Journal article
PHL 6625: A Minor Merger-associated QSO Behind NGC 247
The Astrophysical journal, Vol.841(2), p.118
05/31/2017
DOI: 10.3847/1538-4357/aa72f3
Abstract
PHL 6625 is a luminous quasi-stellar object (QSO) at z = 0.3954 located behind the nearby galaxy NGC 247 (z = 0.0005). Hubble Space Telescope observations revealed an arc structure associated with it. We report on spectroscopic observations with the Very Large Telescope and multiwavelength observations from the radio to the X-ray band for the system, suggesting that PHL 6625 and the arc are a close pair of merging galaxies, instead of a strong gravitational lens system. The QSO host galaxy is estimated to be (4-28) × 1010 M☉ and the mass of the companion galaxy is estimated to be M* = (6.8 2.4) × 109 M☉, suggesting that this is a minor merger system. The QSO displays typical broad emission lines, from which a black hole mass of about (2-5) × 108 M☉ and an Eddington ratio of about 0.01-0.05 can be inferred. The system represents an interesting and rare case where a QSO is associated with an ongoing minor merger, analogous to Arp 142.
Details
- Title: Subtitle
- PHL 6625: A Minor Merger-associated QSO Behind NGC 247
- Creators
- Lian Tao - Tsinghua UniversityHua Feng - Tsinghua UniversityYue Shen - University of Illinois at Urbana–ChampaignLuis C Ho - Peking UniversityJunqiang Ge - National Astronomical ObservatoriesPhilip Kaaret - University of IowaShude Mao - University of ManchesterXin Liu - University of Illinois at Urbana–Champaign
- Resource Type
- Journal article
- Publication Details
- The Astrophysical journal, Vol.841(2), p.118
- DOI
- 10.3847/1538-4357/aa72f3
- ISSN
- 0004-637X
- eISSN
- 1538-4357
- Publisher
- Institute of Physics (IOP)
- Number of pages
- 9
- Language
- English
- Date published
- 05/31/2017
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984200028502771
Metrics
8 Record Views