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With targeted imaging of groups in the local volume, the regions of collapse around bright galaxies can be clearly identified by the distribution of dwarfs and luminosity functions can be established to very faint levels. In the case of the…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 R. Brent Tully

We report the discovery of 271 previously undetected dwarf galaxies in the outer Fornax cluster regions at radii $r_{\rm vir}/4<\!r\!<r_{\rm vir}/2$ using data from the Next Generation Fornax Survey (NGFS) with deep coadded $u'$, $g'$ and…

The fine details of the large-scale structure in the local universe provide important empirical benchmarks for testing cosmological models of structure formation. Dwarf galaxies are key object for such studies. Enlarge the sample of known…

Astrophysics of Galaxies · Physics 2017-06-28 Oliver Müller , Roberto Scalera , Bruno Binggeli , Helmut Jerjen

We use Hyper Suprime-Cam on the Subaru Telescope to investigate the structural and photometric properties of early-type dwarf galaxies and young stellar systems at the center of the M81 Group. We have mapped resolved stars to $\sim2$…

Astrophysics of Galaxies · Physics 2019-11-06 Sakurako Okamoto , Nobuo Arimoto , Annette M. N. Ferguson , Mike J. Irwin , Edouard J. Bernard , Yousuke Utsumi

We present multicolour imaging for 33 dwarf and intermediate-luminosity galaxies in the field of the NGC 5044 Group, complemented with mid-resolution spectroscopy for a subsample of 13 objects. With these data, a revised membership and…

Astrophysics · Physics 2016-08-30 Sergio A. Cellone , Alberto Buzzoni

We investigate surface brightness profiles (SBPs) of dwarf galaxies in field, group, and cluster environments. With deep $BVI$ images from the Korea Microlensing Telescope Network Supernova Program, SBPs of 38 dwarfs in the NGC 2784 group…

Astrophysics of Galaxies · Physics 2018-05-23 Youngdae Lee , Hong Soo Park , Sang Chul Kim , Dae-Sik Moon , Jae-Joon Lee , Dong-Jin Kim , Sang-Mok Cha

We present the discovery of Bo\"otes V, a new ultra-faint dwarf galaxy candidate. This satellite is detected as a resolved overdensity of stars during an ongoing search for new Local Group dwarf galaxy candidates in the UNIONS photometric…

In this second paper of a series, we explore the B-V, U-B, and FUV-NUV radial color trends from a multi-wavelength sample of 141 dwarf disk galaxies. Like spirals, dwarf galaxies have three types of radial surface brightness profiles: (I)…

Astrophysics of Galaxies · Physics 2016-06-06 Kimberly A. Herrmann , Deidre A. Hunter , Bruce G. Elmegreen

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…

CCD - photometry is presented for 20 dIrr galaxies situated in the nearby complexes CenA/M83, and CVnI as well as in the general field of the Local Volume. We present integrated magnitudes of the galaxies in B,V,I - bands and also surface…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-13 L. Makarova , I. Karachentsev , L. Rizzi , R. B. Tully , G. Korotkova

We report the discovery of a new faint dwarf galaxy, which we dub Scl-MM-Dw1, at a projected distance of $\sim$65 kpc from the spiral galaxy NGC 253. The discovery results from the Panoramic Imaging Survey of Centaurus and Sculptor…

Astrophysics of Galaxies · Physics 2015-06-22 D. J. Sand , D. Crnojević , J. Strader , E. Toloba , J. D. Simon , N. Caldwell , P. Guhathakurta , B. McLeod , A. C. Seth

Galaxy evolution by interaction driven transformation is probably highly efficient in groups of galaxies. Dwarf galaxies with their shallow potential are expected to reflect the interaction most prominently in their observable structure.…

Astrophysics of Galaxies · Physics 2015-06-22 U. Hopp , J. Vennik

We present the discovery of d1005+68, a new faint dwarf galaxy in the M81 Group, using observations taken with the Subaru Hyper Suprime-Cam. d1005+68's color-magnitude diagram is consistent with a distance of $3.98_{-0.43}^{+0.39}$ Mpc,…

Astrophysics of Galaxies · Physics 2017-07-26 Adam Smercina , Eric F. Bell , Colin T. Slater , Paul A. Price , Jeremy Bailin , Antonela Monachesi

Observational bias against finding Milky Way (MW) dwarf galaxies at low Galactic latitudes (b < 20 deg) and at low surface brightnesses (fainter than 29 mag arcsec^-2, in the V-band) currently limits our understanding of the faintest limits…

Astrophysics of Galaxies · Physics 2015-11-11 Mariah Baker , Beth Willman

The Fornax Cluster Spectroscopic Survey (FCSS) project utilises the 2dF multi-object spectrograph on the AAT. Its aim is to obtain spectra for a complete sample of all 14000 objects with 16.5<bj<19.7 irrespective of their morphology in a 12…

AIMS: We analyse the photometric properties of the early-type Fornax cluster dwarf galaxy population, based on a wide field imaging study of the central cluster area in V and I. We used the instrument/telescope combination IMACS/Magellan at…

Astrophysics · Physics 2015-06-24 S. Mieske , M. Hilker , L. Infante , C. Mendes de Oliveira

We present trigonometric, photometric, and photographic distances to 1748 southern ($\delta \leq$0$^\circ$) M dwarf systems with $\mu \ge$ 0\farcs18 yr$^{-1}$, of which 1404 are believed to lie within 25 parsecs of the Sun. The stars have…

We present BVI photometry of 190 galaxies in the central region of the Fornax Cluster observed with the Michigan Curtis Schmidt Telescope. The cluster members exhibit a strong surface brightness-magnitude relation in our data: both giant…

Astrophysics · Physics 2009-11-07 A. M. Karick , M. J. Drinkwater , M. D. Gregg

The Giant GAlaxies, Dwarfs, and Debris Survey concentrates on the nearby universe to study how galaxies have interacted in groups of different morphology, density, and richness. In these groups we select the dominant spiral galaxy and…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 Johannes Ludwig , Anna Pasquali , Eva K. Grebel , John S. Gallagher