Emergences of C iv narrow absorption troughs in the quasar SDSS J095254.10+021932.8
| Autor: | Zhi-Fu Chen, Wei-Rong Huang, You-Bing Li, Cai-Juan Pan, Mu-Sheng Li |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Physics
Cosmology and Nongalactic Astrophysics (astro-ph.CO) Partial coverage Astrophysics::High Energy Astrophysical Phenomena media_common.quotation_subject FOS: Physical sciences Astronomy Astronomy and Astrophysics Quasar Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Rest frame Space and Planetary Science Sky Ionization Outflow Emission spectrum Absorption (electromagnetic radiation) Astrophysics::Galaxy Astrophysics Astrophysics - Cosmology and Nongalactic Astrophysics media_common |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 434:3275-3282 |
| ISSN: | 1365-2966 0035-8711 |
| DOI: | 10.1093/mnras/stt1247 |
| Popis: | In this paper, we report on two C IV narrow absorption systems emerging from the spectrum of the quasar SDSS J095254.10 +021932.8, which are located at $z_{\rm abs}=2.0053$ and $z_{\rm abs}=1.8011$, respectively. These features have velocity offsets of $\rm \sim 13,800$ and $\rm \sim 34,700~km~s^{-1}$ with respect to the quasar, and show obviously partial coverage to the background emission sources. The two C IV absorption systems are imprinted on the spectrum obtained by the Sloan Digital Sky Survey (SDSS) III on 2011 March 25, which cannot be observed from the spectrum obtained by SDSS-I/II on 2000 December 30. The time interval of the two SDSS observations is 1186.4 d at the quasar rest frame. Because the continuum radiation, broad emission lines and mass accretion rate are stable for the two observations, together with the time interval of observations, we believe that the observed spectral variations are less likely to be caused by the changes in the ionization states of the absorbing gas or by a new outflow, arising from the situation where there was previously no outflow at all. Instead, they probably arise from the motions of multiple streaming gas across the sightline of the quasar. |
| Databáze: | OpenAIRE |
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