1. RRI Digital Repository
  2. 04. Astronomy and Astrophysics
  3. Research Papers (A&A)
Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/3489
Full metadata record
DC FieldValueLanguage
dc.contributor.authorDai, Xinyu-
dc.contributor.authorMathur, Smita-
dc.contributor.authorChartas, George-
dc.contributor.authorNair, Sunita-
dc.contributor.authorGarmire, Gordon P.-
dc.date.accessioned2008-04-15T10:25:11Z-
dc.date.available2008-04-15T10:25:11Z-
dc.date.issued2008-01-
dc.identifier.citationAstronomical Journal, 2008, Vol.135, p333en
dc.identifier.issnE-ISSN: 1538-3881-
dc.identifier.issnP-ISSN: 0004-6256-
dc.identifier.urihttp://hdl.handle.net/2289/3489-
dc.descriptionRestricted Access. Content older than 2 years remains open to all at the journal site(alternative location)en
dc.description.abstractWe present X-ray spectral analysis of five Chandra and XMM-Newton observations of the gravitationally-lensed blazar PKS 1830-211 from 2000 to 2004. We show that the X-ray absorption toward PKS 1830-211 is a variable, and the variable absorption is most likely to be intrinsic with amplitudes of ~2 × 1022–30 × 1022 cm-2 depending on whether or not the absorber is partially covering the X-ray source. Our results confirm the variable absorption observed previously, although interpreted differently, in a sequence of ASCA observations. This large variation in the absorption column density can be interpreted as outflows from the central engine in the polar direction, consistent with recent numerical models of inflow/outflows in active galaxy nuclei. In addition, it could possibly be caused by the interaction between the blazar jet and its environment, or the variation from the geometric configuration of the jet. While the spectra can also be fitted with a variable absorption at the lens redshift, we show that this model is unlikely. We also rule out the simple microlensing interpretation of variability which was previously suggested.en
dc.format.extent250174 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherIOP Publishing for the American Astronomical Societyen
dc.relation.urihttp://arxiv.org/abs/astro-ph/arXiv:0707.2053en
dc.relation.urihttp://dx.doi.org/10.1088/0004-6256/135/1/333en
dc.relation.urihttp://adsabs.harvard.edu/abs/2008AJ....135..333Den
dc.rights2008 American Astronomical Societyen
dc.subjectgravitational lensingen
dc.subjectquasars: individual (PKS 1830-211)en
dc.subjectX-rays: galaxiesen
dc.titleVariable x-ray absorption toward the gravitationally-lensed blazar PKS 1830-211en
dc.typeArticleen
Appears in Collections:Research Papers (A&A)

Files in This Item:
File Description SizeFormat 
2008 AJ_V135_p333.pdf
  Restricted Access		Restricted Access244.31 kBAdobe PDFView/Open Request a copy
Show simple item record


Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.