Results 1 to 10 of about 11,803 (197)

Giant Halos in Dwarf Irregular Galaxies vs. Dwarf Elliptical Galaxies [PDF]

Proceedings of the International Astronomical Union, 2005
We present a discovery of a giant stellar halo in NGC 6822, a dwarf irregular galaxy in the Local Group. This halo is mostly made of old red giants, showing striking features: 1) it is several times larger than the main body of the galaxy seen in the ...
Hwang, Narae, Lee, Myung Gyoon
core   +2 more sources

Lopsidedness in dwarf irregular galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2000
We quantify the amplitude of the lopsidedness, the azimuthal angular asymmetry index, and the concentration of star forming regions, as represented by the distribution of the H$\alpha$ emission, in a sample of 78 late-type irregular galaxies.
Abraham, Alexander, Almoznino, Ana B. Heller, Brosch, Carignan, Conselice, Dohm-Palmer, Dohm-Palmer, Dohm-Palmer, Draper, Edelson, Elchanan Almoznino, Elmegreen, Gerola, Heller, Heller, Hunter, Jog, John J. Salzer, Kaspi, Kornreich, Larson, Leitherer, Levine, Liese van Zee, Mihos, Moffat, Netzer, Noah Brosch, Rudnick, Salzer, Schechter, Skillman, van Zee, van Zee, van Zee, van Zee, van Zee, Walker, Young, Zaritsky   +41 more
core   +5 more sources

Dwarfs from the Dark (Energy Survey): a machine learning approach to classify dwarf galaxies from multi-band images

The Open Journal of Astrophysics, 2021
Countless low-surface brightness objects - including spiral galaxies, dwarf galaxies, and noise patterns - have been detected in recent large surveys.
Oliver Müller, Eva Schnider
doaj   +1 more source

A Comparison between the Morphologies and Structures of Dwarf Galaxies with and without Active Massive Black Holes

The Astrophysical Journal, 2023
We study the morphologies and structures of 57 dwarf galaxies that are representative of the general population of dwarf galaxies and compare their demographics to a sample of dwarf galaxies hosting optically selected active galactic nuclei (AGNs).
Seth J. Kimbrell, Amy E. Reines, Jenny E. Greene, Marla Geha   +3 more
doaj   +1 more source

Searching for TeV Dark Matter in Irregular Dwarf Galaxies with HAWC Observatory

The Astrophysical Journal, 2023
We present the results of dark matter (DM) searches in a sample of 31 dwarf irregular (dIrr) galaxies within the field of view of the HAWC Observatory.
R. Alfaro, C. Alvarez, J. C. Arteaga-Velázquez, D. Avila Rojas, H. A. Ayala Solares, R. Babu, E. Belmont-Moreno, K. S. Caballero-Mora, T. Capistrán, A. Carramiñana, S. Casanova, O. Chaparro-Amaro, U. Cotti, J. Cotzomi, E. De la Fuente, R. Diaz Hernandez, B. L. Dingus, M. A. DuVernois, M. Durocher, J. C. Díaz-Vélez, C. Espinoza, K. L. Fan, N. Fraija, J. A. García-González, F. Garfias, M. M. González, J. P. Harding, S. Hernández-Cadena, D. Huang, F. Hueyotl-Zahuantitla, A. Iriarte, V. Joshi, S. Kaufmann, D. Kieda, J. Lee, H. León Vargas, J. T. Linnemann, A. L. Longinotti, G. Luis-Raya, K. Malone, O. Martinez, J. Martínez-Castro, J. A. Matthews, E. Moreno, M. Mostafá, A. Nayerhoda, L. Nellen, N. Omodei, Y. Pérez Araujo, E. G. Pérez-Pérez, C. D. Rho, D. Rosa-González, H. Salazar, D. Salazar-Gallegos, A. Sandoval, J. Serna-Franco, Y. Son, R. W. Springer, O. Tibolla, K. Tollefson, I. Torres, R. Torres-Escobedo, R. Turner, F. Ureña-Mena, L. Villaseñor, X. Wang, E. Willox, H. Zhou, C. de León, The HAWC Collaboration, V. Gammaldi, E. Karukes, P. Salucci   +72 more
doaj   +1 more source

THE OUTER DISKS OF DWARF IRREGULAR GALAXIES [PDF]

The Astronomical Journal, 2011
AJ, in ...
Hunter, Deidre A., Elmegreen, Bruce G., Oh, Se-Heon, Anderson, Ed, Nordgren, Tyler E., Massey, Philip, Wilsey, Nick, Riabokin, Malanka   +7 more
openaire   +2 more sources

The Full-fledged Dwarf Irregular Galaxy Leo A [PDF]

The Astrophysical Journal, 2004
9 pages, 3 figures, submitted to ...
Vansevicius, Vladas, Arimoto, Nobuo, Hasegawa, Takashi, Ikuta, Chisato, Jablonka, Pascale, Narbutis, Donatas, Ohta, Kouji, Stonkute, Rima, Tamura, Naoyuki, Vansevicius, Valdas, Yamada, Yoshihiko   +10 more
openaire   +3 more sources

DDO68 C: The Actual Appearance of a Ghost Satellite Dwarf through Adaptive Optics at the Large Binocular Telescope

The Astrophysical Journal Letters, 2023
Through adaptive optics (AO) imaging with the SOUL+LUCI instrument at the Large Binocular Telescope we were able to resolve, for the first time, individual stars in the gas-rich galaxy DDO68 C. This system was already suggested to be interacting with the
Francesca Annibali, Enrico Pinna, Leslie K. Hunt, Diego Paris, Felice Cusano, Michele Bellazzini, John M. Cannon, Raffaele Pascale, Monica Tosi, Fabio Rossi   +9 more
doaj   +1 more source

The Evolutionary Status of Isolated Dwarf Irregular Galaxies II. Star Formation Histories and Gas Depletion [PDF]

, 2001
The results of UBV and H alpha imaging of a large sample of isolated dwarf irregular galaxies are interpreted in the context of composite stellar population models.
Arimoto N., Babul A., Gallagher J. S., III, Girardi L., Kruger H., Liese van Zee, Madau P., Makarova L., Scalo J. M., Skillman E. D., Skillman E. D., Tinsley B. M., van den Hoek L. B.   +12 more
core   +2 more sources

Stellar Populations of Dwarf Irregular Galaxies [PDF]

Symposium - International Astronomical Union, 1996
We recently completed two-color CCD photometry of resolved stars in 11 dwarf irregular galaxies (Hopp & Schulte-Ladbeck, 1995, A&AS 111, 527), selected because of their relative isolation from massive galaxies in the Kran-Korteweg – Tammann sample (1979, AN 300, 181).
R.E. Schulte-Ladbeck, Ulrich Hopp
openaire   +1 more source