Spectropolarimetry of the Luminous Narrow‐Line Seyfert Galaxies IRAS 20181−2244 and IRAS 13224−3809
| Autor: | Claudia V. Rodrigues, Antonio Mário Magalhães, Laura E. Kay, F. Elizalde |
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| Rok vydání: | 1999 |
| Předmět: |
Physics
Scattering Astrophysics (astro-ph) High variability FOS: Physical sciences Balmer series Astronomy and Astrophysics Astrophysics Polarization (waves) 01 natural sciences Galaxy law.invention 010309 optics Telescope Wavelength symbols.namesake Space and Planetary Science law 0103 physical sciences symbols 010303 astronomy & astrophysics Spectrograph |
| Zdroj: | The Astrophysical Journal. 518:219-225 |
| ISSN: | 1538-4357 0004-637X |
| DOI: | 10.1086/307267 |
| Popis: | We observed the narrow-line Seyfert 1 galaxies IRAS 20181-2244 and IRAS 13324-3809 with a new spectropolarimeter on the RC spectrograph at the CTIO 4m telescope. Previously it had been suggested that IRAS 20181-2244 was a Type 2 QSO and thus might contain an obscured broad-line region which could be detected by the presence of broad Balmer lines in the polarized flux. We found the object to be polarized at about 2%, and constant with wavelength, (unlike most narrow-line Seyfert 1s), but with no evidence of broad Balmer lines in polarized flux. The spectropolarimetry indicates that the scattering material is inside the BLR. IRAS 13224-3809, notable for its high variability in X-ray and UV wavelengths, has a low polarization consistent with a Galactic interstellar origin. Comment: 19 pages using (AASTEX) aaspp4.sty and 5 postscript figures To be published in the Astrophysical Journal |
| Databáze: | OpenAIRE |
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