Three Long Period Variables in Sagittarius

Details Three Long Period Variables in Sagittarius Three Long Period Variables in Sagittarius

Jun 1972

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1972javso...1...70h&link_type=abstract

The Journal of the American Association of Variable Star Observers, vol. 1, no. 2, p. 70

Physics

2

Variables, Mira

Scientific paper

Several variables in VSF 193 in Sagittarius were studied during the suumer of 1972, three of which were of Mira type.
Variable B28* (18h 22m 55s, -22° 50.9', 1900) was discovered to have varying amplitude, ranging from magnitude 13.3 to 13.7 for its low and high maxima, to magnitude 15 at minima, with a period of 249 days.
The second star, B29* ( 18h 27m 17s, -20° 10.4', 1900) was discovered by Pamela Bonnell in 1971 on the Nantucket plates. The star varies from magnitude 11.6 to below 14.2. It appears to have a changing period. From about JD 18,000 to 33,000 a period of 345 days fits the data. From about 35,000 to the present the period appears to be 358 days. Whether this change is a single event or is part of a systematically varying period remains to be determined.
The third star B30* (18h 24m 35s, -28° 07.0', 1900) also has a changing period. discovered by Pamela Bonnell in 1971 on the Nantucket plates, it was found to vary from magnitude 12.3 to (14.9. The period appears to be 358 days for the interval JD 24,000 - 33,800 and 368 days for the span 35,000 to the present. The exact nature of the change of period is still not clear, however.
This work was done under the supervision of Dr. Dorrit Hoffleit and was funded under National Science foundation Grant, GP-30065.
Provisional designation for an as yet unpublished star.

Affiliated with

Also associated with

No associations

Rating

Three Long Period Variables in Sagittarius 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 Three Long Period Variables in Sagittarius, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Three Long Period Variables in Sagittarius will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1004439