Results 61 to 70 of about 722,598 (307)

Magnetic fields in irregular galaxies [PDF]

Proceedings of the International Astronomical Union, 2008
AbstractThe low masses of irregular galaxies change the behavior of their interstellar medium (ISM) compared to that of normal spirals, so the role of magnetic fields in the ISM in irregulars may be very different than in spirals. We present high-resolution and high-sensitivity observations of the magnetic fields of two irregular galaxies: NGC 4214 and
Amanda A. Kepley, Timothy Robishaw, Uli Klein, Eric M. Wilcots, S. Mühle, John E. Everett, Carl Heiles, Ellen G. Zweibel   +7 more
openaire   +2 more sources

Distance and reddening of the Local Group dwarf irregular galaxy NGC 6822 [PDF]

, 2012
On the basis of a new photometric analysis of the Local Group dwarf irregular galaxy NCG 6822 based on observations obtained with the Advanced Camera for Surveys onboard the Hubble Space Telescope, we have obtained a new estimate of the extinction of two
F. Fusco, R. Buonanno, G. Bono, S. Cassisi, M. Monelli, A. Pietrinferni   +5 more
semanticscholar   +1 more source

THE CLUSTER POPULATION OF THE IRREGULAR GALAXY NGC 4449 AS SEEN BY THE HUBBLE ADVANCED CAMERA FOR SURVEYS [PDF]

, 2011
We present a study of the star cluster population in the starburst irregular galaxy NGC 4449 based on B, V, I, and Hα images taken with the Advanced Camera for Surveys on the Hubble Space Telescope. We derive cluster properties such as size, ellipticity,
F. Annibali, M. Tosi, A. Aloisi, R. P. van der Marel   +3 more
semanticscholar   +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.
Jayaram N. Chengalur, Ayesha Begum
openaire   +4 more sources

DEEP RADIO CONTINUUM IMAGING OF THE DWARF IRREGULAR GALAXY IC 10: TRACING STAR FORMATION AND MAGNETIC FIELDS [PDF]

, 2011
We exploit the vastly increased sensitivity of the Expanded Very Large Array to study the radio continuum and polarization properties of the post-starburst, dwarf irregular galaxy IC 10 at 6 cm, at a linear resolution of ∼50 pc.
V. Heesen, U. Rau, M. Rupen, E. Brinks, D. Hunter   +4 more
semanticscholar   +1 more source

CEERS Key Paper. III. The Diversity of Galaxy Structure and Morphology at z = 3–9 with JWST

The Astrophysical Journal Letters, 2023
We present a comprehensive analysis of the evolution of the morphological and structural properties of a large sample of galaxies at z = 3–9 using early James Webb Space Telescope (JWST) CEERS NIRCam observations. Our sample consists of 850 galaxies at z
Jeyhan S. Kartaltepe, Caitlin Rose, Brittany N. Vanderhoof, Elizabeth J. McGrath, Luca Costantin, Isabella G. Cox, L. Y. Aaron Yung, Dale D. Kocevski, Stijn Wuyts, Henry C. Ferguson, Micaela B. Bagley, Steven L. Finkelstein, Ricardo O. Amorín, Brett H. Andrews, Pablo Arrabal Haro, Bren E. Backhaus, Peter Behroozi, Laura Bisigello, Antonello Calabrò, Caitlin M. Casey, Rosemary T. Coogan, M. C. Cooper, Darren Croton, Alexander de la Vega, Mark Dickinson, Adriano Fontana, Maximilien Franco, Andrea Grazian, Norman A. Grogin, Nimish P. Hathi, Benne W. Holwerda, Marc Huertas-Company, Kartheik G. Iyer, Shardha Jogee, Intae Jung, Lisa J. Kewley, Allison Kirkpatrick, Anton M. Koekemoer, James Liu, Jennifer M. Lotz, Ray A. Lucas, Jeffrey A. Newman, Camilla Pacifici, Viraj Pandya, Casey Papovich, Laura Pentericci, Pablo G. Pérez-González, Jayse Petersen, Nor Pirzkal, Marc Rafelski, Swara Ravindranath, Raymond C. Simons, Gregory F. Snyder, Rachel S. Somerville, Elizabeth R. Stanway, Amber N. Straughn, Sandro Tacchella, Jonathan R. Trump, Jesús Vega-Ferrero, Stephen M. Wilkins, Guang Yang, Jorge A. Zavala   +61 more
doaj   +1 more source

Stellar Populations of the Sagittarius Dwarf Irregular Galaxy [PDF]

, 1999
We present deep BVRI CCD photometry of the stars in the dwarf irregular galaxy SagDIG. The color-magnitude diagrams of the measured stars in SagDIG show a blue plume which consists mostly of young stellar populations, and a well-defined red giant branch (
Bertelli G., Cardelli J. A., Cesarsky D. A., Cousins A. W. J., Lee M. G., Longmore A. J., Lyo A.-R., Myung Gyoon Lee, Sang Chul Kim, Skillman E. D.   +9 more
core   +4 more sources

Emission spectrum of ionized gas in the irregular galaxy Holmberg II [PDF]

, 2012
We study the ionized gas spectrum of star forming regions in the Holmberg II galaxy using the optical long-slit spectroscopic observations made at the 6-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences (SAO RAS). We
O. Egorov, T. Lozinskaya, A. Moiseev
semanticscholar   +1 more source

Automatic Detection of Galaxy Type From Datasets of Galaxies Image Based on Image Retrieval Approach

Scientific Reports, 2017
This paper presents a new approach for the automatic detection of galaxy morphology from datasets based on an image-retrieval approach. Currently, there are several classification methods proposed to detect galaxy types within an image.
Mohamed Abd El Aziz, I. M. Selim, Shengwu Xiong   +2 more
doaj   +1 more source

What Does the Milky Way Look Like?

The Astrophysical Journal, 2023
In spite of much work, the overall spiral structure morphology of the Milky Way remains somewhat uncertain. In the last two decades, accurate distance measurements have provided us with an opportunity to solve this issue.
Y. Xu, C. J. Hao, D. J. Liu, Z. H. Lin, S. B. Bian, L. G. Hou, J. J. Li, Y. J. Li   +7 more
doaj   +1 more source