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dc.contributor.authorCouto, Guilherme dos Santospt_BR
dc.contributor.authorColina, Luispt_BR
dc.contributor.authorPiqueras López, Javierpt_BR
dc.contributor.authorStorchi-Bergmann, Thaisapt_BR
dc.contributor.authorArribas, Santiagopt_BR
dc.date.accessioned2018-05-11T02:33:24Zpt_BR
dc.date.issued2016pt_BR
dc.identifier.issn0004-6361pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/178125pt_BR
dc.description.abstractWe present deep SINFONI K-band integral field spectra of two submillimeter galaxy systems (SMG): BR 1202-0725 and J1000+0234, at z = 4:69 and 4:55; respectively. Spectra extracted for each object in the two systems do not show any signature of the [O ii] 3726, 29 Åemission-lines, placing upper flux limits of 3:9 and 2:5 10􀀀18 erg s􀀀1 cm􀀀2 for BR 1202-0725 and J1000+0234, respectively. Using the relation between the star formation rate (SFR) and the luminosity of the [O ii] doublet, we estimate unobscured SFR upper limits of 10􀀀15 M yr􀀀1 and 30􀀀40 M yr􀀀1 for the objects of the two systems, respectively. For the SMGs, these values are at least two orders of magnitude lower than those derived from SED and IR luminosities. The di erences on the SFR values would correspond to internal extinction of, at least, 3.4􀀀4.9 and 2.1􀀀3.6 mag in the visual for BR 1202-0725 and J1000+0234 SMGs, respectively. The upper limit for the [O ii]-derived SFR in one of the LAEs (Ly 2) in the BR1202-0725 system is at least one order of magnitude lower than the previous SFR derived from infrared tracers, while both estimates are in good agreement for Ly 1. The lower limits to the internal extinction in these two Lyman-alpha emitters are 0:6 mag and 1:3 mag, respectively. No evidence for [O ii] emission associated with Ly 1 is identified in our data, implying that residuals of the K-band sky emission lines after subtraction in mediumband imaging data could provide the adequate flux.en
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofAstronomy and astrophysics. Les Ulis. Vol. 594 (Oct. 2016), A74, 7 p.pt_BR
dc.rightsOpen Accessen
dc.subjectGalaxies: high-redshiften
dc.subjectGalaxias Starburstpt_BR
dc.subjectFormacao de estrelaspt_BR
dc.subjectGalaxies: individual: BR 1202–0725en
dc.subjectGalaxies: individual: J1000+0234en
dc.subjectDeslocamento para o vermelhopt_BR
dc.subjectGalaxies: starbursten
dc.subjectGalaxies: star formationen
dc.titleK band SINFONI spectra of two z ~ 5 submillimeter galaxy systems : upper limits to the unobscured star formation from [O II] optical emission line searchespt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001063434pt_BR
dc.type.originEstrangeiropt_BR


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