Absorption Line Gradients of an Elliptical Galaxy NGC 5322
Archival long-slit spectra, covering the wavelength range 4050Å - 5150Å, have been used to investigate the radial behavior of absorption line features (G4300, Fe4383, Ca4455, Fe44531, Fe4668, and Hα) of an eliptical galaxy NGC 5322. The heliocentric recession velocity of NGC 5322 has been derived as...
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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_105.pdf |
| _version_ | 1797368419169861632 |
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| author | Young-Jong Sohn Myung-Hyun Rhee Suk-Jin Yoon |
| author_facet | Young-Jong Sohn Myung-Hyun Rhee Suk-Jin Yoon |
| author_sort | Young-Jong Sohn |
| collection | DOAJ |
| description | Archival long-slit spectra, covering the wavelength range 4050Å - 5150Å, have been used to investigate the radial behavior of absorption line features (G4300, Fe4383, Ca4455, Fe44531, Fe4668, and Hα) of an eliptical galaxy NGC 5322. The heliocentric recession velocity of NGC 5322 has been derived as 1888+/-51 km s-1. Metallic absorption lines of NGC 5322 show significant radial gradients through the major axis. The minor axis shows much smaller radial metal line gradients than the major axis. The mean slopes of Fe line gradients to the major and minor axes of NGC 5322 were estimated as -0.433+/-0.064 and -0.242+/-0.096, respectively. Significant radial gradients of Hα absorption of NGC 5322 are also detected both on the major and minor axes. It is shown that the radial metallicity gradients in NGC 5322 are smaller than expected in a simple dissipative collapse model. Rather, dissipationless collapse, such as hierarchical merhing, could have contributed during the initial stage of the galaxy formation. |
| first_indexed | 2024-03-08T17:32:12Z |
| format | Article |
| id | doaj.art-e5e60d0233b7410ea0f4790f881cb9b1 |
| institution | Directory Open Access Journal |
| issn | 2093-5587 2093-1409 |
| language | English |
| last_indexed | 2024-03-08T17:32:12Z |
| publishDate | 1999-12-01 |
| publisher | The Korean Space Science Society |
| record_format | Article |
| series | Journal of Astronomy and Space Sciences |
| spelling | doaj.art-e5e60d0233b7410ea0f4790f881cb9b12024-01-02T15:05:58ZengThe Korean Space Science SocietyJournal of Astronomy and Space Sciences2093-55872093-14091999-12-01162105114Absorption Line Gradients of an Elliptical Galaxy NGC 5322Young-Jong Sohn0Myung-Hyun Rhee1Suk-Jin Yoon2Center for Space Astrophysics, Yonsei University, Seoul 120-749, KoreaCenter for Space Astrophysics, Yonsei University, Seoul 120-749, KoreaCenter for Space Astrophysics, Yonsei University, Seoul 120-749, KoreaArchival long-slit spectra, covering the wavelength range 4050Å - 5150Å, have been used to investigate the radial behavior of absorption line features (G4300, Fe4383, Ca4455, Fe44531, Fe4668, and Hα) of an eliptical galaxy NGC 5322. The heliocentric recession velocity of NGC 5322 has been derived as 1888+/-51 km s-1. Metallic absorption lines of NGC 5322 show significant radial gradients through the major axis. The minor axis shows much smaller radial metal line gradients than the major axis. The mean slopes of Fe line gradients to the major and minor axes of NGC 5322 were estimated as -0.433+/-0.064 and -0.242+/-0.096, respectively. Significant radial gradients of Hα absorption of NGC 5322 are also detected both on the major and minor axes. It is shown that the radial metallicity gradients in NGC 5322 are smaller than expected in a simple dissipative collapse model. Rather, dissipationless collapse, such as hierarchical merhing, could have contributed during the initial stage of the galaxy formation.http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/1999/v16n2/OJOOBS_1999_v16n2_105.pdf |
| spellingShingle | Young-Jong Sohn Myung-Hyun Rhee Suk-Jin Yoon Absorption Line Gradients of an Elliptical Galaxy NGC 5322 Journal of Astronomy and Space Sciences |
| title | Absorption Line Gradients of an Elliptical Galaxy NGC 5322 |
| title_full | Absorption Line Gradients of an Elliptical Galaxy NGC 5322 |
| title_fullStr | Absorption Line Gradients of an Elliptical Galaxy NGC 5322 |
| title_full_unstemmed | Absorption Line Gradients of an Elliptical Galaxy NGC 5322 |
| title_short | Absorption Line Gradients of an Elliptical Galaxy NGC 5322 |
| title_sort | absorption line gradients of an elliptical galaxy ngc 5322 |
| url | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/1999/v16n2/OJOOBS_1999_v16n2_105.pdf |
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