SURFACE BRIGHTNESS FLUCTUATIONS IN THE <i>HUBBLE SPACE TELESCOPE</i> ACS/WFC F814W BANDPASS AND AN UPDATE ON GALAXY DISTANCES

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dc.contributor.authorBlakeslee, John P.
dc.contributor.authorCantiello, Michele
dc.contributor.authorMei, Simona
dc.contributor.authorCote, Patrick
dc.contributor.authorDeGraaff, Regina Barber
dc.contributor.authorFerrarese, Laura
dc.contributor.authorJordan, Andres
dc.contributor.authorPeng, Eric W.
dc.contributor.authorTonry, John L.
dc.contributor.authorWorthey, Guy
dc.date.accessioned2025-01-21T00:04:17Z
dc.date.available2025-01-21T00:04:17Z
dc.date.issued2010
dc.description.abstractWe measure surface brightness fluctuation (SBF) magnitudes in the F814W filter and (g(475)-I-814) colors for nine bright early-type Fornax cluster galaxies imaged with the Hubble Space Telescope Advanced Camera for Surveys (ACS). The goal is to achieve the first systematic SBF calibration for the ACS/F814W bandpass. Because of its much higher throughput, F814W is more efficient for SBF studies of distant galaxies than the ACS/F850LP bandpass that has been used to study nearby systems. Over the color range spanned by the sample galaxies, 1.06 < (g(475)-I-814) < 1.32 (AB mag), the dependence of SBF magnitude (m) over bar (814) on (g(475)-I-814) is linear to a good approximation, with slope similar to 2. When the F850LP SBF distance measurements from the ACS Fornax Cluster Survey are used to derive absolute (M) over bar (814) magnitudes, the dependence on (g(475)-I-814) becomes extremely tight, with a slope of 1.8 +/- 0.2 and a scatter of 0.03 mag. The small observed scatter indicates both that the estimated random errors are correct and that the intrinsic deviations from the SBF-color relation are strongly correlated between the F814W and F850LP bandpasses, as expected. The agreement with predictions from stellar population models is good, both in slope and zero point, indicating that our mean Fornax distance of 20 Mpc is accurate. The models predict curvature in the relation beyond the color limits of our sample; thus, the linear calibration should not be extrapolated naively. In the appendices, we reconsider the Tonry ground-based and Jensen NICMOS SBF distance catalogs; we provide a correction formula to ameliorate the small apparent bias in the former and the offset needed to make the latter consistent with other SBF studies. We also tabulate two new SBF distances to galaxies observed in the ACS Virgo Cluster Survey.
dc.description.funderNASA
dc.fuente.origenWOS
dc.identifier.doi10.1088/0004-637X/724/1/657
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://doi.org/10.1088/0004-637X/724/1/657
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95500
dc.identifier.wosidWOS:000284096900056
dc.issue.numero1
dc.language.isoen
dc.pagina.final668
dc.pagina.inicio657
dc.revistaAstrophysical journal
dc.rightsacceso restringido
dc.subjectgalaxies: clusters: individual (Fornax)
dc.subjectgalaxies: distances and redshifts
dc.subjectgalaxies: elliptical and lenticular, cD
dc.titleSURFACE BRIGHTNESS FLUCTUATIONS IN THE <i>HUBBLE SPACE TELESCOPE</i> ACS/WFC F814W BANDPASS AND AN UPDATE ON GALAXY DISTANCES
dc.typeartículo
dc.volumen724
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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