Emission From Water Vapor And Absorption From Other Gases At 5-7.5 Mu M In Spitzer-Irs Spectra Of Protoplanetary Disks

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dc.contributor.utaustinauthorGreen, J.en_US
dc.creatorSargent, B. A.en_US
dc.creatorForrest, W.en_US
dc.creatorWatson, D. M.en_US
dc.creatorD'Alessio, P.en_US
dc.creatorCalvet, N.en_US
dc.creatorFurlan, E.en_US
dc.creatorKim, K. H.en_US
dc.creatorGreen, J.en_US
dc.creatorPontoppidan, K.en_US
dc.creatorRichter, I.en_US
dc.creatorTayrien, C.en_US
dc.date.accessioned2016-04-28T19:39:40Z
dc.date.available2016-04-28T19:39:40Z
dc.date.issued2014-09en
dc.description.abstractWe present spectra of 13 T Tauri stars in the Taurus-Auriga star-forming region showing emission in Spitzer Space Telescope Infrared Spectrograph 5-7.5 mu m spectra from water vapor and absorption from other gases in these stars' protoplanetary disks. Seven stars' spectra show an emission feature at 6.6 mu m due to the nu(2) = 1-0 bending mode of water vapor, with the shape of the spectrum suggesting water vapor temperatures >500 K, though some of these spectra also show indications of an absorption band, likely from another molecule. This water vapor emission contrasts with the absorption from warm water vapor seen in the spectrum of the FU Orionis star V1057 Cyg. The other 6 of the 13 stars have spectra showing a strong absorption band, peaking in strength at 5.6-5.7 mu m, which for some is consistent with gaseous formaldehyde (H2CO) and for others is consistent with gaseous formic acid (HCOOH). There are indications that some of these six stars may also have weak water vapor emission. Modeling of these stars' spectra suggests these gases are present in the inner few AU of their host disks, consistent with recent studies of infrared spectra showing gas in protoplanetary disks.en_US
dc.description.departmentAstronomyen_US
dc.description.sponsorshipJet Propulsion Laboratory, California Institute of Technology under NASA 1407en_US
dc.identifierdoi:10.15781/T2QZ54
dc.identifier.Filename2014_09_protoplanetarydisks.pdfen_US
dc.identifier.citationSargent, B. A., W. Forrest, Dan M. Watson, P. D'Alessio, N. Calvet, E. Furlan, K. H. Kim et al. "Emission from Water Vapor and Absorption from Other Gases at 5-7.5 ?m in Spitzer-IRS Spectra of Protoplanetary Disks." The Astrophysical Journal, Vol. 792, No. 2 (Sep., 2014): 83.en_US
dc.identifier.doi10.1088/0004-637x/792/2/83en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/2152/35053
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.relation.ispartofserialAstrophysical Journalen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.rights.restrictionOpenen_US
dc.subjectinfrared: starsen_US
dc.subjectprotoplanetary disksen_US
dc.subjectstars: pre-main sequenceen_US
dc.subjectstars:en_US
dc.subjectvariables: t tauri, herbig ae/been_US
dc.subjectt-tauri starsen_US
dc.subjectinfrared spectrograph surveyen_US
dc.subjectinterstellar ice analogsen_US
dc.subjectfu orionis objectsen_US
dc.subjectmolecular spectroscopic databaseen_US
dc.subjectyoungen_US
dc.subjectcircumstellar disksen_US
dc.subjectradiative-transfer modelsen_US
dc.subjectplanet formation regionen_US
dc.subjectcollisional excitationen_US
dc.subjectforming regionen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleEmission From Water Vapor And Absorption From Other Gases At 5-7.5 Mu M In Spitzer-Irs Spectra Of Protoplanetary Disksen_US
dc.typeArticleen_US

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