THE ACS FORNAX CLUSTER SURVEY. IV. DEPROJECTION OF THE SURFACE BRIGHTNESS PROFILES OF EARLY-TYPE GALAXIES IN THE VIRGO AND FORNAX CLUSTERS: INVESTIGATING THE "CORE/POWER-LAW DICHOTOMY"

Simple item page
dc.contributor.authorGlass, Lisa
dc.contributor.authorFerrarese, Laura
dc.contributor.authorCote, Patrick
dc.contributor.authorJordan, Andres
dc.contributor.authorPeng, Eric
dc.contributor.authorBlakeslee, John P.
dc.contributor.authorChen, Chin-Wei
dc.contributor.authorInfante, Leopoldo
dc.contributor.authorMei, Simona
dc.contributor.authorTonry, John L.
dc.contributor.authorWest, Michael J.
dc.date.accessioned2025-01-21T00:03:56Z
dc.date.available2025-01-21T00:03:56Z
dc.date.issued2011
dc.description.abstractAlthough early observations with the Hubble Space Telescope (HST) pointed to a sharp dichotomy among early-type galaxies in terms of the logarithmic slope gamma' of their central surface brightness profiles, several studies in the past few years have called this finding into question. In particular, recent imaging surveys of 143 early-type galaxies belonging to the Virgo and Fornax Clusters using the Advanced Camera for Surveys (ACS) on board HST have not found a dichotomy in gamma', but instead a systematic progression from central luminosity deficit to excess relative to the inward extrapolation of the best-fitting global Sersic model. Given that earlier studies also found that the dichotomy persisted when analyzing the deprojected density profile slopes, we investigate the distribution of the three-dimensional luminosity density profiles of the ACS Virgo and Fornax Cluster Survey galaxies. Having fitted the surface brightness profiles with modified Sersic models, we then deproject the galaxies using an Abel integral and measure the inner slopes gamma(3D) of the resulting luminosity density profiles at various fractions of the effective radius R-e. We find no evidence of a dichotomy, but rather, a continuous variation in the central luminosity profiles as a function of galaxy magnitude. We introduce a parameter, Delta(3D), that measures the central deviation of the deprojected luminosity profiles from the global Sersic fit, showing that this parameter varies smoothly and systematically along the luminosity function.
dc.fechaingreso.objetodigital2025-03-04
dc.fuente.origenWOS
dc.identifier.doi10.1088/0004-637X/726/1/31
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://doi.org/10.1088/0004-637X/726/1/31
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95485
dc.identifier.wosidWOS:000285411300031
dc.issue.numero1
dc.language.isoen
dc.nota.accesocontenido completo
dc.revistaAstrophysical journal
dc.rightsacceso abierto
dc.subjectgalaxies: clusters: individual (Virgo, Fornax)
dc.subjectgalaxies: elliptical and lenticular, cD
dc.subjectgalaxies: formation
dc.subjectgalaxies: nuclei
dc.subjectgalaxies: structure
dc.titleTHE ACS FORNAX CLUSTER SURVEY. IV. DEPROJECTION OF THE SURFACE BRIGHTNESS PROFILES OF EARLY-TYPE GALAXIES IN THE VIRGO AND FORNAX CLUSTERS: INVESTIGATING THE "CORE/POWER-LAW DICHOTOMY"
dc.typeartículo
dc.volumen726
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
THE ACS FORNAX CLUSTER SURVEY. IV. DEPROJECTION OF THE SURFACE BRIGHTNESS PROFILES OF EARLY-TYPE GALAXIES IN THE VIRGO AND FORNAX CLUSTERS.pdf
Size:
2.29 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Artículos de revistas