Period Changes of 23 Field RR Lyrae Stars
The secular period behavior of 23 field RR Lyrae stars is studied in order to determine if the observed period changes could be attributed, at least in the mean, to stellar evolution. The sample of stars is subdivided into two Oosterhoff groups based on the metallicity and period-shift. Despite the...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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The Korean Space Science Society
1994-12-01
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| Series: | Journal of Astronomy and Space Sciences |
| Online Access: | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/1994/v11n2/OJOOBS_1994_v11n2_154.pdf |
| _version_ | 1827362736106897408 |
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| author | Soo-Chang Rey Young-Wook Lee |
| author_facet | Soo-Chang Rey Young-Wook Lee |
| author_sort | Soo-Chang Rey |
| collection | DOAJ |
| description | The secular period behavior of 23 field RR Lyrae stars is studied in order to determine if the observed period changes could be attributed, at least in the mean, to stellar evolution. The sample of stars is subdivided into two Oosterhoff groups based on the metallicity and period-shift. Despite the small sample size, we found a distinct bias toward positive period changes in the group variables. The period changes of the group variables in globular clusters. This provides yet another support for the Lee, Demarque, and Zinn(1990) evolutionary models of RR Lyrae stars and their explanation of the Sandage period-shift effect. |
| first_indexed | 2024-03-08T07:33:43Z |
| format | Article |
| id | doaj.art-01ec16778f5c40308444877056f49314 |
| institution | Directory Open Access Journal |
| issn | 2093-5587 2093-1409 |
| language | English |
| last_indexed | 2024-03-08T07:33:43Z |
| publishDate | 1994-12-01 |
| publisher | The Korean Space Science Society |
| record_format | Article |
| series | Journal of Astronomy and Space Sciences |
| spelling | doaj.art-01ec16778f5c40308444877056f493142024-02-02T19:24:55ZengThe Korean Space Science SocietyJournal of Astronomy and Space Sciences2093-55872093-14091994-12-01112154164Period Changes of 23 Field RR Lyrae StarsSoo-Chang Rey0Young-Wook Lee1Yonsei University Observatory, Seoul 120-749, KoreaYonsei University Observatory, Seoul 120-749, KoreaThe secular period behavior of 23 field RR Lyrae stars is studied in order to determine if the observed period changes could be attributed, at least in the mean, to stellar evolution. The sample of stars is subdivided into two Oosterhoff groups based on the metallicity and period-shift. Despite the small sample size, we found a distinct bias toward positive period changes in the group variables. The period changes of the group variables in globular clusters. This provides yet another support for the Lee, Demarque, and Zinn(1990) evolutionary models of RR Lyrae stars and their explanation of the Sandage period-shift effect.http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/1994/v11n2/OJOOBS_1994_v11n2_154.pdf |
| spellingShingle | Soo-Chang Rey Young-Wook Lee Period Changes of 23 Field RR Lyrae Stars Journal of Astronomy and Space Sciences |
| title | Period Changes of 23 Field RR Lyrae Stars |
| title_full | Period Changes of 23 Field RR Lyrae Stars |
| title_fullStr | Period Changes of 23 Field RR Lyrae Stars |
| title_full_unstemmed | Period Changes of 23 Field RR Lyrae Stars |
| title_short | Period Changes of 23 Field RR Lyrae Stars |
| title_sort | period changes of 23 field rr lyrae stars |
| url | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/1994/v11n2/OJOOBS_1994_v11n2_154.pdf |
| work_keys_str_mv | AT soochangrey periodchangesof23fieldrrlyraestars AT youngwooklee periodchangesof23fieldrrlyraestars |