New calibrations for abundance determinations in H ii regions
Simple relations for deriving the oxygen abundance in H ii regions with intensities of the three strong emission lines R 2, R 3, and N 2 (R calibration) or S 2, R 3, and N 2 (S calibration) in their spectra are suggested. A sample of 313 reference H ii regions of the counterpart method (C method) is...
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Veröffentlicht in: | Monthly notices of the Royal Astronomical Society 2016-04, Vol.457 (4), p.3678-3692 |
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creator | Pilyugin, L. S. Grebel, E. K. |
description | Simple relations for deriving the oxygen abundance in H ii
regions with intensities of the three strong emission lines R
2, R
3, and N
2 (R calibration) or S
2, R
3, and N
2 (S calibration) in their spectra are suggested. A sample of 313 reference H ii regions of the counterpart method (C method) is used as calibrating data points. Relations for the determination of nitrogen abundances, the R calibration, are also constructed. We find that the oxygen and nitrogen abundances in high-metallicity H ii regions can be estimated using the intensities of the two strong lines R
2 and N
2 (or S
2 and N
2 for oxygen) only. The corresponding two-dimensional relations are provided. There are considerable advantages of the suggested calibration relations as compared to the existing ones. First, the oxygen and nitrogen abundances estimated through the suggested calibrations agree with the T
e
-based abundances within ∼0.1 dex over the whole metallicity range, i.e. the relative accuracy of the calibration-based abundances is 0.1 dex. Although we constructed distinct relations for high- and low-metallicity objects, the separation between these two can be simply obtained from the intensity of the N
2 line. Moreover, the applicability ranges of the high- and low-metallicity relations overlap for adjacent metallicities, i.e. the transition zone disappears. Secondly, the oxygen abundances produced by the two suggested calibrations are in remarkable agreement with each other. In fact, the R-based and S-based oxygen abundances agree within ∼0.05 dex in the majority of cases for more than three thousand H ii region spectra. |
doi_str_mv | 10.1093/mnras/stw238 |
format | Article |
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regions with intensities of the three strong emission lines R
2, R
3, and N
2 (R calibration) or S
2, R
3, and N
2 (S calibration) in their spectra are suggested. A sample of 313 reference H ii regions of the counterpart method (C method) is used as calibrating data points. Relations for the determination of nitrogen abundances, the R calibration, are also constructed. We find that the oxygen and nitrogen abundances in high-metallicity H ii regions can be estimated using the intensities of the two strong lines R
2 and N
2 (or S
2 and N
2 for oxygen) only. The corresponding two-dimensional relations are provided. There are considerable advantages of the suggested calibration relations as compared to the existing ones. First, the oxygen and nitrogen abundances estimated through the suggested calibrations agree with the T
e
-based abundances within ∼0.1 dex over the whole metallicity range, i.e. the relative accuracy of the calibration-based abundances is 0.1 dex. Although we constructed distinct relations for high- and low-metallicity objects, the separation between these two can be simply obtained from the intensity of the N
2 line. Moreover, the applicability ranges of the high- and low-metallicity relations overlap for adjacent metallicities, i.e. the transition zone disappears. Secondly, the oxygen abundances produced by the two suggested calibrations are in remarkable agreement with each other. In fact, the R-based and S-based oxygen abundances agree within ∼0.05 dex in the majority of cases for more than three thousand H ii region spectra.</description><identifier>ISSN: 0035-8711</identifier><identifier>EISSN: 1365-2966</identifier><identifier>DOI: 10.1093/mnras/stw238</identifier><language>eng</language><publisher>London: Oxford University Press</publisher><subject>Abundance ; Astronomy ; Calibration ; Construction ; H II regions ; Metallicity ; Metals ; Oxygen ; Spectra ; Spectral emissivity ; Spectrum analysis</subject><ispartof>Monthly notices of the Royal Astronomical Society, 2016-04, Vol.457 (4), p.3678-3692</ispartof><rights>2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society 2016</rights><rights>Copyright Oxford University Press, UK Apr 21, 2016</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c395t-9a0e34c9c0ca2406839aef6ad3617c34c4b8a7cc63f6d0759198f13ff27f65523</citedby><cites>FETCH-LOGICAL-c395t-9a0e34c9c0ca2406839aef6ad3617c34c4b8a7cc63f6d0759198f13ff27f65523</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,1604,27924,27925</link.rule.ids><linktorsrc>$$Uhttps://dx.doi.org/10.1093/mnras/stw238$$EView_record_in_Oxford_University_Press$$FView_record_in_$$GOxford_University_Press</linktorsrc></links><search><creatorcontrib>Pilyugin, L. S.</creatorcontrib><creatorcontrib>Grebel, E. K.</creatorcontrib><title>New calibrations for abundance determinations in H ii regions</title><title>Monthly notices of the Royal Astronomical Society</title><description>Simple relations for deriving the oxygen abundance in H ii
regions with intensities of the three strong emission lines R
2, R
3, and N
2 (R calibration) or S
2, R
3, and N
2 (S calibration) in their spectra are suggested. A sample of 313 reference H ii regions of the counterpart method (C method) is used as calibrating data points. Relations for the determination of nitrogen abundances, the R calibration, are also constructed. We find that the oxygen and nitrogen abundances in high-metallicity H ii regions can be estimated using the intensities of the two strong lines R
2 and N
2 (or S
2 and N
2 for oxygen) only. The corresponding two-dimensional relations are provided. There are considerable advantages of the suggested calibration relations as compared to the existing ones. First, the oxygen and nitrogen abundances estimated through the suggested calibrations agree with the T
e
-based abundances within ∼0.1 dex over the whole metallicity range, i.e. the relative accuracy of the calibration-based abundances is 0.1 dex. Although we constructed distinct relations for high- and low-metallicity objects, the separation between these two can be simply obtained from the intensity of the N
2 line. Moreover, the applicability ranges of the high- and low-metallicity relations overlap for adjacent metallicities, i.e. the transition zone disappears. Secondly, the oxygen abundances produced by the two suggested calibrations are in remarkable agreement with each other. In fact, the R-based and S-based oxygen abundances agree within ∼0.05 dex in the majority of cases for more than three thousand H ii region spectra.</description><subject>Abundance</subject><subject>Astronomy</subject><subject>Calibration</subject><subject>Construction</subject><subject>H II regions</subject><subject>Metallicity</subject><subject>Metals</subject><subject>Oxygen</subject><subject>Spectra</subject><subject>Spectral emissivity</subject><subject>Spectrum analysis</subject><issn>0035-8711</issn><issn>1365-2966</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqN0MtKxDAUBuAgCo6jOx-g4EIX1smlua1EBnWEQTe6DmmaSIY2HZOWwZ1bX9MnsWNn5UJcHTj_x4HzA3CK4BWCksyaEHWapW6DidgDE0QYzbFkbB9MICQ0FxyhQ3CU0gpCWBDMJuD60W4yo2tfRt35NqTMtTHTZR8qHYzNKtvZ2PiwC33IFl8fn95n0b5uN8fgwOk62ZPdnIKXu9vn-SJfPt0_zG-WuSGSdrnU0JLCSAONxgVkgkhtHdMVYYibISlKobkxjDhWQU4lksIh4hzmjlGKyRRcjHfXsX3rbepU45Oxda2DbfukkMC0KBgm6B8UCiYlJWKgZ7_oqu1jGB5RiEsEKeUFH9TlqExsU4rWqXX0jY7vCkG1LV79FK_G4gd-PvK2X_8tvwHc5oUc</recordid><startdate>20160421</startdate><enddate>20160421</enddate><creator>Pilyugin, L. S.</creator><creator>Grebel, E. K.</creator><general>Oxford University Press</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>7TG</scope><scope>KL.</scope></search><sort><creationdate>20160421</creationdate><title>New calibrations for abundance determinations in H ii regions</title><author>Pilyugin, L. S. ; Grebel, E. K.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c395t-9a0e34c9c0ca2406839aef6ad3617c34c4b8a7cc63f6d0759198f13ff27f65523</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Abundance</topic><topic>Astronomy</topic><topic>Calibration</topic><topic>Construction</topic><topic>H II regions</topic><topic>Metallicity</topic><topic>Metals</topic><topic>Oxygen</topic><topic>Spectra</topic><topic>Spectral emissivity</topic><topic>Spectrum analysis</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Pilyugin, L. S.</creatorcontrib><creatorcontrib>Grebel, E. K.</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><jtitle>Monthly notices of the Royal Astronomical Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Pilyugin, L. S.</au><au>Grebel, E. K.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>New calibrations for abundance determinations in H ii regions</atitle><jtitle>Monthly notices of the Royal Astronomical Society</jtitle><date>2016-04-21</date><risdate>2016</risdate><volume>457</volume><issue>4</issue><spage>3678</spage><epage>3692</epage><pages>3678-3692</pages><issn>0035-8711</issn><eissn>1365-2966</eissn><abstract>Simple relations for deriving the oxygen abundance in H ii
regions with intensities of the three strong emission lines R
2, R
3, and N
2 (R calibration) or S
2, R
3, and N
2 (S calibration) in their spectra are suggested. A sample of 313 reference H ii regions of the counterpart method (C method) is used as calibrating data points. Relations for the determination of nitrogen abundances, the R calibration, are also constructed. We find that the oxygen and nitrogen abundances in high-metallicity H ii regions can be estimated using the intensities of the two strong lines R
2 and N
2 (or S
2 and N
2 for oxygen) only. The corresponding two-dimensional relations are provided. There are considerable advantages of the suggested calibration relations as compared to the existing ones. First, the oxygen and nitrogen abundances estimated through the suggested calibrations agree with the T
e
-based abundances within ∼0.1 dex over the whole metallicity range, i.e. the relative accuracy of the calibration-based abundances is 0.1 dex. Although we constructed distinct relations for high- and low-metallicity objects, the separation between these two can be simply obtained from the intensity of the N
2 line. Moreover, the applicability ranges of the high- and low-metallicity relations overlap for adjacent metallicities, i.e. the transition zone disappears. Secondly, the oxygen abundances produced by the two suggested calibrations are in remarkable agreement with each other. In fact, the R-based and S-based oxygen abundances agree within ∼0.05 dex in the majority of cases for more than three thousand H ii region spectra.</abstract><cop>London</cop><pub>Oxford University Press</pub><doi>10.1093/mnras/stw238</doi><tpages>15</tpages><oa>free_for_read</oa></addata></record> |
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subjects | Abundance Astronomy Calibration Construction H II regions Metallicity Metals Oxygen Spectra Spectral emissivity Spectrum analysis |
title | New calibrations for abundance determinations in H ii regions |
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