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Identification of a collapsing protostar
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Walmsley, C. M. Zhou, Shudong Evans II, Neal J. Kompe, Carsten |
| Copyright Year | 1994 |
| Description | The globular molecular cloud B335 contains a single, deeply embedded far-infrared source. Our recent observations of H2CO and CS lines toward this source provide direct kinematic evidence for collapse. Both the intensity and detailed shape of the line profiles match those expected from inside-out collapse inside a radius of 0.036 pc. The collapse began about 1.5 x 10(exp 5) years ago, similar to the onset of the outflow. The mass accretion rate is about 10 times the outflow rate, and about 0.4 solar mass should have now accumulated in the star and disk. Because B335 rotates only, any disk would still be small (about 3 AU). The accretion luminosity should be adequate to power the observed luminosity. Consequently, we believe that B335 is indeed a collapsing protostar. |
| File Size | 334407 |
| Page Count | 7 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19980034685 |
| Archival Resource Key | ark:/13960/t40s4px2p |
| Language | English |
| Publisher Date | 1994-01-01 |
| Access Restriction | Open |
| Subject Keyword | Astrophysics Collapse Far Infrared Radiation Star Formation Stellar Mass Molecular Clouds Line Spectra Stellar Luminosity Formaldehyde Protostars Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
