The Wolf-Rayet binary V444 Cygni under the spectroscopic microscope. 1: Improved characteristics of the components and their interaction seen in He I

Details The Wolf-Rayet binary V444 Cygni under the spectroscopic microscope. 1: Improved characteristics of the components and their interaction seen in He I The Wolf-Rayet binary V444 Cygni under the spectroscopic microscope. 1: Improved characteristics of the components and their interaction seen in He I

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...422..810m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 422, no. 2, p. 810-822

Other

51

Absorption Spectra, Eclipsing Binary Stars, Emission Spectra, Light (Visible Radiation), Line Spectra, Orbital Elements, Radial Velocity, Stellar Mass, Wolf-Rayet Stars, Astronomical Spectroscopy, Bow Waves, Helium, O Stars, Shock Waves, Stellar Rotation

Scientific paper

A large accumulation of high signal-to-noise, moderate-resolution optical spectra has led to an unprecedented analysis of the radial velocities of emission and absorption lines in the close binary system V444 Cyg (WN 5 + O6 III-V). Improved orbital elements and masses are KWR = 332.6 +/- 3.0 km/s, KO = 108.4 +/- 4.7 km/s, a(sin (i)) = 35.8 +/- 0.4 solar radius, e = 0.036 +/- -0.009, MWR(sin (i))3) = 8.8 +/- 0.4 solar mass, MO((sin(i))3) = 26.3 +/- 1.0 solar mass. With i = 78.7 +/- 0.5 deg from previous studies, these yield a = 38.0 +/- 0.5 solar radius, MWR = 9.3 +/- 0.5 solar mass, MO = 27.9 +/- 1.1 solar mass. Other results include (1) the stable presence of short-period pulsations, P approximately equals 0.36 days in the O-C deviations from the W-R orbital curve based on the He II 4686 and 5412 radial velocities; (2) supersynchronous rotation of the O star by a factor approximately 2: ve(sin (i)) = 215 +/- 13 km/s, (3) sensitivity, especially of the He I 4471, 4922, and 5876 lines, to the presence of a wind-wind collision region in the form of a bow shock around the O star.

Affiliated with

Also associated with

No associations

Rating

The Wolf-Rayet binary V444 Cygni under the spectroscopic microscope. 1: Improved characteristics of the components and their interaction seen in He I 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 Wolf-Rayet binary V444 Cygni under the spectroscopic microscope. 1: Improved characteristics of the components and their interaction seen in He I, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Wolf-Rayet binary V444 Cygni under the spectroscopic microscope. 1: Improved characteristics of the components and their interaction seen in He I will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1014522