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Evidence for Inflow in High-Mass Star-Forming Clumps
Evidence for Inflow in High-Mass Star-Forming Clumps
2011/10/17
We analyze the HCO+ 3-2 and H13CO+ 3-2 line profiles of 27 high-mass star-forming regions to identify asymmetries that are suggestive of mass inflow. Three quantitative measures of line asymmetry are ...
A Lower Limit on the Halo Mass to form Supermassive Black Holes
black hole physics — hydrodynamics— galaxies: nuclei—accretion:accretion discs
2011/10/11
We consider a scenario where supermassive black holes form through direct accumulation of gas at the centre of proto-galaxies. In the first stage, the accumulated gas forms a super-massive star whose ...
On the Detection of (Habitable) Super-Earths Around Low-Mass Stars Using Kepler and Transit Timing Variation Method
Planetary Systems
2011/10/9
We present the results of an extensive study of the detectability of Earth-sized planets and super-Earths in the habitable zones of cool and low-mass stars using transit timing variation method. We ha...
Nonradial and nonpolytropic astrophysical outflows IX. Modeling T Tauri jets with a low mass-accretion rate
MHD, Stars: pre-main sequence, Stars: winds, outfl ows, Stars: mass-loss, Stars: rotation, ISM
2011/10/8
Context: A large sample of T Tauri stars exhibits optical jets, approximately half of which rotate slowly, only at ten per cent of their breakup velocity. The disk-locking mechanism has been shown to ...
Investigations of mass segregation are of vital interest for the understanding of the formation and dynamical evolution of stellar systems on a wide range of spatial scales. Our method is based on the...
Evidence for Pre-SN Mass Loss in the Galactic SNR 3C 58
Pre-SN Mass Loss Galactic SNR 3C 58
2009/6/30
Evidence for Pre-SN Mass Loss in the Galactic SNR 3C 58。
The maternities of high-mass stars。
Low mass dark matter halos in voids。
The Mass-Density Profiles of Low Surface Brightness Galaxies
Mass-Density Profiles Low Surface Brightness Galaxies
2009/6/11
The Mass-Density Profiles of Low Surface Brightness Galaxies。
THE TOTAL MASS OF THE EARLY-TYPE GALAXY NGC 4649 （M60）
Gravitation-Galaxies elliptical and lenticular, cD-Galaxies kine-matics and dynamics-Galaxies: individual NGC 4649 Cosmology dark matter
2009/1/15
In this paper the problem of the total mass and the total mass-to-
light ratio of the early-type galaxy NGC 4649 (M60) is analyzed. Use is made of two
independent techniques: the X-ray methodology w...