Loading…
X-ray Insights into the Physics of Mini-BAL Quasar Outflows
We examine the ultraviolet and X-ray properties of 256 radio-quiet Sloan Digital Sky Survey quasars (QSOs) observed in X-rays with Chandra and/or XMM-Newton in order to study the relationship between QSOs with broad C IV absorption lines (BALs; width >2000 km s-1) and those with C IV mini-BALs (h...
Saved in:
| Published in: | The Astrophysical journal 2009-05, Vol.696 (1), p.924-940 |
|---|---|
| Main Authors: | , , , |
| Format: | Article |
| Language: | English |
| Subjects: | |
| Citations: | Items that this one cites Items that cite this one |
| Online Access: | Get full text |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| cited_by | cdi_FETCH-LOGICAL-c461t-1852c44d3b0ecca09f8f6b16ac562eca784bfbc70d634d31eda95f96e7c9b3ae3 |
|---|---|
| cites | cdi_FETCH-LOGICAL-c461t-1852c44d3b0ecca09f8f6b16ac562eca784bfbc70d634d31eda95f96e7c9b3ae3 |
| container_end_page | 940 |
| container_issue | 1 |
| container_start_page | 924 |
| container_title | The Astrophysical journal |
| container_volume | 696 |
| creator | Gibson, Robert R Brandt, W. N Gallagher, S. C Schneider, Donald P |
| description | We examine the ultraviolet and X-ray properties of 256 radio-quiet Sloan Digital Sky Survey quasars (QSOs) observed in X-rays with Chandra and/or XMM-Newton in order to study the relationship between QSOs with broad C IV absorption lines (BALs; width >2000 km s-1) and those with C IV mini-BALs (here defined to have widths of 1000-2000 km s-1). Our sample includes 42 BAL and 48 mini-BAL QSOs. The relative X-ray brightness and hard spectral slopes of the mini-BAL population are, on average, intermediate between those of BAL and non-BAL QSOs, as might be expected if narrower and broader absorption line outflows are physically related. However, a significant population of mini-BALs has outflow velocities higher than would be expected for BAL QSOs of the same relative X-ray brightness. Consistently strong X-ray absorption is apparently not required to accelerate at least some mini-BALs to high outflow velocities. Assuming the mini-BAL features are correctly attributed to intrinsic C IV absorption, we suggest that their observed properties may be explained if mini-BALs are 'seeds' that can be accelerated to form BALs when sufficient X-ray shielding is present. We also examine several QSOs with broad C IV absorption that have been recently reported to be unusually X-ray bright. Such cases are frequently mini-BAL QSOs, which, as a population, are generally brighter in X-rays than BAL QSOs. Pointed XMM-Newton observations also suggest that these sources (or unresolved neighbors) may have been previously observed in a high-flux state. |
| doi_str_mv | 10.1088/0004-637X/696/1/924 |
| format | article |
| fullrecord | <record><control><sourceid>proquest_pasca</sourceid><recordid>TN_cdi_proquest_miscellaneous_20552159</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>20552159</sourcerecordid><originalsourceid>FETCH-LOGICAL-c461t-1852c44d3b0ecca09f8f6b16ac562eca784bfbc70d634d31eda95f96e7c9b3ae3</originalsourceid><addsrcrecordid>eNqN0F1LwzAUBuAgCs7pL_CmNyoI3fLdBq90-DGYTEFhdyFNExfp2pq0yP69rRu7UcSrw4HnvHBeAE4RHCGYpmMIIY05SRZjLvgYjQWme2CAGEljSliyDwY7cQiOQnjvVyzEAFwtYq_W0bQM7m3ZhMiVTRU1SxM9LdfB6RBVNnp0pYtvrmfRc6uC8tG8bWxRfYZjcGBVEczJdg7B693ty-Qhns3vp5PrWawpR02MUoY1pTnJoNFaQWFTyzPElWYcG62SlGY20wnMOekUMrkSzApuEi0yogwZgotNbu2rj9aERq5c0KYoVGmqNsik_5EhTDt5_qfEkDGMmOgg2UDtqxC8sbL2bqX8WiIo-0pl35DsC5NdpRJJ8R1_to1XQavCelVqF3anGHGeigR1brRxrqr_GXz58-AXKOvcki86epDF</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>20552159</pqid></control><display><type>article</type><title>X-ray Insights into the Physics of Mini-BAL Quasar Outflows</title><source>EZB Electronic Journals Library</source><creator>Gibson, Robert R ; Brandt, W. N ; Gallagher, S. C ; Schneider, Donald P</creator><creatorcontrib>Gibson, Robert R ; Brandt, W. N ; Gallagher, S. C ; Schneider, Donald P</creatorcontrib><description>We examine the ultraviolet and X-ray properties of 256 radio-quiet Sloan Digital Sky Survey quasars (QSOs) observed in X-rays with Chandra and/or XMM-Newton in order to study the relationship between QSOs with broad C IV absorption lines (BALs; width >2000 km s-1) and those with C IV mini-BALs (here defined to have widths of 1000-2000 km s-1). Our sample includes 42 BAL and 48 mini-BAL QSOs. The relative X-ray brightness and hard spectral slopes of the mini-BAL population are, on average, intermediate between those of BAL and non-BAL QSOs, as might be expected if narrower and broader absorption line outflows are physically related. However, a significant population of mini-BALs has outflow velocities higher than would be expected for BAL QSOs of the same relative X-ray brightness. Consistently strong X-ray absorption is apparently not required to accelerate at least some mini-BALs to high outflow velocities. Assuming the mini-BAL features are correctly attributed to intrinsic C IV absorption, we suggest that their observed properties may be explained if mini-BALs are 'seeds' that can be accelerated to form BALs when sufficient X-ray shielding is present. We also examine several QSOs with broad C IV absorption that have been recently reported to be unusually X-ray bright. Such cases are frequently mini-BAL QSOs, which, as a population, are generally brighter in X-rays than BAL QSOs. Pointed XMM-Newton observations also suggest that these sources (or unresolved neighbors) may have been previously observed in a high-flux state.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.1088/0004-637X/696/1/924</identifier><identifier>CODEN: ASJOAB</identifier><language>eng</language><publisher>Bristol: IOP Publishing</publisher><subject>Astronomy ; Earth, ocean, space ; Exact sciences and technology</subject><ispartof>The Astrophysical journal, 2009-05, Vol.696 (1), p.924-940</ispartof><rights>2009 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c461t-1852c44d3b0ecca09f8f6b16ac562eca784bfbc70d634d31eda95f96e7c9b3ae3</citedby><cites>FETCH-LOGICAL-c461t-1852c44d3b0ecca09f8f6b16ac562eca784bfbc70d634d31eda95f96e7c9b3ae3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,786,790,27957,27958</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=21668971$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Gibson, Robert R</creatorcontrib><creatorcontrib>Brandt, W. N</creatorcontrib><creatorcontrib>Gallagher, S. C</creatorcontrib><creatorcontrib>Schneider, Donald P</creatorcontrib><title>X-ray Insights into the Physics of Mini-BAL Quasar Outflows</title><title>The Astrophysical journal</title><description>We examine the ultraviolet and X-ray properties of 256 radio-quiet Sloan Digital Sky Survey quasars (QSOs) observed in X-rays with Chandra and/or XMM-Newton in order to study the relationship between QSOs with broad C IV absorption lines (BALs; width >2000 km s-1) and those with C IV mini-BALs (here defined to have widths of 1000-2000 km s-1). Our sample includes 42 BAL and 48 mini-BAL QSOs. The relative X-ray brightness and hard spectral slopes of the mini-BAL population are, on average, intermediate between those of BAL and non-BAL QSOs, as might be expected if narrower and broader absorption line outflows are physically related. However, a significant population of mini-BALs has outflow velocities higher than would be expected for BAL QSOs of the same relative X-ray brightness. Consistently strong X-ray absorption is apparently not required to accelerate at least some mini-BALs to high outflow velocities. Assuming the mini-BAL features are correctly attributed to intrinsic C IV absorption, we suggest that their observed properties may be explained if mini-BALs are 'seeds' that can be accelerated to form BALs when sufficient X-ray shielding is present. We also examine several QSOs with broad C IV absorption that have been recently reported to be unusually X-ray bright. Such cases are frequently mini-BAL QSOs, which, as a population, are generally brighter in X-rays than BAL QSOs. Pointed XMM-Newton observations also suggest that these sources (or unresolved neighbors) may have been previously observed in a high-flux state.</description><subject>Astronomy</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><recordid>eNqN0F1LwzAUBuAgCs7pL_CmNyoI3fLdBq90-DGYTEFhdyFNExfp2pq0yP69rRu7UcSrw4HnvHBeAE4RHCGYpmMIIY05SRZjLvgYjQWme2CAGEljSliyDwY7cQiOQnjvVyzEAFwtYq_W0bQM7m3ZhMiVTRU1SxM9LdfB6RBVNnp0pYtvrmfRc6uC8tG8bWxRfYZjcGBVEczJdg7B693ty-Qhns3vp5PrWawpR02MUoY1pTnJoNFaQWFTyzPElWYcG62SlGY20wnMOekUMrkSzApuEi0yogwZgotNbu2rj9aERq5c0KYoVGmqNsik_5EhTDt5_qfEkDGMmOgg2UDtqxC8sbL2bqX8WiIo-0pl35DsC5NdpRJJ8R1_to1XQavCelVqF3anGHGeigR1brRxrqr_GXz58-AXKOvcki86epDF</recordid><startdate>20090501</startdate><enddate>20090501</enddate><creator>Gibson, Robert R</creator><creator>Brandt, W. N</creator><creator>Gallagher, S. C</creator><creator>Schneider, Donald P</creator><general>IOP Publishing</general><general>IOP</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>KL.</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20090501</creationdate><title>X-ray Insights into the Physics of Mini-BAL Quasar Outflows</title><author>Gibson, Robert R ; Brandt, W. N ; Gallagher, S. C ; Schneider, Donald P</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c461t-1852c44d3b0ecca09f8f6b16ac562eca784bfbc70d634d31eda95f96e7c9b3ae3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Astronomy</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Gibson, Robert R</creatorcontrib><creatorcontrib>Brandt, W. N</creatorcontrib><creatorcontrib>Gallagher, S. C</creatorcontrib><creatorcontrib>Schneider, Donald P</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Gibson, Robert R</au><au>Brandt, W. N</au><au>Gallagher, S. C</au><au>Schneider, Donald P</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>X-ray Insights into the Physics of Mini-BAL Quasar Outflows</atitle><jtitle>The Astrophysical journal</jtitle><date>2009-05-01</date><risdate>2009</risdate><volume>696</volume><issue>1</issue><spage>924</spage><epage>940</epage><pages>924-940</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><coden>ASJOAB</coden><notes>ObjectType-Article-1</notes><notes>SourceType-Scholarly Journals-1</notes><notes>ObjectType-Feature-2</notes><notes>content type line 23</notes><notes>ObjectType-Article-2</notes><notes>ObjectType-Feature-1</notes><abstract>We examine the ultraviolet and X-ray properties of 256 radio-quiet Sloan Digital Sky Survey quasars (QSOs) observed in X-rays with Chandra and/or XMM-Newton in order to study the relationship between QSOs with broad C IV absorption lines (BALs; width >2000 km s-1) and those with C IV mini-BALs (here defined to have widths of 1000-2000 km s-1). Our sample includes 42 BAL and 48 mini-BAL QSOs. The relative X-ray brightness and hard spectral slopes of the mini-BAL population are, on average, intermediate between those of BAL and non-BAL QSOs, as might be expected if narrower and broader absorption line outflows are physically related. However, a significant population of mini-BALs has outflow velocities higher than would be expected for BAL QSOs of the same relative X-ray brightness. Consistently strong X-ray absorption is apparently not required to accelerate at least some mini-BALs to high outflow velocities. Assuming the mini-BAL features are correctly attributed to intrinsic C IV absorption, we suggest that their observed properties may be explained if mini-BALs are 'seeds' that can be accelerated to form BALs when sufficient X-ray shielding is present. We also examine several QSOs with broad C IV absorption that have been recently reported to be unusually X-ray bright. Such cases are frequently mini-BAL QSOs, which, as a population, are generally brighter in X-rays than BAL QSOs. Pointed XMM-Newton observations also suggest that these sources (or unresolved neighbors) may have been previously observed in a high-flux state.</abstract><cop>Bristol</cop><pub>IOP Publishing</pub><doi>10.1088/0004-637X/696/1/924</doi><tpages>17</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0004-637X |
| ispartof | The Astrophysical journal, 2009-05, Vol.696 (1), p.924-940 |
| issn | 0004-637X 1538-4357 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_20552159 |
| source | EZB Electronic Journals Library |
| subjects | Astronomy Earth, ocean, space Exact sciences and technology |
| title | X-ray Insights into the Physics of Mini-BAL Quasar Outflows |
| url | http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-09-28T11%3A21%3A46IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_pasca&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=X-ray%20Insights%20into%20the%20Physics%20of%20Mini-BAL%20Quasar%20Outflows&rft.jtitle=The%20Astrophysical%20journal&rft.au=Gibson,%20Robert%20R&rft.date=2009-05-01&rft.volume=696&rft.issue=1&rft.spage=924&rft.epage=940&rft.pages=924-940&rft.issn=0004-637X&rft.eissn=1538-4357&rft.coden=ASJOAB&rft_id=info:doi/10.1088/0004-637X/696/1/924&rft_dat=%3Cproquest_pasca%3E20552159%3C/proquest_pasca%3E%3Cgrp_id%3Ecdi_FETCH-LOGICAL-c461t-1852c44d3b0ecca09f8f6b16ac562eca784bfbc70d634d31eda95f96e7c9b3ae3%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_pqid=20552159&rft_id=info:pmid/&rfr_iscdi=true |