scholarly journals Density and kinematics of the W49A cloud core

1991 ◽  
Vol 147 ◽  
pp. 494-495
Author(s):  
E. Serabyn ◽  
R. Güsten
Keyword(s):  
Molecular Cloud ◽  
Temperature Scale ◽  
Dense Core ◽  
Density Structure ◽  
Cloud Core

The dense core of the W49A molecular cloud (Miyawaki et al. 1986, Schloerb et al. 1987) has been mapped in 5 different transitions of CS and C34S, in order to determine its density structure. The three lower frequency transitions (CS J=3-2, CS J=5-4 and C34S J=5-4) were observed with the IRAM 30m telescope, and the two highest frequency transitions (CS J=7-6 and C34S J=7-6) with the Caltech Submillimeter Observatory. The beamsizes were in the range 12″ to 20″. As a calibration check, the CS J=7-6 line was observed with both telescopes, and was found to give a consistent temperature scale. The spectra at the peak of the emission are shown in Fig. 1.

scholarly journals Density and kinematics of the W49A cloud core

1991 ◽  
Vol 147 ◽  
pp. 494-495
Author(s):  
E. Serabyn ◽  
R. Güsten
Keyword(s):  
Molecular Cloud ◽  
Temperature Scale ◽  
Dense Core ◽  
Density Structure ◽  
Cloud Core

The dense core of the W49A molecular cloud (Miyawaki et al. 1986, Schloerb et al. 1987) has been mapped in 5 different transitions of CS and C34S, in order to determine its density structure. The three lower frequency transitions (CS J=3-2, CS J=5-4 and C34S J=5-4) were observed with the IRAM 30m telescope, and the two highest frequency transitions (CS J=7-6 and C34S J=7-6) with the Caltech Submillimeter Observatory. The beamsizes were in the range 12″ to 20″. As a calibration check, the CS J=7-6 line was observed with both telescopes, and was found to give a consistent temperature scale. The spectra at the peak of the emission are shown in Fig. 1.

scholarly journals COLLIDING FILAMENTS AND A MASSIVE DENSE CORE IN THE CYGNUS OB 7 MOLECULAR CLOUD

2014 ◽  
Vol 797 (1) ◽  
pp. 58 ◽  
Author(s):  
Kazuhito Dobashi ◽  
Tomoaki Matsumoto ◽  
Tomomi Shimoikura ◽  
Hiro Saito ◽  
Ko Akisato ◽  
...  
Keyword(s):  
Molecular Cloud ◽  
Dense Core

scholarly journals Dense core structure and fragmentation in the Rho Ophiuchi molecular cloud

1991 ◽  
Vol 147 ◽  
pp. 229-233
Author(s):  
Alwyn Wootten
Keyword(s):  
Star Formation ◽  
High Resolution ◽  
Molecular Cloud ◽  
Surface Density ◽  
Core Structure ◽  
Dense Core ◽  
Dense Cores ◽  
Rho Ophiuchi ◽  
Very High ◽  
Taurus Molecular Cloud

About a dozen distinct dense cores have been identified in the Rho Ophiuchi molecular cloud. The properties of these cores are summarized and compared to the properties of cores in the Taurus molecular cloud, a less efficient region of star formation, and in DR21(OH), a more massive region of star formation. The data are consistent with a picture in which more massive clouds have a higher surface density of cores, which in turn are more massive. The adjacent cores in L1689N have been studied with very high resolution; one has formed stars and one never has. The structure of these cores shows a tendency for duplicity of structures from the largest scales (1 pc) to the smallest (50 AU).

Molecular Cloud Core and CS Outflow Associated with Haro 4-255 FIR

1993 ◽  
Vol 419 ◽  
pp. 746 ◽  
Author(s):  
Ken'ichi Tatematsu ◽  
Tomofumi Umemoto ◽  
Yasuhiro Murata ◽  
Hua Chen ◽  
Naomi Hirano ◽  
...  
Keyword(s):  
Molecular Cloud ◽  
Cloud Core

Aperture synthesis observations of CO emission from the W3 molecular cloud core

1984 ◽  
Vol 285 ◽  
pp. L79 ◽  
Author(s):  
M. J. Claussen ◽  
G. L. Berge ◽  
G. M. Heiligman ◽  
R. B. Leighton ◽  
K. Y. Lo ◽  
...  
Keyword(s):  
Molecular Cloud ◽  
Aperture Synthesis ◽  
Co Emission ◽  
Cloud Core

scholarly journals An Interferometric Observation of the NGC 7538 Molecular Cloud Core

1994 ◽  
Vol 140 ◽  
pp. 257-257
Author(s):  
Osamu Kameya ◽  
Ryohei Kawabe ◽  
Koh-Ichiro Morita ◽  
Masato Ishiguro ◽  
Naomi Hirano
Keyword(s):  
Spatial Resolution ◽  
Molecular Cloud ◽  
High Spatial Resolution ◽  
Primary Beam ◽  
Detailed Structure ◽  
Field Center ◽  
Resolution Observation ◽  
Interferometric Observation ◽  
Cloud Core

A high-spatial-resolution observation of the NGC 7538 molecular cloud core has been performed with the Nobeyama Millimeter Array. We report on the detailed structure of the region including IRS1-3 complex and IRS11 based on the CS J = 1−0 line observational results.The observation was done in December, 1988. The field center was at R.A. (1950)=23h11m36.8s, Dec (1950)=61° 11′ 10″ which is between IRS1-3 complex and IRS11. The primary beam, 2.5’(FWHM), was large enough to cover both IRS1-3 complex and IRS11. We used 18 baselines, and the synthesized beam became 10.6″×10.4″ (natural weight).

scholarly journals Evidence from optical polarimetry for spiral structure in the magnetic field and cloud density around newly-formed stars

1987 ◽  
Vol 122 ◽  
pp. 129-130
Author(s):  
R.F. Warren-Smith ◽  
P. W. Draper ◽  
S. M. Scarrott
Keyword(s):  
Magnetic Field ◽  
Spiral Structure ◽  
Binary Star ◽  
Density Structure ◽  
Ccd Imaging ◽  
Protostellar Cloud ◽  
Binary Star System ◽  
The Magnetic Field ◽  
Cloud Material ◽  
Cloud Core

Deep CCD imaging of the Serpens bipolar nebula shows it to be surrounded by molecular cloud material having spiral density structure. Polarization mapping indicates that the magnetic field in this material also exhibits spiral structure and we interpret this as the remains of the magnetically-braked collapse of a protostellar cloud. A binary star system has formed in the cloud core.

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