The radial velocity variations and evolutionary status of Delta LUPI

Details The radial velocity variations and evolutionary status of Delta LUPI The radial velocity variations and evolutionary status of Delta LUPI

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26as...76..121l&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 76, no. 1, Nov. 1988, p. 121-125.

Astronomy and Astrophysics

Astrophysics

5

Binary Stars, Cepheid Variables, Radial Velocity, Stellar Evolution, White Dwarf Stars, Main Sequence Stars, Mass Transfer, Stellar Mass, Stellar Rotation, Stellar Spectrophotometry

Scientific paper

The suspected β Cephei variable, δ Lupi, shows short term radial velocity variations of amplitude ≡4 km/s on a frequency of 5.046 c/d. These are superimposed on a longer term variation (16 - 19 days) of amplitude ≡20 km/s which indicates that the star is a binary system. δ Lupi has a large v sin i (210 km/s) and this combined with the small mass function constrains the system to an extreme mass ratio, q ≡ 0.1, if the primary is rotating parallel to the axis of the orbit. Less extreme values are possible if inclinations of up to ≡20 deg between the axes are allowed. This situation also holds for another rapidly rotating, binary, β Cephei star V986 Ophiuchi. Both systems may contain white dwarf secondaries.

Affiliated with

Also associated with

No associations

Rating

The radial velocity variations and evolutionary status of Delta LUPI 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 radial velocity variations and evolutionary status of Delta LUPI, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The radial velocity variations and evolutionary status of Delta LUPI will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1825160