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THE ORIGIN OF DOUBLE-PEAKED NARROW LINES IN ACTIVE GALACTIC NUCLEI. I. VERY LARGE ARRAY DETECTIONS OF DUAL AGNs AND AGN OUTFLOWS
We have examined a subset of 18 active galactic nuclei (AGNs) drawn from a sample of 81 galaxies that possess double-peaked narrow optical emission line spectra in the Sloan Digital Sky Survey, have 2 optical AGN emission components separated by >0".2, and are detected in the Faint Images of...
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Published in: | The Astrophysical journal 2015-11, Vol.813 (2) |
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description | We have examined a subset of 18 active galactic nuclei (AGNs) drawn from a sample of 81 galaxies that possess double-peaked narrow optical emission line spectra in the Sloan Digital Sky Survey, have 2 optical AGN emission components separated by >0".2, and are detected in the Faint Images of the Radio Sky at Twenty-centimeters survey. Without follow-up observations, the sources of the double-peaked narrow emission lines are uncertain, and may be produced by kiloparsec-scale separation dual active supermassive black holes, AGN outflows, or disk rotation. In this work, we propose a new methodology to characterize double-peaked narrow emission line galaxies based on optical long-slit spectroscopy and high-resolution multi-band Very Large Array observations. The nature of the radio emission in the sample galaxies is varied. Of the 18 galaxies, we detect 2 compact flat-spectrum radio cores with projected spatial separations on the sky between 0.6 and 1.6 kpc in 3 galaxies: J1023+3243, J1158+3231, and J1623+0808. The two radio sources are spatially coincident with the two optical components of ionized gas with AGN-like line ratios, which confirms the presence of dual AGNs in these three galaxies. Dual AGNs account for only ~15% (3/18) of the double-peaked AGNs in our sample. Gas kinematics produce ~75% (13/18) of the double-peaked narrow emission lines, distributed in the following way: seven AGN wind-driven outflows, five radio-jet driven outflows, and one rotating narrow-line region. The remaining 10% (2/18) are ambiguous cases. Our method demonstrates the power of spatially resolved spectroscopy and high-resolution radio observations for the identification of AGN outflows and AGN pairs with angular separations as small as 0".18. |
doi_str_mv | 10.1088/0004-637X/813/2/103 |
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In this work, we propose a new methodology to characterize double-peaked narrow emission line galaxies based on optical long-slit spectroscopy and high-resolution multi-band Very Large Array observations. The nature of the radio emission in the sample galaxies is varied. Of the 18 galaxies, we detect 2 compact flat-spectrum radio cores with projected spatial separations on the sky between 0.6 and 1.6 kpc in 3 galaxies: J1023+3243, J1158+3231, and J1623+0808. The two radio sources are spatially coincident with the two optical components of ionized gas with AGN-like line ratios, which confirms the presence of dual AGNs in these three galaxies. Dual AGNs account for only ~15% (3/18) of the double-peaked AGNs in our sample. Gas kinematics produce ~75% (13/18) of the double-peaked narrow emission lines, distributed in the following way: seven AGN wind-driven outflows, five radio-jet driven outflows, and one rotating narrow-line region. The remaining 10% (2/18) are ambiguous cases. 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I. VERY LARGE ARRAY DETECTIONS OF DUAL AGNs AND AGN OUTFLOWS</title><title>The Astrophysical journal</title><description>We have examined a subset of 18 active galactic nuclei (AGNs) drawn from a sample of 81 galaxies that possess double-peaked narrow optical emission line spectra in the Sloan Digital Sky Survey, have 2 optical AGN emission components separated by >0".2, and are detected in the Faint Images of the Radio Sky at Twenty-centimeters survey. Without follow-up observations, the sources of the double-peaked narrow emission lines are uncertain, and may be produced by kiloparsec-scale separation dual active supermassive black holes, AGN outflows, or disk rotation. In this work, we propose a new methodology to characterize double-peaked narrow emission line galaxies based on optical long-slit spectroscopy and high-resolution multi-band Very Large Array observations. The nature of the radio emission in the sample galaxies is varied. Of the 18 galaxies, we detect 2 compact flat-spectrum radio cores with projected spatial separations on the sky between 0.6 and 1.6 kpc in 3 galaxies: J1023+3243, J1158+3231, and J1623+0808. The two radio sources are spatially coincident with the two optical components of ionized gas with AGN-like line ratios, which confirms the presence of dual AGNs in these three galaxies. Dual AGNs account for only ~15% (3/18) of the double-peaked AGNs in our sample. Gas kinematics produce ~75% (13/18) of the double-peaked narrow emission lines, distributed in the following way: seven AGN wind-driven outflows, five radio-jet driven outflows, and one rotating narrow-line region. The remaining 10% (2/18) are ambiguous cases. Our method demonstrates the power of spatially resolved spectroscopy and high-resolution radio observations for the identification of AGN outflows and AGN pairs with angular separations as small as 0".18.</description><subject>Active galactic nuclei</subject><subject>Arrays</subject><subject>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</subject><subject>BLACK HOLES</subject><subject>DETECTION</subject><subject>EMISSION SPECTRA</subject><subject>EMISSION SPECTROSCOPY</subject><subject>GALACTIC EVOLUTION</subject><subject>GALAXIES</subject><subject>GALAXY NUCLEI</subject><subject>JETS</subject><subject>Outflow</subject><subject>Radio</subject><subject>RESOLUTION</subject><subject>ROTATION</subject><subject>Separation</subject><subject>SKY</subject><subject>Sky surveys (astronomy)</subject><subject>STELLAR WINDS</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNqNkD1PwzAYhC0EEqXwC1gssbCk8Uc-7NGkbhphxShNWjpFaXBEUWkApzs_HRcQM9JJ7530vDccANcYTTBizEcIBV5E40efYeoTHyN6AkY4pMwLaBifgtEfcQ4urH05RsL5CHyWcwl1kaVZDvUMTnV1p6T3IMW9nMJcFIVeQZXlcgEdIJIyW0qYCnV0CcyrRMlsAp2WslhDJYpUQvck1nAqS-kgnS--eyuhoEhzC0U-PRqoq3Km9GpxCc66ZmfN1e8dg2omy2TuKZ1miVBeTwI-eJ3ZxJRGHOGGYsxIS7qo4R0zEe9C1GHCODLY5U0Qb-ImNDw2zBhDuxhF5gnTMbj56e3tsK1tux1M-9z2-71ph5qQkGBOqKNuf6i3j_79YOxQv25ta3a7Zm_6g61xzCJCkNv3H2gUckap0xe20HHt</recordid><startdate>20151110</startdate><enddate>20151110</enddate><creator>Muller-Sanchez, F</creator><creator>Comerford, J M</creator><creator>Nevin, R</creator><creator>Barrows, R S</creator><creator>Cooper, M C</creator><creator>Greene, J E</creator><scope>7TG</scope><scope>KL.</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>OTOTI</scope></search><sort><creationdate>20151110</creationdate><title>THE ORIGIN OF DOUBLE-PEAKED NARROW LINES IN ACTIVE GALACTIC NUCLEI. 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VERY LARGE ARRAY DETECTIONS OF DUAL AGNs AND AGN OUTFLOWS</title><author>Muller-Sanchez, F ; Comerford, J M ; Nevin, R ; Barrows, R S ; Cooper, M C ; Greene, J E</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-o249t-feb7336901a31182c2f6a9f8e69f50f12890e1f8eb47b7a5e97e8eee3f706ed13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Active galactic nuclei</topic><topic>Arrays</topic><topic>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</topic><topic>BLACK HOLES</topic><topic>DETECTION</topic><topic>EMISSION SPECTRA</topic><topic>EMISSION SPECTROSCOPY</topic><topic>GALACTIC EVOLUTION</topic><topic>GALAXIES</topic><topic>GALAXY NUCLEI</topic><topic>JETS</topic><topic>Outflow</topic><topic>Radio</topic><topic>RESOLUTION</topic><topic>ROTATION</topic><topic>Separation</topic><topic>SKY</topic><topic>Sky surveys (astronomy)</topic><topic>STELLAR WINDS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Muller-Sanchez, F</creatorcontrib><creatorcontrib>Comerford, J M</creatorcontrib><creatorcontrib>Nevin, R</creatorcontrib><creatorcontrib>Barrows, R S</creatorcontrib><creatorcontrib>Cooper, M C</creatorcontrib><creatorcontrib>Greene, J E</creatorcontrib><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><collection>OSTI.GOV</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Muller-Sanchez, F</au><au>Comerford, J M</au><au>Nevin, R</au><au>Barrows, R S</au><au>Cooper, M C</au><au>Greene, J E</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>THE ORIGIN OF DOUBLE-PEAKED NARROW LINES IN ACTIVE GALACTIC NUCLEI. I. VERY LARGE ARRAY DETECTIONS OF DUAL AGNs AND AGN OUTFLOWS</atitle><jtitle>The Astrophysical journal</jtitle><date>2015-11-10</date><risdate>2015</risdate><volume>813</volume><issue>2</issue><issn>0004-637X</issn><eissn>1538-4357</eissn><notes>ObjectType-Article-1</notes><notes>SourceType-Scholarly Journals-1</notes><notes>ObjectType-Feature-2</notes><notes>content type line 23</notes><abstract>We have examined a subset of 18 active galactic nuclei (AGNs) drawn from a sample of 81 galaxies that possess double-peaked narrow optical emission line spectra in the Sloan Digital Sky Survey, have 2 optical AGN emission components separated by >0".2, and are detected in the Faint Images of the Radio Sky at Twenty-centimeters survey. Without follow-up observations, the sources of the double-peaked narrow emission lines are uncertain, and may be produced by kiloparsec-scale separation dual active supermassive black holes, AGN outflows, or disk rotation. In this work, we propose a new methodology to characterize double-peaked narrow emission line galaxies based on optical long-slit spectroscopy and high-resolution multi-band Very Large Array observations. The nature of the radio emission in the sample galaxies is varied. Of the 18 galaxies, we detect 2 compact flat-spectrum radio cores with projected spatial separations on the sky between 0.6 and 1.6 kpc in 3 galaxies: J1023+3243, J1158+3231, and J1623+0808. The two radio sources are spatially coincident with the two optical components of ionized gas with AGN-like line ratios, which confirms the presence of dual AGNs in these three galaxies. Dual AGNs account for only ~15% (3/18) of the double-peaked AGNs in our sample. Gas kinematics produce ~75% (13/18) of the double-peaked narrow emission lines, distributed in the following way: seven AGN wind-driven outflows, five radio-jet driven outflows, and one rotating narrow-line region. The remaining 10% (2/18) are ambiguous cases. Our method demonstrates the power of spatially resolved spectroscopy and high-resolution radio observations for the identification of AGN outflows and AGN pairs with angular separations as small as 0".18.</abstract><cop>United States</cop><doi>10.1088/0004-637X/813/2/103</doi></addata></record> |
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subjects | Active galactic nuclei Arrays ASTROPHYSICS, COSMOLOGY AND ASTRONOMY BLACK HOLES DETECTION EMISSION SPECTRA EMISSION SPECTROSCOPY GALACTIC EVOLUTION GALAXIES GALAXY NUCLEI JETS Outflow Radio RESOLUTION ROTATION Separation SKY Sky surveys (astronomy) STELLAR WINDS |
title | THE ORIGIN OF DOUBLE-PEAKED NARROW LINES IN ACTIVE GALACTIC NUCLEI. I. VERY LARGE ARRAY DETECTIONS OF DUAL AGNs AND AGN OUTFLOWS |
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