Is U Aquarii a Thorne-Żytkow Object?

Details Is U Aquarii a Thorne-Żytkow Object? Is U Aquarii a Thorne-Żytkow Object?

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999apj...514..932v&link_type=abstract

The Astrophysical Journal, Volume 514, Issue 2, pp. 932-938.

Other

14

Nuclear Reactions, Nucleosynthesis, Abundances, Stars: Abundances, Stars: Individual: Constellation Name: U Aquarii, Stars: Variables: Other: (R Coronae Borealis)

Scientific paper

The R Coronae Borealis (RCB) star U Aqr was known to show an unusual abundance pattern with respect to the post-iron peak elements. The abundances of elements in the light s-process peak-Rb, Sr, Y, and Zr-are greatly enhanced, whereas elements representative of the heavy s-process peak, such as Ba, do not exhibit large abundance enhancements. Recent calculations of the abundances of elements formed by rapid proton capture in Thorne-Żytkow objects indicate that qualitatively the abundance pattern of post-iron peak elements in Thorne-Żytkow objects appeared to match that observed in U Aqr. New high-resolution spectra of U Aqr and two other stars are used to explore the possibility that U Aqr is a Thorne-Żytkow object. Our spectra show that on the basis of the light s-process elements, in particular the absence of an enhancement of Mo, Cu, and Zn, it does not appear that U Aqr is a good candidate for a Thorne-Żytkow object. However, the light s-process abundance pattern resembles that of Sakurai's star that has recently begun to show RCB characteristics. We suggest that these stars represent a possible source for the ``weak'' component of the solar system s-process distribution of heavy elements.

Affiliated with

Also associated with

No associations

Rating

Is U Aquarii a Thorne-Żytkow Object? 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 Is U Aquarii a Thorne-Żytkow Object?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Is U Aquarii a Thorne-Żytkow Object? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1429635