulanger , G. Lagache , L. Cambresy , D. Egret

Aims. The formation and properties of star clusters at the edge of H II regions are poorly known, partly due to limitations in angular resolution and sensitivity, which become particularly critical when dealing with extragalactic clusters.…

天体物理仪器与方法 · 物理学 2016-08-17 A. Bernard , B. Neichel , M. R. Samal , A. Zavagno , M. Andersen , C. J. Evans , H. Plana , T. Fusco

HST ACS/HRC images in UV (F250W), V (F555W), and I (F814W) resolve three isolated OB associations that lie up to 30 kpc from the stellar disk of the S0 galaxy NGC 1533. Previous narrow-band Halpha imaging and optical spectroscopy showed…

天体物理学 · 物理学 2009-11-13 J. K. Werk , M. E. Putman , G. R. Meurer , M. S. Oey , E. V. Ryan-Weber , R. C. Kennicutt , K. C. Freeman