CaII Quasar Absorbers: Statistics, Metals, Dust, and Associated Galaxies
We summarize results from our recent SDSS survey for CaII quasar absorbers. The survey finds 435 absorbers at z
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| Veröffentlicht in: | Proceedings of the International Astronomical Union 2015-08, Vol.11 (S315), p.1-2, Article E76 |
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| container_title | Proceedings of the International Astronomical Union |
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| creator | Turnshek, David A. Sardane, Gendith M. Rao, Sandhya M. |
| description | We summarize results from our recent SDSS survey for CaII quasar absorbers. The survey finds 435 absorbers at z |
| doi_str_mv | 10.1017/S1743921316008383 |
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strong ~ 19 kpc versus b
weak
45 kpc). Studies of CaII absorbers suggest links to molecular clouds, SFGs, and circumgalactic gas (CGG).</description><identifier>ISSN: 1743-9213</identifier><identifier>EISSN: 1743-9221</identifier><identifier>DOI: 10.1017/S1743921316008383</identifier><language>eng</language><publisher>Cambridge, UK: Cambridge University Press</publisher><subject>Absorption ; Abundance ; Astronomy ; Cosmic dust ; Galaxies ; Poster Papers ; Quasars ; Spectra ; Statistics</subject><ispartof>Proceedings of the International Astronomical Union, 2015-08, Vol.11 (S315), p.1-2, Article E76</ispartof><rights>Copyright © International Astronomical Union 2016</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c308t-9412bca6c073d87c9e1522cff9a7ca91bc0c06e681e6cec94dede7a1e24b6dbd3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.cambridge.org/core/product/identifier/S1743921316008383/type/journal_article$$EHTML$$P50$$Gcambridge$$H</linktohtml><link.rule.ids>164,314,776,780,27903,27904,55607</link.rule.ids></links><search><creatorcontrib>Turnshek, David A.</creatorcontrib><creatorcontrib>Sardane, Gendith M.</creatorcontrib><creatorcontrib>Rao, Sandhya M.</creatorcontrib><title>CaII Quasar Absorbers: Statistics, Metals, Dust, and Associated Galaxies</title><title>Proceedings of the International Astronomical Union</title><addtitle>Proc. IAU</addtitle><description>We summarize results from our recent SDSS survey for CaII quasar absorbers. The survey finds 435 absorbers at z<1.34, which corresponds to ~9 Gyrs of the Universe's history. Two CaII absorber populations are identified, which we call weak and strong. Metal abundance ratios derived from normalized composite spectra show that weak absorbers can be identified with halo-like gas, while strong absorbers are a mix of halo+disk-like gas. Consistent with these abundance ratio results, fluxed composites show that strong absorbers are ~6 times more reddened than weak absorbers (i.e., they contain more dust). Four individual examples of galaxies associated with CaII absorption are found in the SDSS images, and three are star forming galaxies (SFGs). Image composites show that galaxies associated with strong absorbers have mean luminosity-weighted impact parameters, b, which are ~2.4 times smaller than the weak absorbers (b
strong ~ 19 kpc versus b
weak
45 kpc). Studies of CaII absorbers suggest links to molecular clouds, SFGs, and circumgalactic gas (CGG).</description><subject>Absorption</subject><subject>Abundance</subject><subject>Astronomy</subject><subject>Cosmic dust</subject><subject>Galaxies</subject><subject>Poster Papers</subject><subject>Quasars</subject><subject>Spectra</subject><subject>Statistics</subject><issn>1743-9213</issn><issn>1743-9221</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNqNkU9LAzEUxIMoWKsfwNuCFw9dzUu2-eOtVG0LFZHqeckmb2VL261JFvTbu0uLiCJ4muHxm4HHEHIO9AooyOsFyIxrBhwEpYorfkB63SnVjMHhlwd-TE5CWFKaCcWHPTIdm9kseWpMMD4ZFaH2BfpwkyyiiVWIlQ2D5AGjWbV624Q4SMzGJaMQaluZiC6ZmJV5rzCckqOypfBsr33ycn_3PJ6m88fJbDyap5ZTFVOdASusEZZK7pS0GmHImC1LbaQ1GgpLLRUoFKCwaHXm0KE0gCwrhCsc75PLXe_W128Nhpivq2BxtTIbrJuQg9JcacE0_QcqpYJMMd2iFz_QZd34TftIRwEMBdcdBTvK-joEj2W-9dXa-I8caN7NkP-aoc3wfcasC1-5V_xW_WfqE7Nsh8M</recordid><startdate>20150801</startdate><enddate>20150801</enddate><creator>Turnshek, David A.</creator><creator>Sardane, Gendith M.</creator><creator>Rao, Sandhya M.</creator><general>Cambridge University Press</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7XB</scope><scope>88I</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>GNUQQ</scope><scope>H8D</scope><scope>HCIFZ</scope><scope>L7M</scope><scope>M2P</scope><scope>P5Z</scope><scope>P62</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>Q9U</scope><scope>7TG</scope><scope>KL.</scope></search><sort><creationdate>20150801</creationdate><title>CaII Quasar Absorbers: Statistics, Metals, Dust, and Associated Galaxies</title><author>Turnshek, David A. ; 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IAU</addtitle><date>2015-08-01</date><risdate>2015</risdate><volume>11</volume><issue>S315</issue><spage>1</spage><epage>2</epage><pages>1-2</pages><artnum>E76</artnum><issn>1743-9213</issn><eissn>1743-9221</eissn><abstract>We summarize results from our recent SDSS survey for CaII quasar absorbers. The survey finds 435 absorbers at z<1.34, which corresponds to ~9 Gyrs of the Universe's history. Two CaII absorber populations are identified, which we call weak and strong. Metal abundance ratios derived from normalized composite spectra show that weak absorbers can be identified with halo-like gas, while strong absorbers are a mix of halo+disk-like gas. Consistent with these abundance ratio results, fluxed composites show that strong absorbers are ~6 times more reddened than weak absorbers (i.e., they contain more dust). Four individual examples of galaxies associated with CaII absorption are found in the SDSS images, and three are star forming galaxies (SFGs). Image composites show that galaxies associated with strong absorbers have mean luminosity-weighted impact parameters, b, which are ~2.4 times smaller than the weak absorbers (b
strong ~ 19 kpc versus b
weak
45 kpc). Studies of CaII absorbers suggest links to molecular clouds, SFGs, and circumgalactic gas (CGG).</abstract><cop>Cambridge, UK</cop><pub>Cambridge University Press</pub><doi>10.1017/S1743921316008383</doi><tpages>2</tpages><oa>free_for_read</oa></addata></record> |
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| source | Cambridge University Press Journals Complete |
| subjects | Absorption Abundance Astronomy Cosmic dust Galaxies Poster Papers Quasars Spectra Statistics |
| title | CaII Quasar Absorbers: Statistics, Metals, Dust, and Associated Galaxies |
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