Results 31 to 40 of about 12,408 (264)

Rotationally Supported Virgo Cluster Dwarf Elliptical Galaxies: Stripped Dwarf Irregular Galaxies?

The Astronomical Journal, 2004
New observations of 16 dwarf elliptical galaxies in the Virgo Cluster indicate that at least seven dEs have significant velocity gradients along their optical major axis, with typical rotation amplitudes of 20-30 km/s. Of the remaining nine galaxies in this sample, 6 have velocity gradients less than 20 km/s kpc^{-1} while the other 3 observations had ...
van Zee, L., Skillman, E. D., Haynes, M. P.   +2 more
openaire   +2 more sources

H i Clouds in LITTLE THINGS Dwarf Irregular Galaxies [PDF]

The Astronomical Journal, 2019
Abstract We identify 814 discrete H i clouds in 40 dwarf irregular galaxies from the LITTLE THINGS survey using an automated cloud-finding algorithm. The cloud masses range from ∼103 to 107 M ⊙, have a surface density averaged over all of the clouds of ∼9.65 M ⊙ pc−2, and constitute 2%
Deidre A. Hunter, Bruce G. Elmegreen, Clara L. Berger   +2 more
openaire   +2 more sources

DDO 43: A Prototypical Dwarf Irregular Galaxy? [PDF]

The Astronomical Journal, 2005
We present sensitive and high resolution 21 cm observations of the dwarf irregular (dIm) galaxy DDO 43, in conjunction with optical broad and narrow band images in U, B, V, and Halpha. The observations are used to examine the relationship between its HI morphology and kinematics to past and present star formation.
Simpson, Caroline E., Hunter, Deidre A., Nordgren, Tyler E.   +2 more
openaire   +2 more sources

New Probable Dwarf Galaxies in Northern Groups of the Local Supercluster [PDF]

, 2007
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.
A. Klypin, B. Binggeli, D. I. Makarov, D. J. Pisano, D. J. Schlegel, E. Briggs, F. Zwicky, G. Vaucouleurs de, I. D. Karachentsev, I. D. Karachentsev, I. D. Karachentsev, I. D. Karachentsev, I. D. Karachentsev, I. D. Karachentsev, J. M. Shombert, N. Trentham, N. Trentham, R. M. Cutrie, S. Stierwalt, S. T. Gottesman, V. E. Karachentseva, V. E. Karachentseva, V. E. Karachentseva, W. K. Huchtmeier   +23 more
core   +1 more source

The intrinsic shapes of dwarf irregular galaxies [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2013
Abstract We use the measured B-band axial ratios of galaxies from an updated catalogue of Local Volume galaxies to determine the intrinsic shape of dwarf irregular galaxies (de Vaucouleurs’ morphological types 8–10). We find that the shapes change systematically with luminosity, with fainter galaxies being thicker.
Roychowdhury, Sambit, Chengalur, Jayaram N., Karachentsev, Igor D., Kaisina, Elena I.   +3 more
openaire   +3 more sources

Dark satellites and the morphology of dwarf galaxies [PDF]

, 2012
One of the strongest predictions of the LambdaCDM cosmological model is the presence of dark satellites orbiting all types of galaxies. We focus here on the dynamical effects of such satellites on disky dwarf galaxies, and demonstrate that these ...
Bergvall, Blanton, Font, Geha, Hopkins, Karachentsev, Kazantzidis, Kazantzidis, McGaugh, Mo, Moore, Moster, Purcell, Robertson, Starkenburg, Walker, Yoachim   +16 more
core   +2 more sources

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

MobiCOP: A Scalable and Reliable Mobile Code Offloading Solution

Wireless Communications and Mobile Computing, Volume 2018, Issue 1, 2018., 2018
Code offloading is a popular technique for extending the natural capabilities of mobile devices by migrating processor‐intensive tasks to resource‐rich surrogates. Despite multiple platforms for offloading being available in academia, these frameworks have yet to permeate the industry.
José I. Benedetto, Guillermo Valenzuela, Pablo Sanabria, Andrés Neyem, Jaime Navón, Christian Poellabauer, Konstantinos E. Psannis   +6 more
wiley   +1 more source

Catching Tidal Dwarf Galaxies at a Later Evolutionary Stage with ALFALFA

The Astronomical Journal, 2023
We present deep optical imaging and photometry of four objects classified as “Almost-Dark” galaxies in the Arecibo Legacy Fast Arecibo L-band Feed Array (ALFALFA) survey because of their gas-rich nature and extremely faint or missing optical emission in ...
Laurin M. Gray, Katherine L. Rhode, Lukas Leisman, Pavel E. Mancera Piña, John M. Cannon, John J. Salzer, Lexi Gault, Jackson Fuson, Gyula I. G. Józsa, Elizabeth A. K. Adams, Nicholas J. Smith, Martha P. Haynes, Steven Janowiecki, Hannah J. Pagel   +13 more
doaj   +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