Results 31 to 40 of about 11,803 (197)

Molecular Clouds in Dwarf Irregular Galaxies [PDF]

Highlights of Astronomy, 1989
The study of molecular clouds in dwarf galaxies was, until recently, an arduous task and provided detections in only a handful of sources (see Thronson and Bally 1986; Wiklind et al. 1986; Tacconi and Young 1987; Arnoult et al. 1988). Line strengths observed in CO were small (<100mK) and measurements were confined to one position per source, thus ...
openaire   +1 more source

Tidal dwarfs in the M81 group: the second generation? [PDF]

, 2002
We derive quantitative star formation histories of the four suspected tidal dwarf galaxies in the M81 group, HolmbergIX, BK3N, Arp-loop (A0952+69), and Garland, using Hubble Space Telescope/Wide Field Planetary Camera2 images in F606W and F814W obtained ...
Dolphin, A. E., Geisler, D., Grebel, E. K., Guhathakurta, P., Hodge, P. W., Karachentsev, I. D., Karachentseva, V. E., Makarova, L. N., Sarajedini, A., Seitzer, P., Sharina, M. E.   +10 more
core   +1 more source

The rotation curves shapes of late-type dwarf galaxies [PDF]

, 2008
We present rotation curves derived for a sample of 62 late-type dwarf galaxies that have been observed as part of the Westerbork HI Survey of Spiral and Irregular Galaxies (WHISP) project.
Begeman, Begum, Blais-Ouellette, Bosma, Bosma, Bottema, Broeils, Bullock, Casertano, Catinella, Corradi, Côté, de Blok, de Blok, de Blok, de Blok, Ford, García-Ruiz, Garrido, Hunter, J. M. van der Hulst, Kent, Kent, Kregel, Kuzio de Naray, Marchesini, McGaugh, Navarro, Navarro, Noordermeer, Persic, Persic, Power, Puche, R. A. Swaters, R. Sancisi, Rhee, Rubin, Sancisi, Sicotte, Sicotte, Simon, Spekkens, Spekkens, Swaters, Swaters, Swaters, Swaters, Swaters, Swaters, Swaters, T. S. van Albada, Tully, van den Bosch, van den Bosch, Verheijen   +55 more
core   +2 more sources

A turbulence study in Dwarf Irregular galaxies [PDF]

Proceedings of the International Astronomical Union, 2006
AbstractWe present preliminary results of a Fourier transform power spectra analysis carried out on a sample of dwarf irregular galaxies and Local Group members. This project is intended to study turbulence and the ISM structure in irregulars as a class.
Margarita Valdez-Gutiérrez, Ivânio Puerari   +1 more
openaire   +1 more source

The Outer Edges of Dwarf Irregular Galaxies: Stars and Gas

, 2002
We have in recent years come to view dwarf galaxy evolution in the broader context of the cosmic evolution of large-scale structure. Dwarf galaxies, as the putative building blocks of hierarchical galaxy formation, and also as the most numerous galaxies ...
Hodge, P. W., Hunter, D. A., Oey, M. S.
core   +1 more source

Kinematics of the dwarf irregular galaxy GR8 [PDF]

Astronomy & Astrophysics, 2003
We present deep, high velocity resolution (~1.6 km/s) Giant Meterwave Radio Telescope HI 21cm synthesis images for the faint (M_B ~ -12.1) dwarf irregular galaxy GR8. We find that the velocity field of the galaxy shows a clear systematic large scale pattern, with a maximum amplitude ~10 km/s.
Begum, Ayesha, Chengalur, Jayaram N.
openaire   +2 more sources

100 Proof: H i Observations of 100 Nearby Dwarf Galaxies with the 100 m Green Bank Telescope

The Astronomical Journal
We describe the results of observations with the 100 m Robert C. Byrd Green Bank Telescope in the H i line of 105 nearby dwarf galaxies, 60 of which were discovered recently in the DESI Legacy Imaging Surveys.
Aleksandra E. Nazarova, John M. Cannon, Igor D. Karachentsev, Dmitry I. Makarov, Maksim I. Chazov, Lila Schisgal, William St. John   +6 more
doaj   +1 more source

A Young Star Cluster in the Leo a Galaxy

Open Astronomy, 2015
We report a serendipitous discovery of a star cluster in the dwarf irregular galaxy Leo A. Young age (~28 Myr) and low mass (~510 M⊙) estimates are based on the isochrone fit assuming a metallicity derived for HII regions (Z = 0.0007).
Stonkutė R., Narbutis D., Bridžius A., Leščinskaitė A., Vansevičius V.   +4 more
doaj   +1 more source

Modeling Solitonic Cores, Stabilization of Bar, and Suppression of Bar Dissolution in DDO 168 via GPP Formalism: A Detailed Analysis of Bose–Einstein Condensate/Fuzzy Dark Matter Halo Structure and Bar Dynamics in the Dwarf Galaxy DDO 168

The Astrophysical Journal
The cusp–core problem remains a challenge to the ΛCDM model, since dwarf galaxies often exhibit flat central density cores rather than the steep cusps ( ρ  ∝  r ^−1 ) predicted by collisionless N -body simulations.
Saroj Khanal, Sanjay Kumar Sah, Kiran Khanal, Sapana Khanal   +3 more
doaj   +1 more source

FIGGS: Faint Irregular Galaxies GMRT Survey

, 2007
The Faint Irregular Galaxies GMRT Survey (FIGGS) is a large program aimed at providing a comprehensive and statistically robust characterisation of the neutral ISM properties of faint (M_B > -14.5), nearby, gas rich, dwarf irregular galaxies using the ...
Begum, Ayesha, Chengalur, Jayaram N., Kaisin, S. S., Karachentsev, I. D., Sharina, Margarita   +4 more
core   +1 more source