Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...195.0214l&link_type=abstract
American Astronomical Society, 195th AAS Meeting, #02.14; Bulletin of the American Astronomical Society, Vol. 31, p.1369
Astronomy and Astrophysics
Astronomy
Scientific paper
DF Tau (HD 283654, M0V) is a classical T Tauri star (CTTS), with strong utraviolet emission lines that provide fascinating clues about flows near an actively forming star. On 1999 September 18, we observed DF Tau with HST/STIS, using the medium resolution echelle modes (E140M and E230M). The spectrum includes many emission lines from both low temperature plasma (e.g. O I, Fe II, H2) and high temperature plasma (e.g. He II, C IV, Si IV?). The combination of good resolution and complete FUV wavelength coverage makes it possible to explore the physical conditions giving rise to the observed fluorescence. The high temperature lines show strikingly sharp absorption edges in the blue wing, likely due to a wind with temperatures up to at least 105 K. The 2300--2900 Angstroms region contains many Fe II lines with P-Cygni shaped profiles, which constrain lower temperature regions of the outflow. We will report on the line of sight flows seen in both the low and high temperature lines and relate these flows to models of CTTS. This work is supported by a NASA grant to the University of Colorado.
Johns-Krull Christopher M.
Linsky Jeffrey L.
Valenti Jeff
No associations
LandOfFree
The amazing high resolution ultraviolet spectrum of DF Tauri does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The amazing high resolution ultraviolet spectrum of DF Tauri, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The amazing high resolution ultraviolet spectrum of DF Tauri will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1735331