Chemical variation in molecular cloud cores in the Orion A cloud. II.
نویسندگان
چکیده
منابع مشابه
The shapes of molecular cloud cores in Orion
We investigate the intrinsic shapes of starless cores in the Orion GMC, using the prestellar core sample of Nutter & Ward-Thompson (2007), which is based on submillimeter SCUBA data. We employ a maximum-likelihood method to reconstruct the intrinsic distribution of ellipsoid axial ratios from observations of the axial ratios of projected plane-of-the-sky core ellipses. We find that, independent...
متن کاملCarbon Monoxide Depletion in Orion B Molecular Cloud Cores
We have observed several cloud cores in the Orion B (L1630) molecular cloud in the 2–1 transitions of CO, CO and CO. We use these data to show that a model where the cores consist of very optically thick CO clumps cannot explain their relative intensities. There is strong evidence that the CO is not very optically thick. The CO emission is compared to previous observations of dust continuum emi...
متن کاملThe Dynamics of Dense Cores in the Perseus Molecular Cloud II: the Relationship between Dense Cores and the Cloud
We utilize the extensive datasets available for the Perseus molecular cloud to analyze the relationship between the kinematics of small-scale dense cores and the larger structures in which they are embedded. The kinematic measures presented here can be used in conjunction with those discussed in our previous work as strong observational constraints that numerical simulations (or analytic models...
متن کاملYSOs in Collapsing Molecular Cloud Cores
The collapse of slowly rotating molecular cloud cores threaded by magnetic fields is investigated by high-resolution numerical simulation. Outflow formation in the collapsing cloud cores is also followed. In the models examined, the cloud core and parent cloud rotate rigidly and are initially threaded by a uniform magnetic field. The simulations show that the cloud core collapses along the magn...
متن کاملMagnetic Fields in Molecular Cloud Cores
Observations of magnetic field strengths imply that molecular cloud fragments are individually close to being in a magnetically critical state, even though both magnetic field and column density measurements range over two orders of magnitude. The turbulent pressure also approximately balances the self-gravitational pressure. These results together mean that the one-dimensional velocity dispers...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Publications of the Astronomical Society of Japan
سال: 2014
ISSN: 0004-6264,2053-051X
DOI: 10.1093/pasj/pst016