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We have carried out a search for filamentary structures in the Taurus molecular cloud using $\rm^{13}CO$ line emission data from the FCRAO survey of $\rm \sim100 \, deg^2$. We have used the topological analysis tool, DisPerSe, and…

太阳与恒星天体物理 · 物理学 2016-02-04 G. V. Panopoulou , K. Tassis , P. F. Goldsmith , M. H. Heyer

Observations of translucent molecular gas in $^{12}$CO and $^{13}$CO emission lines, at high spectral and spatial resolutions, evidence different kinds of structures at small scales: (1) optically thin $^{12}$CO emission, (2) optically…

天体物理学 · 物理学 2007-05-23 Pierre Hily-Blant , Jerome Pety , Edith Falgarone

We performed new large-scale $^{12}$CO, $^{13}$CO, and C$^{18}$O $J=$1--0 observations of the W43 giant molecular cloud complex in the tangential direction of the Scutum arm ($l\sim {30^\circ}$) as a part of the FUGIN project. The…

Hub-filament systems are suggested to be birth cradles of high-mass stars and clusters, but the formation of hub-filament structure is still unclear. Using the survey data FUGIN $^{13}$CO (1-0), C$^{18}$O (1-0), and SEDIGISM $^{13}$CO…

星系天体物理 · 物理学 2022-12-14 Jian-Wen Zhou , Shanghuo Li , Hong-Li Liu , Yaping Peng , Siju Zhang , Feng-Wei Xu , Chao Zhang , Tie Liu , Jin-Zeng Li

The massive infrared dark cloud G0.253+0.016 projected 45pc from the Galactic centre contains ~10^5Msun of dense gas whilst being mostly devoid of observed star-formation tracers. To scrutinise the physical properties, dynamics and…

星系天体物理 · 物理学 2014-11-12 K. G. Johnston , H. Beuther , H. Linz , A. Schmiedeke , S. E. Ragan , Th. Henning

We study the G013.313+0.193 G013.313 region, a complex environment characterized by molecular cloud interactions indicative of cloud-cloud collision (CCC). Observations of the NH3(1,1) and (2,2) inversion transitions were obtained using the…

We present 3.7 arcsec (~0.05 pc) resolution 3.2 mm dust continuum observations from the IRAM PdBI, with the aim of studying the structure and fragmentation of the filamentary Infrared Dark Cloud G035.39-00.33. The continuum emission is…

[DBS2003]179 is a super star cluster in the Galaxy discovered by deep near infrared observations. We carried out CO J=1-0 and J=3-2 observations of the region of [DBS2003]179 with NANTEN2, ASTE and the Mopra 22m telescope. We identified and…

星系天体物理 · 物理学 2020-05-06 Sho Kuwahara , Kazufumi Torii , Norikazu Mizuno , Shinji Fujita , Mikito Kohno , Yasuo Fukui

Herein, we present results from observations of the 12CO (J=1-0), 13CO (J=1-0), and 12CO (J=2-1) emission lines toward the Carina nebula complex (CNC) obtained with the Mopra and NANTEN2 telescopes. We focused on massive-star-forming…

We present distributions of two molecular clouds having velocities of 2 km s$^{-1}$ and 14 km s$^{-1}$ toward RCW 38, the youngest super star cluster in the Milky Way, in the $^{12}$CO ($J=$1--0 and 3--2) and $^{13}$CO ($J=$1--0)…

We undertake the first detailed analysis of the stellar population and spatial properties of a diffuse substructure in the outer halo of M31. The South-West Cloud lies at a projected distance of ~100 kpc from the centre of M31, and extends…

We present maps of the cosmic large-scale structure around the twelve most distant galaxy clusters from the Massive Cluster Survey (MACS) as traced by the projected surface density of galaxies on the cluster red sequence. Taken with the…

天体物理学 · 物理学 2009-11-13 Jeyhan S. Kartaltepe , Harald Ebeling , C. J. Ma , David Donovan

We have performed a multi-wavelength study of the mid-infrared bubble S44 to investigate the origin of isolated high-mass star(s) and the star-formation process around the bubble formed by the HII region. In this paper, we report the…

W51A is one of the most active star-forming region in our Galaxy, which contains giant molecular clouds with a total mass of 10^6 Msun. The molecular clouds have multiple velocity components over ~20 km/s, and interactions between these…

We look into the 2851 $^{12}$CO molecular clouds harboring $^{13}$CO structures to reveal the distribution of the projected angular separations and radial velocity separations between their internal $^{13}$CO structures. The projected…

星系天体物理 · 物理学 2023-02-22 Lixia Yuan , Ji Yang , Fujun Du , Xunchuan Liu , Yang Su , Qing-Zeng Yan , Xuepeng Chen , Yan Sun , Shaobo Zhang , Xin Zhou , Yuehui Ma

We attempt to visually classify the morphologies of 18190 molecular clouds, which are identified in the $^{12}$CO(1-0) spectral line data over $\sim$ 450 deg$^{2}$ of the second Galactic quadrant from the Milky Way Imaging Scroll Painting…

星系天体物理 · 物理学 2021-12-08 Lixia Yuan , Ji Yang , Fujun Du , Xunchuan Liu , Shaobo Zhang , Zehao Lin , Jingfei Sun , Qing-Zeng Yan , Yuehui Ma , Yang Su , Yan Sun , Xin Zhou

We investigate the star formation processes operating in a mid-infrared bubble N49 site, which harbors an O-type star in its interior, an ultracompact HII region, and a 6.7 GHz methanol maser at its edges. The 13CO line data reveal two…

星系天体物理 · 物理学 2017-12-27 L. K. Dewangan , D. K. Ojha , I. Zinchenko

We present molecular line observations, made with angular resolutions of ~20", toward the filamentary infrared dark cloud G34.43+0.24 using the APEX [CO(3-2), 13CO(3-2), C18O(3-2) and CS(7-6) transitions], Nobeyama 45 m [CS(2-1), SiO(2-1),…

星系天体物理 · 物理学 2015-03-17 Patricio Sanhueza , Guido Garay , Leonardo Bronfman , Diego Mardones , Jorge May , Masao Saito

The filamentary infrared dark cloud L1287 is actively forming a dense cluster of low-mass YSOs at its inner $\sim$0.1 pc region. To help understand the origin of this low-mass YSO cluster, the present work aims at resolving the gas…

太阳与恒星天体物理 · 物理学 2019-01-23 Carmen Juárez , Hauyu-Baobab Liu , Josep M. Girart , Aina Palau , Gemma Busquet , Roberto Galván-Madrid , Naomi Hirano , Yuxin Lin

We present compelling observational evidence of G133.50+9.01 being a bona fide cloud-cloud collision candidate with signatures of induced filament, core, and cluster formation. The CO molecular line observations reveal that the G133.50+9.01…

太阳与恒星天体物理 · 物理学 2020-10-14 Namitha Issac , Anandmayee Tej , Tie Liu , Yuefang Wu