Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aspc..348..254b&link_type=abstract
Astrophysics in the Far Ultraviolet: Five Years of Discovery with FUSE ASP Conference Series, Vol. 348, Proceedings of the Confe
Astronomy and Astrophysics
Astrophysics
Scientific paper
The long-period (P= 10.36 yr) binary 31 Cygni (K4 Ib + B3 V) contains one of the brightest late-type supergiants in an eclipsing system. The hot companion, with a diameter about 3% of that of the supergiant, offers an unparalleled opportunity to probe the K star's outer atmosphere and wind at high spatial resolution. Observations of the ultraviolet spectrum are especially advantageous because there the primary's flux is negligible and the difficulties of disentangling composite spectra are avoided. Near eclipse, the sightline sweeps deep into the chromosphere of the supergiant and absorption features observed superimposed on the companion's early-type continuum can be used to map the supergiant's chromosphere in unprecedented detail.
The most recent eclipse of 31 Cyg occurred in mid-2003, a fortuitous event given the length of the orbital period compared to the expected lifetime of the FUSE mission. Observations of the 2003 eclipse were made at several epochs by the Cycle 4 GI program D123 during ingress, totality and egress phases. We present a summary of the observations and a preliminary empirical model of the chromosphere of 31 Cygni derived from these FUSE observations.
No associations
LandOfFree
The 2003 Eclipse of 31 Cygni 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 2003 Eclipse of 31 Cygni, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The 2003 Eclipse of 31 Cygni will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1860246