Astronomy and Astrophysics – Astronomy
Scientific paper
May 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....101.1821h&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 101, May 1991, p. 1821-1827.
Astronomy and Astrophysics
Astronomy
5
Astronomical Photometry, Eclipsing Binary Stars, Stellar Occultation, Electrophotometers, Interstellar Extinction, Light Curve, Ubv Spectra
Scientific paper
New UBV photoelectric photometry of Tau Persei obtained at 19 different observatories during its recent January 1989 eclipse is presented. Mideclipse occurred at JD 2 447 542.31 + or - 0.01. The resulting light curve, though not complete at all phases, is solved for the elements with the help of two quantities derived from spectroscopy: the eclipse is 84 percent total at mideclipse, and the ratio of the radii is 0.135 + or - 0.01. Radii relative to the semimajor axis are 0.0236 for the G5 giant and 0.0032 for the A2 star. With a reasonable total mass assumed, the absolute radii say the A2 star could be luminosity class V or somewhat evolved and the G5 star is between III and II but could be closer to II. The G5 giant is brighter than the A2 star by 1.72 mag in V and the color excess in B - V is 0.06 mag, both quantities consistent (within uncertainties) with earlier estimates of Ake (1986). The eclipse duration, from first to fourth contact, is 2.09 day. The orbital inclination is 88.74 deg, consistent with what McAlister derived from speckle interferometry. Because of the large (e = 0.73) eccentricity, there is no secondary eclipse at all.
Barksdale William S.
Curott David R.
Diethelm-Sutter Roger
Ells Jack
Frey Gary J.
No associations
LandOfFree
Worldwide photometry of the January 1989 Tau Persei eclipse 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 Worldwide photometry of the January 1989 Tau Persei eclipse, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Worldwide photometry of the January 1989 Tau Persei eclipse will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1035825