Stellar Population Synthesis of the Elliptical Galaxy NGC 4649
We investigated population of the elliptical galaxy NGC 4649 using the spectral synthesis technique based on the linear program in the spectral regions between 3160Å to 10800Å. We used the spectral data of stars obtained by Gunn & Stryker (1983), and the integrated spectrum of NGC 4649 observed...
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| Format: | Article |
| Language: | English |
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The Korean Space Science Society
2001-12-01
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| Series: | Journal of Astronomy and Space Sciences |
| Subjects: | |
| Online Access: | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2001/v18n3/OJOOBS_2001_v18n3_175.pdf |
| _version_ | 1827361632076955648 |
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| author | Mun-Suk Chun Moon-Whan Gim Young-Jong Sohn |
| author_facet | Mun-Suk Chun Moon-Whan Gim Young-Jong Sohn |
| author_sort | Mun-Suk Chun |
| collection | DOAJ |
| description | We investigated population of the elliptical galaxy NGC 4649 using the spectral synthesis technique based on the linear program in the spectral regions between 3160Å to 10800Å. We used the spectral data of stars obtained by Gunn & Stryker (1983), and the integrated spectrum of NGC 4649 observed by Bertola et al. (1982). Among four models with different main sequence turn-off points, G8-K0V main sequence turn-off model is best fitted to the integrated spectrum of NGC 4649. We also found that super metal rich K giants are needed to describe the absorption lines in the long wavelength regions of integrated spectrum of NGC 4649. The mass to absolute light ratio obtained from the spectral synthesis is ~20 similar to those calculated dynamically. |
| first_indexed | 2024-03-08T07:08:02Z |
| format | Article |
| id | doaj.art-c7e8d1427b3f4535a3bc9fb365e40bbb |
| institution | Directory Open Access Journal |
| issn | 2093-5587 2093-1409 |
| language | English |
| last_indexed | 2024-03-08T07:08:02Z |
| publishDate | 2001-12-01 |
| publisher | The Korean Space Science Society |
| record_format | Article |
| series | Journal of Astronomy and Space Sciences |
| spelling | doaj.art-c7e8d1427b3f4535a3bc9fb365e40bbb2024-02-03T03:57:13ZengThe Korean Space Science SocietyJournal of Astronomy and Space Sciences2093-55872093-14092001-12-01183175190Stellar Population Synthesis of the Elliptical Galaxy NGC 4649Mun-Suk Chun0Moon-Whan Gim1Young-Jong Sohn2Dept. of Astronomy, Yonsei University, Seoul 120-749, KoreaDept. of Astronomy, Yonsei University, Seoul 120-749, KoreaCenter for Space Astrophysics, Yonsei University, Seoul 120-749, KoreaWe investigated population of the elliptical galaxy NGC 4649 using the spectral synthesis technique based on the linear program in the spectral regions between 3160Å to 10800Å. We used the spectral data of stars obtained by Gunn & Stryker (1983), and the integrated spectrum of NGC 4649 observed by Bertola et al. (1982). Among four models with different main sequence turn-off points, G8-K0V main sequence turn-off model is best fitted to the integrated spectrum of NGC 4649. We also found that super metal rich K giants are needed to describe the absorption lines in the long wavelength regions of integrated spectrum of NGC 4649. The mass to absolute light ratio obtained from the spectral synthesis is ~20 similar to those calculated dynamically.http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2001/v18n3/OJOOBS_2001_v18n3_175.pdfPOPULATION SYNTHESISELLIPTICAL GALAXYNGC 4649 |
| spellingShingle | Mun-Suk Chun Moon-Whan Gim Young-Jong Sohn Stellar Population Synthesis of the Elliptical Galaxy NGC 4649 Journal of Astronomy and Space Sciences POPULATION SYNTHESIS ELLIPTICAL GALAXY NGC 4649 |
| title | Stellar Population Synthesis of the Elliptical Galaxy NGC 4649 |
| title_full | Stellar Population Synthesis of the Elliptical Galaxy NGC 4649 |
| title_fullStr | Stellar Population Synthesis of the Elliptical Galaxy NGC 4649 |
| title_full_unstemmed | Stellar Population Synthesis of the Elliptical Galaxy NGC 4649 |
| title_short | Stellar Population Synthesis of the Elliptical Galaxy NGC 4649 |
| title_sort | stellar population synthesis of the elliptical galaxy ngc 4649 |
| topic | POPULATION SYNTHESIS ELLIPTICAL GALAXY NGC 4649 |
| url | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2001/v18n3/OJOOBS_2001_v18n3_175.pdf |
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