Results 81 to 90 of about 12,455 (258)

Pavo: Discovery of a Star-forming Dwarf Galaxy Just Outside the Local Group

The Astrophysical Journal Letters, 2023
We report the discovery of Pavo, a faint ( M _V = −10.0), star-forming, irregular, and extremely isolated dwarf galaxy at D ≈ 2 Mpc. Pavo was identified in Dark Energy Camera Legacy Survey imaging via a novel approach that combines low surface brightness
Michael G. Jones, Burçin Mutlu-Pakdil, David J. Sand, Richard Donnerstein, Denija Crnojević, Paul Bennet, Catherine E. Fielder, Ananthan Karunakaran, Kristine Spekkens, Jay Strader, Ryan Urquhart, Dennis Zaritsky   +11 more
doaj   +1 more source

What is the (Dark) Matter with Dwarf Galaxies?

, 2010
We present cosmological hydrodynamical simulations of the formation of dwarf galaxies in a representative sample of haloes extracted from the Millennium-II Simulation.
Aarseth, Adrian Jenkins, Baldry, Belokurov, Benson, Blanton, Bower, Boylan-Kolchin, Bruzual, Bush, Cantalupo, Carrasco, Cecilia Scannapieco, Chapman, Christlein, Cole, Cole, Cole, Conroy, Croton, de Blok, Dejonghe, Dekel, Dekel, Diemand, Dolphin, Efstathiou, Ferrara, Geha, Gnedin, Governato, Guo, Guo, Haardt, Hoeft, Hunter, Jenkins, Katz, Kauffmann, Kennicutt, Kennicutt, Khochfar, Klypin, Koch, Komatsu, Koposov, Koyama, Larson, Li, Mandelbaum, Martin, Mashchenko, McConnachie, McQuinn, Monelli, Moore, Moster, Navarro, Pelupessy, Power, Qi Guo, Quirk, Revaz, Ricotti, Salpeter, Sawala, Scannapieco, Scannapieco, Scannapieco, Scannapieco, Simon, Simon White, Skillman, Somerville, Springel, Springel, Springel, Springel, Staveley-Smith, Stinson, Stinson, Sutherland, Sánchez-Janssen, Thielemann, Till Sawala, Tollerud, Trentham, Valcke, Vale, Viel, Woosley, Yang, Zavala   +92 more
core   +1 more source

The Sagittarius dwarf irregular galaxy: Metallicity and stellar populations [PDF]

Astronomy & Astrophysics, 2002
10 pages, 7 figures, accepted A& ...
Momany, Y., Held, E. V., Saviane, I., Rizzi, L.   +3 more
openaire   +2 more sources

Metal-THINGS: a panchromatic analysis of the local scaling relationships of the dwarf irregular galaxy NGC 1569 [PDF]

, 2023
L. E. Garduño, Javier Zaragoza-Cardiel, M. A. Lara-López, I. A. Zinchenko, M. C. Zerbo, M. E. De Rossi, J. Fritz, Sami Dib, L. S. Pilyugin, M. Sánchez-Cruces, V. Heesen, S. P. O’Sullivan, Omar Lopez‐Cruz, Mabel Valerdi, M. Rosado   +14 more
openalex   +3 more sources

The Karl G. Jansky Very Large Array Local Group L-Band Survey (LGLBS)

The Astrophysical Journal Supplement Series
We present the Local Group L -Band Survey, a Karl G. Jansky Very Large Array (VLA) survey producing the highest-quality 21 cm and 1–2 GHz radio continuum images to date, for the six VLA-accessible, star-forming, Local Group galaxies. Leveraging the VLA’s
Eric W. Koch, Adam K. Leroy, Erik W. Rosolowsky, Laura Chomiuk, Julianne J. Dalcanton, Nickolas M. Pingel, Sumit K. Sarbadhicary, Snežana Stanimirović, Fabian Walter, Haylee N. Archer, Alberto D. Bolatto, Michael P. Busch, Hongxing Chen, Ryan Chown, Harrisen Corbould, Serena A. Cronin, Jeremy Darling, Thomas Do, Jennifer Donovan Meyer, Cosima Eibensteiner, Deidre Hunter, Rémy Indebetouw, Preshanth Jagannathan, Amanda A. Kepley, Chang-Goo Kim, Shin-Jeong Kim, Timea O. Kovacs, Joshua Marvil, Eric J. Murphy, Claire E. Murray, Jürgen Ott, D.J. Pisano, Mary Putman, Daniel R. Rybarczyk, Julia Roman-Duval, Karin Sandstrom, Eva Schinnerer, Evan D. Skillman, Adam Smercina, Ioana Stelea, Jay Strader, Jiayi Sun, Devisree Tallapaneni, Elizabeth Tarantino, Vicente Villanueva, Daniel R. Weisz, Thomas G. Williams, Tony Wong   +47 more
doaj   +1 more source

BVR photometry of the resolved dwarf galaxy Ho IX

, 2004
We present BVR CCD photometry down to limiting magnitude B=23.5 mag for 232 starlike objects and 11 diffuse objects in a 5.4' x 5.4' field of Ho IX. The galaxy is a gas-rich irregular dwarf galaxy possibly very close to M 81, which makes it especially ...
Aparicio, Bertelli, Bomans, Christian, D. J. Bomans, Davidge, Fernie, Fitzpatrick, Flower, Freedman, Georgiev, Georgiev, Georgiev, Georgiev, Georgiev, Georgiev, Georgiev, Georgiev, Georgiev, Heydari-Malayeri, Hill, Hopp, Hopp, Humphreys, Karachentsev, Karachentsev, Makarova, Makarova, Metcalfe, Miller, Notni, Perelmuter, Roberts, Sandage, Sandage, Stetson, Straizys, T. B. Georgiev, Treffers, Vallenari, Yun   +40 more
core   +1 more source

Star formation histories of dwarf galaxies from the Colour-Magnitude diagrams of their resolved stellar populations [PDF]

, 2009
In this tutorial paper we summarize how the star formation (SF) history of a galactic region can be derived from the colour-magnitude diagram (CMD) of its resolved stars.
Cignoni, Michele, Tosi, Monica
core   +4 more sources

Deep Hubble Space Telescope Imaging of IC 1613 II. The Star Formation History

, 2003
We present deep HST WFPC2 imaging of the Local Group dwarf irregular galaxy IC 1613. The photometry is the deepest to date for an isolated dwarf irregular galaxy.
Abhijit Saha, Andrew A. Cole, Andrew E. Dolphin, Antonello E., Babul A., Borissova J., Carraro G., Colless M., Duquennoy A., Efstathiou G., Eline Tolstoy, Evan D. Skillman, Fioc M., Gallagher J. S., Gardiner L. T., Glazebrook K., Hodge P., J. S. Gallagher, Kroupa P., Lake G., Maeder A., Mario Mateo, Matteucci F., Mighell K. J., Nath B. B., Peimbert M., Quinn T., R. C. Dohm‐Palmer, Rees M. J., Skillman E. D., Skillman E. D., White S. D. M.   +31 more
core   +4 more sources

Thick gas discs in faint dwarf galaxies

, 2010
We determine the intrinsic axial ratio distribution of the 'gas' disks of extremely faint M_B > -14.5 dwarf irregular galaxies. We start with the measured (beam corrected) distribution of apparent axial ratios in the HI 21cm images of dwarf irregular ...
Ayesha Begum, Begum, Begum, Begum, Begum, Begum, Begum, Begum, Begum, Binggeli, Binney, Binney, Dutta, Fall, Galametz, Haynes, Heidmann, Hubble, Igor D. Karachentsev, Jayaram N. Chengalur, Kaufmann, Lambas, Lucy, Noerdlinger, Roychowdhury, Ryden, Sambit Roychowdhury, Sandage, Shu, Staveley-Smith, Verheijen, Walter   +31 more
core   +1 more source

Oxygen abundances in nearby dwarf irregular galaxies

The Astrophysical Journal, 1989
Oxygen abundances are obtained by optical spectrophotometry of H II regions in seven nearby dwarf irregular galaxies. All of these yield oxygen abundances of less than 1/10 of the solar value, and most are in the range of 3-5 percent of the solar value. This suggests that observations of nearby dwarf galaxies may provide an effective means for studying
Evan D. Skillman, R. C. Kennicutt, P. W. Hodge   +2 more
openaire   +1 more source