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dc.contributor.authorKoshida, Shintaro
dc.contributor.authorYoshii, Yuzuru
dc.contributor.authorKobayashi, Yukiyasu
dc.contributor.authorMinezaki, Takeo
dc.contributor.authorEnya, Keigo
dc.contributor.authorSuganuma, Masahiro
dc.contributor.authorTomita, Hiroyuki
dc.contributor.authorAoki, Tsutomu
dc.contributor.authorPeterson, Bruce A.
dc.date.accessioned2017-07-12T16:20:40Z
dc.date.available2017-07-12T16:20:40Z
dc.date.issued2017-06-14
dc.identifier.citationCalibration of AGN Reverberation Distance Measurements 2017, 842 (2):L13 The Astrophysical Journalen
dc.identifier.issn2041-8213
dc.identifier.doi10.3847/2041-8213/aa7553
dc.identifier.urihttp://hdl.handle.net/10150/624678
dc.description.abstractIn Yoshii et al., we described a new method for measuring extragalactic distances based on dust reverberation in active galactic nuclei (AGNs), and we validated our new method with Cepheid variable stars. In this Letter, we validate our new method with Type Ia supernovae (SNe Ia) that occurred in two of the AGN host galaxies during our AGN monitoring program: SN 2004bd in NGC 3786 and SN 2008ec in NGC 7469. Their multicolor light curves were observed and analyzed using two widely accepted methods for measuring SN distances, and the distance moduli derived are m= 33.47 +/- 0.15 for SN 2004bd and 33.83 +/- 0.07 for SN 2008ec. These results are used to obtain independently the distance measurement calibration factor, g. The g value obtained from the SN Ia discussed in this Letter is gSN= 10.61 +/- 0.50, which matches, within the range of 1s uncertainty, gDUST = 10.60, previously calculated ab initio in Yoshii et al. Having validated our new method for measuring extragalactic distances, we use our new method to calibrate reverberation distances derived from variations of Ha emission in the AGN broad-line region, extending the Hubble diagram to z approximate to 0.3 where distinguishing between cosmologies is becoming possible.
dc.description.sponsorshipCOE Research of the Ministry of Education, Science, Culture, and Sports of Japan [07CE2002]; [10041110]; [10304014]; [11740120]; [12640233]; [14047206]; [14253001]; [14540223]; [16740106]en
dc.language.isoenen
dc.publisherIOP PUBLISHING LTDen
dc.relation.urlhttp://stacks.iop.org/2041-8205/842/i=2/a=L13?key=crossref.4e21cc6845f8dd142a25fb4fda52d5a0en
dc.rights© 2017. The American Astronomical Society. All rights reserved.en
dc.subjectcosmological parametersen
dc.subjectgalaxies: distances and redshiftsen
dc.subjectgalaxies: individual (NGC 3786, NGC 7469)en
dc.subjectsupernovae: individual (SN 2004bd, SN 2008ec)en
dc.titleCalibration of AGN Reverberation Distance Measurementsen
dc.typeArticleen
dc.contributor.departmentUniv Arizona, Steward Observen
dc.identifier.journalThe Astrophysical Journal Lettersen
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en
dc.eprint.versionFinal published versionen
refterms.dateFOA2018-09-11T21:11:21Z
html.description.abstractIn Yoshii et al., we described a new method for measuring extragalactic distances based on dust reverberation in active galactic nuclei (AGNs), and we validated our new method with Cepheid variable stars. In this Letter, we validate our new method with Type Ia supernovae (SNe Ia) that occurred in two of the AGN host galaxies during our AGN monitoring program: SN 2004bd in NGC 3786 and SN 2008ec in NGC 7469. Their multicolor light curves were observed and analyzed using two widely accepted methods for measuring SN distances, and the distance moduli derived are m= 33.47 +/- 0.15 for SN 2004bd and 33.83 +/- 0.07 for SN 2008ec. These results are used to obtain independently the distance measurement calibration factor, g. The g value obtained from the SN Ia discussed in this Letter is gSN= 10.61 +/- 0.50, which matches, within the range of 1s uncertainty, gDUST = 10.60, previously calculated ab initio in Yoshii et al. Having validated our new method for measuring extragalactic distances, we use our new method to calibrate reverberation distances derived from variations of Ha emission in the AGN broad-line region, extending the Hubble diagram to z approximate to 0.3 where distinguishing between cosmologies is becoming possible.


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