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We present new multi-frequency radio continuum imaging of the dwarf starburst galaxy NGC 625 obtained with the Very Large Array. Data at 20, 6, and 3.6 cm reveal global continuum emission dominated by free-free emission, with only mild…

Astrophysics · Physics 2009-11-10 John M. Cannon , Evan D. Skillman

New HST/WFPC2 imaging of the dwarf starburst galaxy NGC 625 is presented. These data, 80% complete to V and I magnitudes of 26.0 and 25.3, respectively, allow us to study the recent star formation history of NGC 625. We derive a tip of the…

VLA and Parkes 64 m radiotelescope 21-cm observations of the starburst dwarf galaxy NGC 5253 reveal a multi-component non-axisymmetric HI distribution. The component associated with the stellar body shows evidence for a small amount of…

Astrophysics · Physics 2009-11-13 Henry A. Kobulnicky , Evan. D. Skillman

Results from new HI synthesis observations of the nearby blue compact dwarf galaxy, NGC 2915, carried out on the Australian Telescope Compact Array are presented. High resolution HI moment maps for the galaxy reveal complex HI distributions…

Cosmology and Nongalactic Astrophysics · Physics 2009-11-09 E. C. Elson , W. J. G. de Blok , R. C. Kraan-Koretweg

We present new FUSE spectroscopy of the dwarf starburst galaxy NGC 625. These observations probe multiple phases of the interstellar medium, including the coronal, ionized, neutral and molecular gas. This nearby (D = 3.9 +/- 0.2 Mpc) system…

Astrophysics · Physics 2014-10-13 John M. Cannon , Evan D. Skillman , Kenneth R. Sembach , Dominik J. Bomans

(abridged) Here we present HI line and 20-cm radio continuum data of the nearby galaxy pair NGC1512/1510 as obtained with the Australia Telescope Compact Array. These are complemented by GALEX UV-, SINGG Halpha- and Spitzer mid-infrared…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 Baerbel S. Koribalski , Angel R. Lopez-Sanchez

Observations of the neutral atomic hydrogen (HI) in the nuclear starburst galaxy NGC 4945 with MeerKAT are presented. We find a large amount of halo gas, previously missed by HI observations, accounting for 6.8% of the total HI mass. This…

We investigate the dynamics of starbursting dwarf galaxies, using both new and archival HI observations. We consider 18 nearby galaxies that have been resolved into single stars by HST observations, providing their star formation history…

Astrophysics of Galaxies · Physics 2014-06-23 Federico Lelli , Marc Verheijen , Filippo Fraternali

We present the detection of an enormous disc of cool neutral hydrogen (HI) gas surrounding the S0 galaxy NGC 612, which hosts one of the nearest powerful radio sources (PKS 0131-36). Using the Australia Telescope Compact Array, we detect…

We present new atomic hydrogen (HI) observations of the collisional ring galaxy NGC 922 obtained using the Australia Telescope Compact Array. Our observations reveal for the first time the vast extent of the HI disc of this galaxy. The HI…

Astrophysics of Galaxies · Physics 2018-04-20 Ahmed Elagali , O. Ivy Wong , Se-Heon Oh , Lister Staveley-Smith , Bärbel S. Koribalski , Kenji Bekki , Martin Zwaan

The nearby blue compact dwarf, NGC 2915, has its stellar disc embedded in a large, extended (~ 22 B-band scale-lengths) HI disc. New high-resolution HI synthesis observations of NGC 2915 have been obtained with the Australia Telescope…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-27 E. C. Elson , W. J. G. de Blok , R. C. Kraan-Korteweg

Observations of the nearby starburst galaxy NGC 253 in the 21-cm line reveal the presence of neutral hydrogen in the halo, up to 12 kpc from the galactic plane. This extra-planar HI is found only in one half of the galaxy and is…

Abridged. Context. The metal content of dwarf galaxies and the metal enrichment of the intergalactic medium both suggest that mass loss from galaxies is a significant factor for the chemical evolution history of galaxies, in particular of…

We model the observed vertical distribution of the neutral hydrogen (HI) in the faint (M_B ~ -13.7 mag) edge-on dwarf irregular galaxy KK250. Our model assumes that the galaxy consists of axi-symmetric, co-planar gas and stellar discs in…

Astrophysics of Galaxies · Physics 2014-11-18 Narendra Nath Patra , Arunima Banerjee , Jayaram N. Chengalur , Ayesha Begum

We present HI line and 20-cm radio continuum observations of the NGC 1511 galaxy group obtained with the Australia Telescope Compact Array. The data reveal an extended, rather disturbed HI distribution for the peculiar starburst galaxy NGC…

Astrophysics · Physics 2009-11-10 B. Koribalski , E. Manthey

(Abridged) We present new, deep HI line and 20-cm radio continuum data of the very puzzling blue compact dwarf galaxy NGC 5253, obtained with the ATCA as part of the `Local Volume HI Survey' (LVHIS). Our low-resolution HI maps show the…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-30 Angel R. Lopez-Sanchez , Baerbel Koribalski , Janine van Eymeren , Cesar Esteban , Emma Kirby , Helmut Jerjen , Nyssa Lonsdale

We describe the results of observations with the 100m Robert C. Byrd Green Bank Telescope (GBT) in the HI line of 105 nearby dwarf galaxies, 60 of which were discovered recently in the DESI Legacy Imaging Surveys. Of 105 objects observed,…

We present the detection, performed with the Westerbork Synthesis Radio Telescope (WSRT) and the Karl Jansky Very Large Array (VLA), of a fast HI 21-cm outflow in the ultra-luminous infrared galaxy Mrk 231. The outflow is observed as…

Astrophysics of Galaxies · Physics 2016-09-07 Raffaella Morganti , Sylvain Veilleux , Tom Oosterloo , Stacy H. Teng , David Rupke

Using deep 21-cm HI data from the Green Bank Telescope we have detected an ~18.3 kpc-long gaseous extension associated with the starbursting dwarf galaxy IC 10. The newly-found feature stretches 1.3 deg to the northwest and has a large…

Strong bursts of star formation in galaxies may be triggered either by internal or external mechanisms. We study the distribution and kinematics of the HI gas in the outer regions of 18 nearby starburst dwarf galaxies, that have accurate…

Astrophysics of Galaxies · Physics 2015-06-22 Federico Lelli , Marc Verheijen , Filippo Fraternali
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