Astronomy and Astrophysics – Astronomy
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...198.4701p&link_type=abstract
American Astronomical Society, 198th AAS Meeting, #47.01; Bulletin of the American Astronomical Society, Vol. 33, p.848
Astronomy and Astrophysics
Astronomy
1
Scientific paper
The interacting binary TT Hya (B9.5Ve + K1III-IV) was observed throughout totality on 2001 March 8 with the FUSE spacecraft to investigate the physical conditions in its apparent bipolar jet. The presence of this polar flow was inferred from prior UV spectropolarimetry with the HST/FOS that revealed a polarization of ~30% in the in the faint continuum of the B star that is scattered into our line-of-sight by free electrons in this region. Four FUSE observations, each of ~2400 s duration, were obtained at phases 0.981--0.985 (centered on second contact), 0.991--0.995, 0.001--0.005, and 0.011--0.015 (just before the end of totality). A stellar-like continuum is observed longward of 1000 Å, upon which are seen prominent broad emission features of Fe III (UV1, λ λ 1122-32 Å) and C III (UV 4, λ 1176 Å) as well as possible weak O VI (UV1, λ λ 1032, 1038 Å) emission. The existence of the latter weak emission feature and possible variability in the emission lines and continuum throughout eclipse will be discussed. The stellar-like continuum must be scattered light from the circumstellar plasma, as the light from the B star is totally obscured. The FUSE observations will be compared with similar ones for V356 Sgr (B2V + A2II) and earlier ORFEUS-SPAS II observations of TT Hya taken earlier at three phases outside of eclipse. GJP is grateful for support from NASA Grant NAG5-8978.
Lynch D. E.
Peters Geraldine Joan
Polidan Ronald S.
No associations
LandOfFree
FUSE Observations of Accretion Processes in TT Hya 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 FUSE Observations of Accretion Processes in TT Hya, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and FUSE Observations of Accretion Processes in TT Hya will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1269273