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相关论文: SBF Distances to Dwarf Elliptical Galaxies in the …

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We report the discovery from Hubble Space Telescope ACS images of an extended globular cluster, denoted by Scl-dE1 GC1, in the Sculptor Group dwarf Elliptical galaxy Scl-dE1 (Sc22). The distance of the dE is determined as 4.3 +/- 0.25 Mpc…

星系天体物理 · 物理学 2009-11-13 G. S. Da Costa , E. K. Grebel , H. Jerjen , M. Rejkuba , M. E. Sharina

We obtained B and R-band CCD images for the dwarf elliptical (dE) galaxies DDO44, UGC4998, KK98_77, DDO71, DDO113, and UGC7356 at the NOT. Using Fourier analysis technique we measure stellar R-band surface brightness fluctuations (SBFs) and…

天体物理学 · 物理学 2009-11-07 Helmut Jerjen , Rami Rekola , Leo Takalo , Matthew Coleman , Mauri Valtonen

We have obtained deep B and R-band CCD photometry for 5 dE galaxies that were previously identified on Schmidt films covering the Cen A group region. From a Fourier analysis of the R-band CCD images we determined the surface brightness…

天体物理学 · 物理学 2009-10-31 Helmut Jerjen , Ken C. Freeman , Bruno Binggeli

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…

天体物理学 · 物理学 2009-11-07 S. Mieske , M. Hilker , L. Infante

We have employed FORS1/2+VLT to acquire deep B and R CCD images of 16 dwarf elliptical galaxies in the direction of the Virgo cluster. For each dwarf we measure the R-band surface brightness fluctuation (SBF) magnitude \bar{m}_R and the…

天体物理学 · 物理学 2009-11-10 H. Jerjen , Bruno Binggeli , Fabio D. Barazza

We present Surface Brightness Fluctuation distances of nine early-type dwarf galaxies and the S0 galaxy NGC 4150 in the Local Volume based on deep B- and R-band CCD images obtained with the 2.56 metre Nordic Optical Telescope. Typically,…

天体物理学 · 物理学 2009-11-11 Rami Rekola , Helmut Jerjen , Chris Flynn

We present an analysis of Hubble Space Telescope/WFPC2 images of nine nearby galaxies in Sculptor. We derive their distances from the luminosity of the tip of the red giant branch stars with a typical accuracy of ~ 12%. Their distances are…

We report data for $I$ band Surface Brightness Fluctuation (SBF) magnitudes, V-I colors, and distance moduli for 300 galaxies. The Survey contains E, S0 and early-type spiral galaxies in the proportions of 49:42:9, and is essentially…

The morphological types of 5840 galaxies were classified by a visual inspection of color images using the Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7) to produce a morphology catalog of a representative sample of local galaxies with…

星系天体物理 · 物理学 2015-06-23 H. B. Ann , Mira Seo , D. K. Ha

We present analysis of local large scale flows using the Surface Brightness Fluctuation (SBF) Survey for the distances to 300 early-type galaxies. Our models of the distribution function of mean velocity and velocity dispersion at each…

天体物理学 · 物理学 2010-11-04 John L. Tonry , John P. Blakeslee , Edward A. Ajhar , Alan Dressler

The Surface Brightness Fluctuation method has been shown to be a powerful distance indicator for dwarf elliptical galaxies to very low surface brightness levels. It is applicable to stellar systems that are out of reach for classical…

天体物理学 · 物理学 2009-11-11 Helmut Jerjen

We present our results of deep 21 cm line (HI) observations of five early and mixed-type dwarf galaxies in the nearby Sculptor group using the ATNF 64m Parkes Radio Telescope. Four of these objects, ESO294-G010, ESO410-G005, ESO540-G030,…

天体物理学 · 物理学 2008-11-26 Antoine Bouchard , Helmut Jerjen , Gary S. Da Costa , Juergen Ott

The specific globular cluster frequencies (S_N) for 24 dwarf elliptical (dE) galaxies in the Virgo and Fornax Clusters and the Leo Group imaged with the Hubble Space Telescope are presented. Combining all available data, we find that for…

天体物理学 · 物理学 2009-10-31 B. W. Miller , J. M. Lotz , H. C. Ferguson , M. Stiavelli , B. C. Whitmore

Surface brightness fluctuations (SBF) have been detected for three elliptical galaxies-NGC 3379 in the Leo group, NGC 4406 in the Virgo cluster, and NGC 4373 in the Hydra-Centaurus supercluster-using marginally-sampled, deep images taken…

天体物理学 · 物理学 2009-10-30 M. A. Pahre , J. R. Mould , A. Dressler , the WFPC-2 Investigation Definition Team

(Abridged) We explore the spatial distribution of stars in the Sculptor dwarf spheroidal (dSph) galaxy over an area of 7.82 deg^2. We identify red giant branch (RGB) starts via Washington M, T_2+DDO51 photometry and a blue horizontal branch…

We present kinematic and metallicity profiles for the M31 dwarf elliptical (dE) satellite galaxies NGC 147 and NGC 185. The profiles represent the most extensive spectroscopic radial coverage for any dE galaxy, extending to a projected…

宇宙学与河外天体物理 · 物理学 2014-11-20 M. Geha , R. P. van der Marel , P. Guhathakurta , K. M. Gilbert , J. Kalirai , E. N. Kirby

We present Hubble Space Telescope/WFPC2 images of sixteen dwarf galaxies as part of our snapshot survey of nearby galaxy candidates. We derive their distances from the luminosity of the tip of the red giant branch stars with a typical…

The surface brightness fluctuation (SBF) method is a robust and efficient way of measuring distances to galaxies containing evolved stellar populations. Although many recent applications of the method have used space-based imaging, SBF…

We present VLT/FLAMES spectroscopic observations (R~6500) in the CaII triplet region for 470 probable kinematic members of the Sculptor (Scl) dwarf spheroidal galaxy. The accurate velocities (+- 2 km/s) and large area coverage of Scl allow…

天体物理学 · 物理学 2009-11-13 G. Battaglia , A. Helmi , E. Tolstoy , M. Irwin , V. Hill , P. Jablonka

An all-sky list of 88 nearby dwarf spheroidal (dSph) galaxies with distances D < 10 Mpc is considered. Most of the objects have recently been found by Karachentseva & Karachentsev based on POSSII/ESO-SERC survey. A hundred more dSph…

天体物理学 · 物理学 2009-11-11 I. D. Karachentsev , V. E. Karachentseva , M. E. Sharina
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