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Detection of accreting gas toward hd 45677: a newly recognized, herbig be proto-planetary system
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Shepherd, D. Perez, M. R. Schulte-Ladbeck, R. E. Bjorkman, K. S. Dewinter, D. The, P. S. Grady, C. A. |
| Copyright Year | 1993 |
| Description | We report detection of high velocity, accreting gas toward the Be star with IR excess and bipolar nebula, HD 45677. High velocity (+200 to +400 km/s), variable column density gas is visible in all IUE spectra from 1979-1992 in transitions of Si II, C II, Al III, Fe III, Si IV, and C IV. Low-velocity absorption profiles from low oscillator-strength transitions of Si II, Fe II, and Zn II exhibit double-peaked absorption profiles similar to those previously reported in optical spectra of FU Orionis objects. The UV absorption data, together with previously reported analyses of the IR excess and polarization of this object, suggest that HD 45677 is a massive, Herbig Be star with an actively accreting circumstellar, proto-planetary disk. |
| File Size | 530631 |
| Page Count | 15 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19940014815 |
| Archival Resource Key | ark:/13960/t6zw6cc2t |
| Language | English |
| Publisher Date | 1993-07-06 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Stellar Envelopes Stellar Mass Accretion B Stars Emission Spectra Stellar Evolution Absorption Spectra Ultraviolet Absorption Line Spectra Ultraviolet Astronomy Stellar Structure Massive Stars Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
