Results 61 to 70 of about 611,346 (300)

Chemical behavior of the dwarf irregular galaxy NGC6822. Its PN and HII region abundances [PDF]

, 2009
Aims. We aim to derive the chemical behavior of a significant sample of PNe and HII regions in the irregular galaxy NGC 6822. The selected objects are distributed in different zones of the galaxy.
L. Hernández-Martínez, M. Peña, L. Carigi, J. García-Rojas   +3 more
semanticscholar   +1 more source

Cosmic-ray driven dynamo in the medium of irregular galaxy [PDF]

, 2009
We investigate the cosmic ray driven dynamo in the interstellar medium of irregular galaxy. The observations (Chyzy et al. 2000, 2003) show that the magnetic field in irregular galaxies is present and its value reaches the same level as in spiral ...
Chyży, Chyży, Dominik Bomans, Hanasz, Hubert Siejkowski, Katarzyna Otmianowska-Mazur, Marian Soida, Michał Hanasz   +7 more
core   +6 more sources

Magnetic Fields in Irregular Galaxies [PDF]

Highlights of Astronomy, 2002
AbstractRadio data of large irregular galaxies reveal some extended synchrotron emission with a substantial degree of polarization. In the case of NGC 4449 strong galaxy-scale regular magnetic fields were found, in spite of the lack of ordered rotation required for the conventional dynamo action.
openaire   +1 more source

Witnessing a Transformation to Blue-cored Dwarf Early-type Galaxies in Filaments and the Cluster Outskirts: Gas-phase Abundances and Internal Kinematics Perspectives

The Astrophysical Journal, 2023
The presence of transitional dwarf galaxies in filaments and cluster outskirts may be closely related to preprocessing in the filament; however, the underlying mechanism is not yet comprehensively understood.
Jiwon Chung, Joon Hyeop Lee, Hyunjin Jeong, Suk Kim   +3 more
doaj   +1 more source

Intrinsic galaxy shapes and alignments I: Measuring and modelling COSMOS intrinsic galaxy ellipticities [PDF]

, 2013
The statistical properties of the ellipticities of galaxy images depend on how galaxies form and evolve, and therefore constrain models of galaxy morphology, which are key to the removal of the intrinsic alignment contamination of cosmological weak ...
Abraham, Allgood, Altay, B. Joachimi, Bailin, Bailin, Bartelmann, Bernstein, Bernstein, Bertin, Bett, Bett, Bett, Bildfell, Binggeli, Binney, Bower, Brainerd, Bridle, Bridle, Bundy, Catelan, Cole, Croft, Davis, E. Semboloni, Erben, Faltenbacher, Fukugita, H. Hoekstra, Hahn, Hahn, Hao, Harker, Heavens, Heymans, Heymans, Hilbert, Hirata, Hoekstra, Hung, Ilbert, J. Hartlap, Jing, Joachimi, Joachimi, Joachimi, Joachimi, Kaiser, Kazantzidis, King, King, Kitching, Knebe, Knebe, Komatsu, Kuhlen, Lambas, Laureijs, Leauthaud, Lee, Mandelbaum, Mandelbaum, Melchior, Mobasher, P. E. Bett, P. Schneider, Parry, Percival, Pereira, Refregier, Rhodes, S. Hilbert, Scarlata, Schneider, Schrabback, Scoville, Spergel, Springel, Springel, T. Schrabback, Takada, van den, van Uitert, Zhang   +84 more
core   +2 more sources

Stellar population of the irregular galaxy IC 10 [PDF]

, 2009
Based on our observations with the 6-m BTA telescope at the Special Astrophysical Observatory, the Russian Academy of Sciences, and archival Hubble Space Telescope images, we have performed stellar photometry for several regions of the irregular galaxy ...
N. Tikhonov, O. Galazutdinova
semanticscholar   +1 more source

A Survey of Galaxy Pairs in the SDSS Photometric Images based on Faster-RCNN

The Astronomical Journal
Galaxy pairs hold significant importance in understanding the evolution of galaxies, and the extensive search for a large sample of galaxy pairs is meaningful.
Chen-hui Shi, Hai-feng Yang, Jiang-hui Cai, Li-chan Zhou, Yan-ting He, Mei-hong Su, Xu-jun Zhao, Ya-ling Xun   +7 more
doaj   +1 more source

The Dwarf Irregular Galaxy UGC 7636 Exposed: Stripping At Work In The Virgo Cluster

, 1999
We present the results of optical spectroscopy of a newly discovered H II region residing in the H I gas cloud located between the dwarf irregular galaxy UGC 7636 and the giant elliptical galaxy NGC 4472 in the Virgo Cluster.
Binggeli B., Edge A. C., Henning P. A., Henry Lee, Le Fevre O., Marshall L. McCall, Michael G. Richer, Pagel B. E. J., Schindler S.   +8 more
core   +1 more source

The Stellar Populations of NGC 3109: Another Dwarf Irregular Galaxy with a Population II Stellar Halo [PDF]

, 1998
We have obtained V and I-band photometry for about 17500 stars in the field of the dwarf irregular galaxy NGC3109, located in the outskirts of the Local Group.
Albert A. Zijlstra,, Bertelli G., Chiosi C., Dante Minniti, Hodge P., M. Victoria Alonso, Zijlstra A. A.   +6 more
core   +2 more sources

The faint outer regions of the Pegasus dwarf irregular galaxy: A much larger and undisturbed galaxy [PDF]

, 2009
We investigate the spatial extent and structure of the Pegasus dwarf irregular galaxy (PegDIG) using deep, wide-field, multicolour CCD photometry from the Sloan Digital Sky Survey (SDSS) and new deep H I observations.
A. Kniazev, N. Brosch, G. L. Hoffman, E. Grebel, D. Zucker, S. A. P. Saao, South Africa Salt Foundation, South Africa Steward Observatory, Israel Lafayette College, Usa University of Heidelberg, G. I. F. Astronomy, UK Macquarie University, A. A. Observatory, A. S. Ras, Russia.   +14 more
semanticscholar   +1 more source