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http://hdl.handle.net/2289/3961| Title: | An X-ray bright nucleus in the low-surface-brightness galaxy UGC 6614 |
| Authors: | Naik, S. Das, Mousumi Jain, Chetana Paul, Biswajit |
| Keywords: | galaxies: active galaxies: evolution galaxies: individual galaxies: nuclei spiral X-rays |
| Issue Date: | Jun-2010 |
| Publisher: | Wiley-Blackwell for the RAS |
| Citation: | Monthly Notices of the Royal Astronomical Society, 2010, Vol.404, p2056 |
| Abstract: | We report a study of the X-ray emission from the nuclear region of the low-surface-brightness (LSB) galaxy UGC 6614. Very little is known about the central objects in LSB galaxies, especially their X-ray properties and X-ray spectra. In this study we have used XMM–Newton archival data to study the characteristics of the X-ray spectrum and the X-ray flux variability of the active galactic nucleus (AGN) in the LSB galaxy UGC 6614. The nucleus of UGC 6614 is very bright in X-ray emission with an absorption-corrected 0.2–10.0 keV luminosity of ∼1.1 × 1042 erg s−1. The X-ray spectrum is found to be power-law type with a moderate column density. A short time-scale of intensity variation and large X-ray flux are indicative of the presence of a black hole at the centre of this galaxy. Using the method of excess variance, we have determined the black hole mass to be ∼0.12 × 106 M⊙. The X-ray spectral properties are similar to that of the Seyfert I-type AGNs. Our study thus demonstrates that although LSB galaxies are poor in star formation, they may harbour AGNs with X-ray properties comparable to that seen in more luminous spiral galaxies. |
| Description: | Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations) |
| URI: | http://hdl.handle.net/2289/3961 |
| ISSN: | 1365-2966 (Online) 0035-8711 |
| Alternative Location: | http://adsabs.harvard.edu/abs/2010MNRAS.404.2056N http://arxiv.org/abs/1001.5096 http://dx.doi.org/10.1111/j.1365-2966.2010.16423.x |
| Copyright: | 2010 The authors & the Royal Astronomical Society |
| Appears in Collections: | Research Papers (A&A) |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| 2010_MNRAS_404_2056.pdf Restricted Access | Restricted Access | 755.29 kB | Adobe PDF | View/Open Request a copy |
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