منابع مشابه
Magnetic fields in cometary globules – III. CG 12
We present results of optical linear polarization measurements of stars in the region of the relatively isolated cometary globule CG 12 in Centaurus at a galactic latitude b 21◦. A polarization map representing the geometry of the magnetic field in the cloud is produced. In the lower-density outer parts of the cloud, the field is more or less parallel to the cometary tail and other elongated st...
متن کاملCometary globules III . Triggered star formation in IC 1848
We present a multiwavelength study frommolecular and continuum observations of the cometary globule CG5 in the HII region IC1848. CG5 is associated with the luminous IRAS point source 02252+6120 (L= 1100 L ) and shows evidence for an energetic outflow and ongoing star formation (a cluster of low-mass stars has formed inside the cloud). CG5 is presently undergoing a second episode of photo-ionis...
متن کاملAn observational study of Cometary Globules near theRosette
Molecular line observations are reported of two regions containing small cometary globules at the edge of the Rosette Nebula. Observations of the CO, 13 CO and C 18 O J = 2?1 , and CO J = 4?3 molecular lines towards Globule 1, the most prominent of the group, show it has a well-developed head-tail structure, with a head diameter 0.4 pc, and a tail extending 1.3 pc behind it. The major axis of t...
متن کاملInvestigating Dusty Plasma of Cometary Coma with Nasa Stardust Data
Introduction: Harbingers of doom or prophesy for the ancient peoples of Earth, comets are now understood to be primordial fragments from our Solar System's birth composed of various ices and dust species. Among the questions surrounding comets and their elusive character are the properties and processes of the rarefied gasses and disperse dust that surround their solid nucleus. Dusty, or comple...
متن کاملThe Cometary Globules CG 30 / 31 / 38 in the Gum nebula A radio line spectroscopic investigation ?
We present radio line observations from the SEST. On the basis of 13 CO (J=1–0) measurements we estimate the H 2 mass associated with the globules CG 30/31A-C/38 to be ∼43 M. The gas kinetic temperature of the globules is in the range 5 to 14 K. Line wings seen in the 12 CO spectra as well as higher dipole moment molecules towards CG 30, indicate that a dense molecular outflow is present. Espec...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2008
ISSN: 0004-637X,1538-4357
DOI: 10.1086/593058