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相关论文: Molecular CO outflows in the L1641-N cluster: knea…

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We report the results of a series of AMR radiation-hydrodynamic simulations of the collapse of massive star forming clouds using the ORION code. These simulations are the first to include the feedback effects protostellar outflows, as well…

太阳与恒星天体物理 · 物理学 2015-05-27 Andrew J. Cunningham , Richard I. Klein , Mark R. Krumholz , Christopher F. McKee

High spatial resolution low-J 12CO observations have shown that the wide-angle outflow seen in the Orion BN/KL region correlates with the famous H2 fingers. Recently, high-resolution large-scale mappings of mid- and higher-J CO emissions…

星系天体物理 · 物理学 2012-09-04 T. -C. Peng , L. A. Zapata , F. Wyrowski , R. Güsten , K. M. Menten

We present Atacama Large Millimeter/submillimeter Array Band 3 observations of N$_2$H$^+$ (1-0) and CH$_3$CN (5-4), as well as Band 7 observations of the H$_2$CO molecular line emissions from the protostellar system GGD 27-MM2(E). Through…

This work explored the spatial distribution of C$^{17}$O, SiO, HC$_{3}$N and SO$_{2}$ molecules, as well as the energetics of outflows in G358.46$-$0.39 proto-cluster using ALMA band 7 archival data, with the aim of providing an improved…

星系天体物理 · 物理学 2025-11-20 Chukwuebuka J. Ugwua , James O. Chibuezea , Willice Obonyoa , Mavis Seidu

We present a multiwavelength investigation of a region of a nearby giant molecular cloud that is distinguished by a minimal level of star formation activity. With our new 12CO(J=2-1) and 13CO(J=2-1) observations of a remote region within…

星系天体物理 · 物理学 2017-05-24 Nia Imara , Charles Lada , John Lewis , John H. Bieging , Shuo Kong , Marco Lombardi , Joao Alves

The BN/KL region in the Orion molecular cloud is an archetype in the study of the formation of stars much more massive than the Sun. This region contains luminous young stars and protostars, but it is difficult to study because of overlying…

天体物理学 · 物理学 2009-10-31 L. J. Greenhill , C. R. Gwinn , C. Schwartz , J. M. Moran , P. J. Diamond

We made a detailed observational analysis of a well known hot molecular core lying in the high-mass star-forming region G31.41+0.31. This core is believed to contain deeply embedded massive stars and presents a velocity gradient that has…

太阳与恒星天体物理 · 物理学 2015-05-28 R. Cesaroni , M. T. Beltrán , Q. Zhang , H. Beuther , C. Fallscheer

We report the detection of outflowing molecular gas in the center of the nearby (z=0.014) massive radio galaxy NGC6328. The radio core of the galaxy, PKS B1718-649, is identified as a Gigahertz Peaked Spectrum source with a compact (2 pc)…

The earliest stages of low-mass star-formation are unclear, but it has been proposed that Chamaeleon-MMS1 is a candidate First Hydrostatic Core (FHSC), the transition stage between a prestellar and protostellar core. This work describes the…

太阳与恒星天体物理 · 物理学 2023-03-31 Veronica Allen , Martin A. Cordiner , Gilles Adande , Steven B. Charnley , Yi-Jehng Kuan , Eva Wirstrom

The accretion history of protostars remains widely mysterious even though it represents one of the best ways to understand the protostellar collapse that leads to the formation of stars. Molecular outflows are here used to characterize the…

We present multi-line and continuum observations of the circumstellar environment within 10^4 AU of a sample of protostars to investigate how the effects of outflows on their immediate environment changes over time. 12CO(1-0) emission…

天体物理学 · 物理学 2008-11-26 Hector G. Arce , Anneila I. Sargent

(Abridged) We present evidence that low-mass starless cores, the simplest units of star formation, are systematically differentiated in their chemical composition. Molecules including CO and CS almost vanish near the core centers, where the…

天体物理学 · 物理学 2008-11-26 M. Tafalla , P. C. Myers , P. Caselli , C. M. Walmsley , C. Comito

We study the CO and the radiocontinuum emission in an active galaxy to analyze the interplay between the central activity and the molecular gas. We present new high-resolution observations of the CO(1-0) and CO(2-1) emission lines, and 3.5…

天体物理学 · 物理学 2009-11-13 S. Leon , A. Eckart , S. Laine , J. K. Kotilainen , E. Schinnerer , S. -W. Lee , M. Krips , J. Reunanen , J. Scharwachter

As part of the ALMA Large Program "Early Planet Formation in Embedded Disks" (eDisk), 12CO (2 - 1) was observed towards 19 nearby low-mass protostars. Of these objects, 15 sources are found to show molecular outflow emission. Based on their…

We present high angular resolution ($2\rlap.{''}8 \times 1\rlap.{''}7$) SiO J=5$\to$4; $v=0$ line observations of the OMC1S region in the Orion Nebula made using the Submillimeter Array (SMA). We detect for the first time a cluster of four…

天体物理学 · 物理学 2008-11-26 Luis A. Zapata , Paul T. P. Ho , Luis F. Rodriguez , C. R. O'Dell , Qizhou Zhang , August Muench

We observed with the VLA, PdBI, and SMA the centimeter and millimeter continuum, N2H+(1-0), and CO(2-1) emission associated with a dusty cloud harboring a nascent cluster with intermediate-mass protostars. At centimeter wavelengths we found…

星系天体物理 · 物理学 2015-05-14 Aina Palau , A. Sanchez-Monge , G. Busquet , R. Estalella , Q. Zhang , P. T. P. Ho , M. T. Beltran , H. Beuther

We present molecular line imaging observations of three massive molecular outflow sources, G333.6-0.2, G333.1-0.4, and G332.8-0.5, all of which also show evidence for infall, within the G333 giant molecular cloud (GMC). All three are within…

星系天体物理 · 物理学 2015-09-14 N. Lo , B. Wiles , M. P. Redman , M. R. Cunningham , I. Bains , P. A. Jones , M. G. Burton , L. Bronfman

We present a study of outflow, infall, and rotation in a ~10^5 Lsun (solar luminosity) star-forming region, IRAS 18360-0537, with Submillimeter Array (SMA) and IRAM 30m observations. The 1.3 mm continuum map shows a 0.5 pc dust ridge, of…

星系天体物理 · 物理学 2015-06-05 Keping Qiu , Qizhou Zhang , Henrik Beuther , Cassandra Fallscheer

Context. Outflows provide indirect means to get an insight on diverse star formation associated phenomena. On scales of individual protostellar cores, outflows combined with intrinsic core properties can be used to study the mass…

星系天体物理 · 物理学 2015-05-19 O. Dionatos , B. Nisini , C. Codella , T. Giannini

CRL 618 is a well-studied pre-planetary nebula. It has multiple highly collimated optical lobes, fast molecular outflows along the optical lobes, and an extended molecular envelope that consists of a dense torus in the equator and a tenuous…