IUE Spectra of Seyvert 1 Galaxy NGC 7469- BLR Characteristics of NGC 7469
From the line ratios of Si III] 1892 to C III] 1909 (Feibelman & Aller 1987), we estimated the BLR electron densities and their changes of Seyfert 1 galaxy NGC 7469 using IUE spectra observed from June 11 to July 29, 1996 (Wanders et al. 1997). We separated blended Si III] and C III] lines using...
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| Format: | Article |
| Language: | English |
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The Korean Space Science Society
2005-09-01
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| Series: | Journal of Astronomy and Space Sciences |
| Subjects: | |
| Online Access: | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2005/v22n3/OJOOBS_2005_v22n3_187.pdf |
| _version_ | 1827362541507969024 |
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| author | Dong-Hoon Son Siek Hyung |
| author_facet | Dong-Hoon Son Siek Hyung |
| author_sort | Dong-Hoon Son |
| collection | DOAJ |
| description | From the line ratios of Si III] 1892 to C III] 1909 (Feibelman & Aller 1987), we estimated the BLR electron densities and their changes of Seyfert 1 galaxy NGC 7469 using IUE spectra observed from June 11 to July 29, 1996 (Wanders et al. 1997). We separated blended Si III] and C III] lines using the STARLINK/DIPSO and measured their fluxes within the error of 12.4% and 6.6%, respectively. Electron density fluctuated from 109.69 to 1010.93 during about two month period, i.e. 17.3 times density variation within 50 days. We also derived time delays from UV emission line variations relative to the continuum (at 1315Å): 2 days for C IV, 4 days for C III], 8 days for Si III]. This suggests that their stratified UV line emission regions are at 0.002 pc, 0.004 pc and 0.006 pc, respectively, from the central region. Based on the BLR sizes and their rotation velocities deduced from the line profiles, we estimate the central black hole mass as about 106 M⊙. |
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| format | Article |
| id | doaj.art-f98400410c3a4a57b4101fd860a3cfc1 |
| institution | Directory Open Access Journal |
| issn | 2093-5587 2093-1409 |
| language | English |
| last_indexed | 2024-03-08T07:29:44Z |
| publishDate | 2005-09-01 |
| publisher | The Korean Space Science Society |
| record_format | Article |
| series | Journal of Astronomy and Space Sciences |
| spelling | doaj.art-f98400410c3a4a57b4101fd860a3cfc12024-02-02T20:56:16ZengThe Korean Space Science SocietyJournal of Astronomy and Space Sciences2093-55872093-14092005-09-0122318719610.5140/JASS.2005.22.3.187IUE Spectra of Seyvert 1 Galaxy NGC 7469- BLR Characteristics of NGC 7469Dong-Hoon Son0Siek Hyung1Dept. of Astronomy and Space Science, Kyunghee UniversitySchool of Science Education (Astronomy), Chungbuk National UniversityFrom the line ratios of Si III] 1892 to C III] 1909 (Feibelman & Aller 1987), we estimated the BLR electron densities and their changes of Seyfert 1 galaxy NGC 7469 using IUE spectra observed from June 11 to July 29, 1996 (Wanders et al. 1997). We separated blended Si III] and C III] lines using the STARLINK/DIPSO and measured their fluxes within the error of 12.4% and 6.6%, respectively. Electron density fluctuated from 109.69 to 1010.93 during about two month period, i.e. 17.3 times density variation within 50 days. We also derived time delays from UV emission line variations relative to the continuum (at 1315Å): 2 days for C IV, 4 days for C III], 8 days for Si III]. This suggests that their stratified UV line emission regions are at 0.002 pc, 0.004 pc and 0.006 pc, respectively, from the central region. Based on the BLR sizes and their rotation velocities deduced from the line profiles, we estimate the central black hole mass as about 106 M⊙.http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2005/v22n3/OJOOBS_2005_v22n3_187.pdfSeyfert Galaxiesactive galactic nucleiultraviolet spectra |
| spellingShingle | Dong-Hoon Son Siek Hyung IUE Spectra of Seyvert 1 Galaxy NGC 7469- BLR Characteristics of NGC 7469 Journal of Astronomy and Space Sciences Seyfert Galaxies active galactic nuclei ultraviolet spectra |
| title | IUE Spectra of Seyvert 1 Galaxy NGC 7469- BLR Characteristics of NGC 7469 |
| title_full | IUE Spectra of Seyvert 1 Galaxy NGC 7469- BLR Characteristics of NGC 7469 |
| title_fullStr | IUE Spectra of Seyvert 1 Galaxy NGC 7469- BLR Characteristics of NGC 7469 |
| title_full_unstemmed | IUE Spectra of Seyvert 1 Galaxy NGC 7469- BLR Characteristics of NGC 7469 |
| title_short | IUE Spectra of Seyvert 1 Galaxy NGC 7469- BLR Characteristics of NGC 7469 |
| title_sort | iue spectra of seyvert 1 galaxy ngc 7469 blr characteristics of ngc 7469 |
| topic | Seyfert Galaxies active galactic nuclei ultraviolet spectra |
| url | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2005/v22n3/OJOOBS_2005_v22n3_187.pdf |
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