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We present deep Hubble Space Telescope imaging of five faint dwarf galaxies associated with the nearby spiral NGC 253 (D$\approx$3.5 Mpc). Three of these are newly discovered ultra-faint dwarf galaxies, while all five were found in the…

A faint dwarf irregular galaxy has been discovered in the HST/ACS field of LV J1157+5638. The galaxy is resolved into individual stars, including the brightest magnitude of the red giant branch. The dwarf is very likely a physical satellite…

星系天体物理 · 物理学 2017-12-27 L. N. Makarova , D. I. Makarov , A. V. Antipova , I. D. Karachentsev , R. B. Tully

We present the results of the Large Binocular Telescope Satellites Of Nearby Galaxies Survey (LBT-SONG) ``Far Sample,'' including survey completeness estimates. We find 10 satellite candidates in the inner virial regions of 13 star-forming…

We determined HI parameters for eleven nearby late-type dwarf galaxies using FASHI data cubes, despite the fact that the first version of the FASHI catalog does not list any radio sources that could correspond to these galaxies. Four of…

星系天体物理 · 物理学 2025-09-17 Aleksandra Nazarova , Dmitry Makarov , Igor Karachentsev , Chuan-Peng Zhang , Ming Zhu

I present a dynamical analysis of the measured redshifts and distances of 64 dwarf galaxies at distances between 50 kpc and 2.6 Mpc. These dwarfs are assumed to move as test particles in the gravitational field of 12 massive…

星系天体物理 · 物理学 2017-05-31 P. J. E. Peebles

We have obtained accurate near-infrared photometry of the Tip of the Red Giant Branches in the Local Group galaxies Sculptor, NGC 6822, NGC 3109, IC 1613 and WLM. We have used the derived TRGB magnitudes together with the absolute magnitude…

宇宙学与河外天体物理 · 物理学 2015-05-28 Marek Gorski , Grzegorz Pietrzynski , Wolfgang Gieren

The dwarf galaxies of the Local Group are believed to be similar to the most abundant galaxies during the epoch of reionization (z>6). As a result of their proximity, there is a wealth of information that can be obtained about these…

星系天体物理 · 物理学 2015-12-23 Anna Patej , Abraham Loeb

We have searched for nearby dwarf galaxies in 27 northern groups with characteristic distances 8-15 Mpc based on the Second Palomar Sky Survey prints. In a total area of about 2000 square degrees, we have found 90 low-surface-brightness…

天体物理学 · 物理学 2009-06-23 I. D. Karachentsev , V. E. Karachentseva , W. K. Huchtmeier

The main goal of this work is to form a large, deep and representative sample of dwarf galaxies residing in voids of the nearby Universe. The formed sample is the basement for the comprehensive mass study of the galaxy content, their…

星系天体物理 · 物理学 2018-12-17 S. A. Pustilnik , A. L. Tepliakova , D. I. Makarov

We report the discovery of three new star clusters in the halo of the Local Group dwarf irregular galaxy NGC 6822. These clusters were found in the deep images taken with the MegaPrime at the CFHT, covering a total field of 2 deg x 2 deg.…

We present Hubble Space Telescope/WFPC2 images of eighteen galaxies situated in the vicinity of the Local Group (LG) as part of an ongoing snapshot survey of nearby galaxies. Their distances derived from the magnitude of the tip of the red…

We present the results of an all-sky, deep optical survey for faint Local Group dwarf galaxies. Candidate objects were selected from the second Palomar survey (POSS-II) and ESO/SRC survey plates and follow-up observations performed to…

天体物理学 · 物理学 2008-11-26 Alan B. Whiting , George K. T. Hau , Mike Irwin , Miguel Verdugo

This review aims to give an overview of the contribution of the Hubble Space Telescope to our understanding of the detailed properties of Local Group dwarf galaxies and their older stellar populations. The exquisite stable high spatial…

天体物理学 · 物理学 2007-05-23 Eline Tolstoy

Accurate distances are fundamental to interpreting many measured properties of galaxies. Surprisingly, many of the best-studied spiral galaxies in the Local Volume have distance uncertainties that are much larger than can be achieved with…

星系天体物理 · 物理学 2017-07-27 Kristen B. W. McQuinn , Evan D. Skillman , Andrew E. Dolphin , Danielle Berg , Robert Kennicutt

An optical monitoring survey in the nearby dwarf galaxies was carried out with the 2.5-m Isaac Newton Telescope (INT). 55 dwarf galaxies and four isolated globular clusters in the Local Group (LG) were observed with the Wide Field Camera…

As part of the Panoramic Imaging Survey of Centaurus and Sculptor (PISCeS) we report the discovery of a pair of faint dwarf galaxies (CenA-MM-Dw1 and CenA-MM-Dw2) at a projected distance of $\sim$90 kpc from the nearby elliptical galaxy…

星系天体物理 · 物理学 2015-06-22 D. Crnojević , D. J. Sand , N. Caldwell , P. Guhathakurta , B. McLeod , A. Seth , J. Simon , J. Strader , E. Toloba

A distance-limited sample of 869 objects from the Updated Nearby Galaxy Catalog is used to characterize the star formation status of the Local Volume population. We present a compiled list of 1217 star formation rate (SFR) estimates for 802…

宇宙学与河外天体物理 · 物理学 2015-06-16 Igor D. Karachentsev , Elena I. Kaisina

We have obtained deep near-infrared $J$- (1.25 $\mu$m), $H$- (1.65$ \mu$m) and $K_s$-band (2.15 $\mu$m) imaging for a sample of six dwarf galaxies ($M_B\ga-17$ mag) in the Local Volume (LV, $D\la10$ Mpc). The sample consists mainly of…

宇宙学与河外天体物理 · 物理学 2015-05-18 B. de Swardt , R. C. Kraan-Korteweg , H. Jerjen

Dwarf galaxies in the local group provide a unique astrophysical laboratory. Despite their proximity some of these systems still lack a reliable distance determination as well as studies of their stellar content and star formation history.…

天体物理学 · 物理学 2007-05-23 Jan Snigula , Claus Goessl , Ulrich Hopp , Heinz Barwig

We predict the dwarf galaxy detection limits for the upcoming Chinese Space Station Telescope (CSST) survey that will cover 17,500 deg$^{2}$ of the sky with a wide field of view of 1.1 deg$^2$. The point-source depth reaches 26.3 mag in the…