Differential Time-Series CCD Photometry of BL Camelopardalis
Differential time-series observations of BL Camelopardalis classified as a double mode SX Phoenicis type variable were secured with a charge coupled device. The observed photometric data was reduced using the IRAF Package and the differential magnitudes were obtained through aperture photometry. The...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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The Korean Space Science Society
1999-12-01
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| Series: | Journal of Astronomy and Space Sciences |
| Online Access: | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/1999/v16n2/OJOOBS_1999_v16n2_241.pdf |
| _version_ | 1797368192679542784 |
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| author | Chulhee Kim Eun-Jeung Sim |
| author_facet | Chulhee Kim Eun-Jeung Sim |
| author_sort | Chulhee Kim |
| collection | DOAJ |
| description | Differential time-series observations of BL Camelopardalis classified as a double mode SX Phoenicis type variable were secured with a charge coupled device. The observed photometric data was reduced using the IRAF Package and the differential magnitudes were obtained through aperture photometry. The periods of BL Cam were analyzed with the Generalized Least-Square Method by Vanicek (1971) and the Fourier Decomposition Method. It was found that the first and second period of BL Cam were 0.0391 day and 0.0317 day respectively which lead the period ratio of P1/P0 = 0.81. This period ratio is much different from 0.78 determined by other investigators and also much more larger than that of other double-mode SX Phe type variables. In addition, this period ratio is much different from the value expected from the relation between the metallicity and period ratio. From these results, it can be confirmed that BL Cam is the most extreme case among all double-mode SX Phe type variables. |
| first_indexed | 2024-03-08T17:28:01Z |
| format | Article |
| id | doaj.art-c4ad39bd04714d1eb4d6dee48fbc3c7b |
| institution | Directory Open Access Journal |
| issn | 2093-5587 2093-1409 |
| language | English |
| last_indexed | 2024-03-08T17:28:01Z |
| publishDate | 1999-12-01 |
| publisher | The Korean Space Science Society |
| record_format | Article |
| series | Journal of Astronomy and Space Sciences |
| spelling | doaj.art-c4ad39bd04714d1eb4d6dee48fbc3c7b2024-01-02T17:39:57ZengThe Korean Space Science SocietyJournal of Astronomy and Space Sciences2093-55872093-14091999-12-01162241254Differential Time-Series CCD Photometry of BL CamelopardalisChulhee Kim0Eun-Jeung Sim1Department of Earth Science Education, Chonbuk National UniversityDepartment of Earth Science Education, Chonbuk National UniversityDifferential time-series observations of BL Camelopardalis classified as a double mode SX Phoenicis type variable were secured with a charge coupled device. The observed photometric data was reduced using the IRAF Package and the differential magnitudes were obtained through aperture photometry. The periods of BL Cam were analyzed with the Generalized Least-Square Method by Vanicek (1971) and the Fourier Decomposition Method. It was found that the first and second period of BL Cam were 0.0391 day and 0.0317 day respectively which lead the period ratio of P1/P0 = 0.81. This period ratio is much different from 0.78 determined by other investigators and also much more larger than that of other double-mode SX Phe type variables. In addition, this period ratio is much different from the value expected from the relation between the metallicity and period ratio. From these results, it can be confirmed that BL Cam is the most extreme case among all double-mode SX Phe type variables.http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/1999/v16n2/OJOOBS_1999_v16n2_241.pdf |
| spellingShingle | Chulhee Kim Eun-Jeung Sim Differential Time-Series CCD Photometry of BL Camelopardalis Journal of Astronomy and Space Sciences |
| title | Differential Time-Series CCD Photometry of BL Camelopardalis |
| title_full | Differential Time-Series CCD Photometry of BL Camelopardalis |
| title_fullStr | Differential Time-Series CCD Photometry of BL Camelopardalis |
| title_full_unstemmed | Differential Time-Series CCD Photometry of BL Camelopardalis |
| title_short | Differential Time-Series CCD Photometry of BL Camelopardalis |
| title_sort | differential time series ccd photometry of bl camelopardalis |
| url | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/1999/v16n2/OJOOBS_1999_v16n2_241.pdf |
| work_keys_str_mv | AT chulheekim differentialtimeseriesccdphotometryofblcamelopardalis AT eunjeungsim differentialtimeseriesccdphotometryofblcamelopardalis |