Peculiar broad absorption line quasars found in the digitized palomar observatory sky survey

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dc.contributor.authorBrunner, RJ
dc.contributor.authorHall, PB
dc.contributor.authorDjorgovski, SG
dc.contributor.authorGal, RR
dc.contributor.authorMahabal, AA
dc.contributor.authorLopes, PAA
dc.contributor.authorde Carvalho, RR
dc.contributor.authorOdewahn, SC
dc.contributor.authorCastro, S
dc.contributor.authorThompson, D
dc.date.accessioned2025-01-21T01:09:16Z
dc.date.available2025-01-21T01:09:16Z
dc.date.issued2003
dc.description.abstractWith the recent release of large (i.e., greater than or similar to 100 million objects), well-calibrated photometric surveys, such as Digitized Palomar Observatory Sky Survey (DPOSS), Two Micron All Sky Survey, and Sloan Digital Sky Survey, spectroscopic identification of important targets is no longer a simple issue. In order to enhance the returns from a spectroscopic survey, candidate sources are often preferentially selected to be of interest, such as brown dwarfs or high-redshift quasars. This approach, while useful for targeted projects, risks missing new or unusual species. We have, as a result, taken the alternative path of spectroscopically identifying interesting sources with the sole criterion being that they are in low-density areas of the g-r and r-i color space defined by DPOSS. In this paper, we present three peculiar broad absorption line quasars that were discovered during this spectroscopic survey, demonstrating the efficacy of this approach. PSS J0052+2405 is an iron low-ionization broad absorption line (LoBAL) quasar at a redshift z = 2.4512-0.0001 with very broad absorption from many species. PSS J0141+3334 is a reddened LoBAL quasar at z = 3.005 +/- 0.005 with no obvious emission lines. PSS J1537+1227 is an iron LoBAL at a redshift of z = 1.212 +/- 0.007 with strong narrow Mg II and Fe II emission. Follow-up high-resolution spectroscopy of these three quasars promises to improve our understanding of BAL quasars. The sensitivity of particular parameter spaces, in this case a two-color space, to the redshift of these three sources is dramatic, raising questions about traditional techniques of de. ning quasar populations for statistical analysis.
dc.fuente.origenWOS
dc.identifier.issn0004-6256
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96563
dc.identifier.wosidWOS:000183905500007
dc.issue.numero1
dc.language.isoen
dc.pagina.final62
dc.pagina.inicio53
dc.revistaAstronomical journal
dc.rightsacceso restringido
dc.subjectquasars : absorption lines
dc.subjectquasars : emission lines
dc.subjectquasars : general
dc.subjectsurveys
dc.titlePeculiar broad absorption line quasars found in the digitized palomar observatory sky survey
dc.typeartículo
dc.volumen126
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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