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Velocity Dispersions and Stellar Populations of the Most Compact and Msssive early-Type Galaxies at Redshift similar to 1

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dc.contributor.authorMartínez Manso, Jesús
dc.contributor.authorGuzmán, Rafael
dc.contributor.authorBarro, Guillermo
dc.contributor.authorCenarro, Javier
dc.contributor.authorPérez González, Pablo Guillermo
dc.contributor.authorSánchez Blázquez, Patricia
dc.contributor.authorTrujillo, Ignacio
dc.contributor.authorBalcells, Marc
dc.contributor.authorCardiel López, Nicolás
dc.contributor.authorHempel, Angela
dc.contributor.authorPrieto, Mercedes
dc.date.accessioned2023-06-20T03:47:06Z
dc.date.available2023-06-20T03:47:06Z
dc.date.issued2011-09-10
dc.description© 2011 The American Astronomical Society. This wor0k is partially funded by the Spanish MICINN under the Consolider-Ingenio 2010 Program grant CSD2006-00070: First Science with the GTC. J. M. M. acknowledges funding from a Graduate Alumni Fellowship at the University of Florida. The Spanish MICINN provides support to M. B., M. P., and A. H. through grant AYA2009-11137 and to J. G. through grant AYA2009-10368. Our observations were made with the GTC Telescope at the Spanish Observatorio del Roque de los Muchachos, which is managed by the Instituto de Astrofísica de Canarias. We are grateful to the personnel who took the observations and to Ana Matkovic for her help with the use of the REDucmE software. We also thank the anonymous referee for useful comments that improved the presentation of this Letter.
dc.description.abstractWe present Gran-Telescopio-Canarias/OSIRIS optical spectra of four of the most compact and massive early-type galaxies (ETGs) in the Groth Strip Survey at redshift z similar to 1, with effective radii R-e = 0.5-2.4 kpc and photometric stellarmasses M-star = (1.2-4) x 10(11)M(circle dot). We find that these galaxies have velocity dispersions sigma = 156-236 km s(-1). The spectra are well fitted by single stellar population models with approximately 1 Gyr of age and solar metallicity. We find that (1) the dynamical masses of these galaxies are systematically smaller by a factor of similar to 6 than the published stellarmasses using BRIJK photometry, and (2) when estimating stellarmasses as 0.7xM(dyn), a combination of passive luminosity fading with mass/size growth due to minor mergers can plausibly evolve our objects to match the properties of the local population of ETGs.
dc.description.departmentDepto. de Física de la Tierra y Astrofísica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipSpanish MICINN
dc.description.sponsorshipUniversity of Florida
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/27876
dc.identifier.doi10.1088/2041-8205/738/2/L22
dc.identifier.issn2041-8205
dc.identifier.officialurlhttp://dx.doi.org/10.1088/2041-8205/738/2/L22
dc.identifier.relatedurlhttp://iopscience.iop.org/
dc.identifier.urihttps://hdl.handle.net/20.500.14352/44437
dc.issue.number2
dc.journal.titleAstrophysical journal letters
dc.language.isoeng
dc.publisherIOP Publishing
dc.relation.projectIDCSD2006-00070
dc.relation.projectIDAYA2009-11137
dc.relation.projectIDAYA2009-10368
dc.rights.accessRightsopen access
dc.subject.cdu52
dc.subject.keywordStar-formation rates
dc.subject.keywordTo-fir analysis
dc.subject.keywordSize evolution
dc.subject.keywordFundamental plane
dc.subject.keywordElliptic galaxies
dc.subject.keywordSpitzer/Irac sources
dc.subject.keywordLenticular galaxies
dc.subject.keywordKormendy relation
dc.subject.keywordSauron project
dc.subject.keywordField galaxies
dc.subject.ucmAstrofísica
dc.subject.ucmAstronomía (Física)
dc.subject.ucmFísica atmosférica
dc.subject.unesco2501 Ciencias de la Atmósfera
dc.titleVelocity Dispersions and Stellar Populations of the Most Compact and Msssive early-Type Galaxies at Redshift similar to 1
dc.typejournal article
dc.volume.number738
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