Potential of the Surface Brightness Fluctuations method to measure distances to dwarf elliptical galaxies in nearby clusters

Abstract

The potential of the Surface Brightness Fluctuations (SBF) method to determine the membership of dwarf elliptical galaxies (dEs) in nearby galaxy clusters is investigated. Extensive simulations for SBF measurements on dEs in the I-band for various combinations of distance modulus, seeing and integration time are presented, based on average VLT FORS1 and FORS2 zero points. These show that for distances up to 20 Mpc (Fornax or Virgo cluster distance), reliable membership determination of dEs can be obtained down to very faint magnitudes -10<M_V<-12 mag (25 mag / arcsec^2) within integration times of the order of 1 hour and with good seeing. Comparing the limiting magnitudes of the method for the different simulated observing conditions we derive some simple rules to calculate integration time and seeing needed to reach a determined limiting magnitude at a given distance modulus for observing conditions different to the ones adopted in the simulations. Our simulations show a small offset of the order of 0.15 mag towards measuring too faint SBF. It is shown that this is due to loss of fluctuation signal when recovering pixel-to-pixel fluctuations from a seeing convolved image. To check whether our simulations represent well the behaviour of real data, SBF measurements for a real and simulated sample of bright Centaurus Cluster dEs are presented. They show that our simulations are in good agreement with the achievable S/N of SBF measurements on real galaxies.

arXiv comment12 pages, 8 figures, accepted by A&A, replaced by version with non-abridged bottom page limit

References in corpus (23)

• Dwarf Galaxies of the Local Group
• The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances
• A Unified Model for the Evolution of Galaxies and Quasars
• New Insights from HST Studies of Globular Cluster Systems I: Colors, Distances and Specific Frequencies of 28 Elliptical Galaxies
• The SBF Survey of Galaxy Distances. II. Local and Large-Scale Flows
• The central region of the Fornax cluster -- II. Spectroscopy and radial velocities of member and background galaxies
• The SBF Survey of Galaxy Distances. I. Sample Selection, Photometric Calibration, and the Hubble Constant
• A step toward the calibration of the RGB Tip as a Standard Candle
• The faint end of the galaxy luminosity function
• A Database of Cepheid Distance Moduli and TRGB, GCLF, PNLF and SBF Data Useful for Distance Determinations
• SBF Distances to Dwarf Elliptical Galaxies in the Sculptor Group
• The Specific Globular Cluster Frequencies of Dwarf Elliptical Galaxies from the Hubble Space Telescope
• The luminosity function of the Virgo Cluster from M_B=-22 to M_B=-11
• Updated Information on the Local Group
• Measuring Distances Using Infrared Surface Brightness Fluctuations
• Testing the Surface Brightness Fluctuations Method for Dwarf Elliptical Galaxies in the Centaurus A Group
• Dwarf Spheroidal Galaxies in the Virgo Cluster
• Faint dwarf spheroidals in the Fornax Cluster: A flat luminosity function
• A Survey for Low Surface Brightness Galaxies Around M31. II. The Newly Discovered Dwarf Andromeda VI
• The Luminosity Distribution of Local Group Galaxies
• The Ursa Major Cluster of Galaxies. III. Optical observations of dwarf galaxies and the luminosity function down to M_R=-11
• The Low Surface Brightness Extent of the Fornax Cluster
• Surface brightness fluctuation distances for nearby dwarf elliptical galaxies

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• The ACS Virgo Cluster Survey. XIII. SBF Distance Catalog and the Three-Dimensional Structure of the Virgo Cluster
• The ACS Fornax Cluster Survey. V. Measurement and Recalibration of Surface Brightness Fluctuations and a Precise Value of the Fornax--Virgo Relative Distance
• Surface Brightness Fluctuations in the Hubble Space Telescope ACS/WFC F814W Bandpass and an Update on Galaxy Distances
• Distances, Metallicities, and Ages of Dwarf Elliptical Galaxies in the Virgo Cluster from Surface Brightness Fluctuations
• The ACS Virgo Cluster Survey IV: Data Reduction Procedures for Surface Brightness Fluctuation Measurements with the Advanced Camera for Surveys
• The Distance of the Dark Matter Deficient Galaxy NGC1052-DF2
• The early-type dwarf galaxy population of the Fornax cluster
• Using Surface Brightness Fluctuations to Study Nearby Satellite Galaxy Systems: Calibration and Methodology
• Measuring distances to low-luminosity galaxies using surface brightness fluctuations
• The distance to Hydra and Centaurus from surface brightness fluctuations: Consequences for the Great Attractor model
• Measuring Infrared Surface Brightness Fluctuation Distances with HST WFC3: Calibration and Advice
• Galaxy populations in the Hydra I cluster from the VEGAS survey I. Optical properties of a large sample of dwarf galaxies
• Distance to the Centaurus cluster and its subcomponents from surface brightness fluctuations
• Dwarf Galaxy Discoveries from the KMTNet Supernova Program II. The NGC 3585 Group and Its Dynamical State