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dc.contributor.authorNilo Castellón, José Luis
dc.contributor.authorAlonso, M. Victoria
dc.contributor.authorGarcía Lambas, Diego
dc.contributor.authorValotto, Carlos
dc.contributor.authorO' Mill, Ana Laura
dc.contributor.authorCuevas, Héctor
dc.contributor.authorCarrasco, Eleazar R.
dc.contributor.authorRamírez, Amelia
dc.contributor.authorAstudillo, José M.
dc.contributor.authorRamos, Felipe
dc.contributor.authorJaque Arancibia, Marcelo
dc.contributor.authorUlloa, Natalie
dc.contributor.authorÓrdenes, Yasna
dc.date.accessioned2016-07-22T16:30:21Z
dc.date.available2016-07-22T16:30:21Z
dc.date.issued2016-06
dc.identifier.citationThe Astronomical Journal, Volume 151, Number 6es
dc.identifier.issn0004-6256
dc.identifier.other10.3847/0004-6256/151/6/151
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/1141
dc.descriptionIndexación: Web of Sciencees
dc.description.abstractWe present our study of 19 low X-ray luminosity galaxy clusters (L-X similar to 0.5-45. x. 10(43) erg s(-1)), selected from the ROSAT Position Sensitive Proportional Counters Pointed Observations and the revised version of Mullis et al. in the redshift range of 0.16-0.7. This is the introductory paper of a series presenting the sample selection, photometric and spectroscopic observations, and data reduction. Photometric data in different passbands were taken for eight galaxy clusters at Las Campanas Observatory; three clusters at Cerro Tololo Interamerican Observatory; and eight clusters at the Gemini Observatory. Spectroscopic data were collected for only four galaxy clusters using Gemini telescopes. Using the photometry, the galaxies were defined based on the star-galaxy separation taking into account photometric parameters. For each galaxy cluster, the catalogs contain the point-spread function and aperture magnitudes of galaxies within the 90% completeness limit. They are used together with structural parameters to study the galaxy morphology and to estimate photometric redshifts. With the spectroscopy, the derived galaxy velocity dispersion of our clusters ranged from 507 km s(-1) for [VMF98]022 to 775 km s-1 for [VMF98] 097 with signs of substructure. Cluster membership has been extensively discussed taking into account spectroscopic and photometric redshift estimates. In this sense, members are the galaxies within a projected radius of 0.75 Mpc from the X-ray emission peak and with clustercentric velocities smaller than the cluster velocity dispersion or 6000 km s(-1), respectively. These results will be used in forthcoming papers to study, among the main topics, the red cluster sequence, blue cloud and green populations, the galaxy luminosity function, and cluster dynamics.es
dc.description.urihttp://iopscience.iop.org/article/10.3847/0004-6256/151/6/151/meta
dc.language.isoenes
dc.publisherIOP PUBLISHINGes
dc.subjectGalaxies: clusters: generales
dc.subjectGalaxies: fundamental parameterses
dc.subjectGalaxies: photometryes
dc.subjectCOLOR-MAGNITUDE RELATIONes
dc.subjectINTERMEDIATE-REDSHIFT GROUPSes
dc.subjectDATA REDUCTION TECHNIQUESes
dc.subjectBROAD-BAND PHOTOMETRYes
dc.subjectHUBBLE DEEP FIELDes
dc.subjectLESS-THAN 0.70es
dc.subjectRED-SEQUENCEes
dc.subjectELLIPTIC GALAXIES; DISTANT CLUSTERSes
dc.subjectSTAR-FORMATIONes
dc.titleLOW X-RAY LUMINOSITY GALAXY CLUSTERS: MAIN GOALS, SAMPLE SELECTION, PHOTOMETRIC AND SPECTROSCOPIC OBSERVATIONSes
dc.typeArticlees


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