Results 61 to 70 of about 596,014 (258)

ON THE RADIAL EXTENT OF THE DWARF IRREGULAR GALAXY IC10 [PDF]

, 2010
We present new deep and accurate space (Advanced Camera for Surveys–Wide Field Planetary Camera 2 on board the Hubble Space Telescope) and ground-based (Suprime-Cam at Subaru Telescope, Mega-Cam at Canada–France–Hawaii Telescope) photometric and ...
N. Sanna, G. Bono, P. Stetson, I. Ferraro, M. Monelli, M. Nonino, P. Moroni, R. Bresolin, R. Buonanno, Filippina Caputo, M. Cignoni, M. Cignoni, S. Degl'innocenti, G. Iannicola, Noriyuki Matsunaga, A. Pietrinferni, M. Romaniello, J. Storm, A. Walker   +18 more
semanticscholar   +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

THE ACS LCID PROJECT. II. FAINT VARIABLE STARS IN THE ISOLATED DWARF IRREGULAR GALAXY IC 1613 [PDF]

, 2010
We present the results of a new search for variable stars in the Local Group (LG) isolated dwarf galaxy IC 1613, based on 24 orbits of F475W and F814W photometry from the Advanced Camera for Surveys (ACS) on board the Hubble Space Telescope.
E. Bernard, M. Monelli, C. Gallart, A. Aparicio, S. Cassisi, I. Drozdovsky, S. Hidalgo, E. Skillman, P. Stetson   +8 more
semanticscholar   +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

Deep CO Observations and the CO-to-H2 Conversion Factor in DDO 154, a Low Metallicity Dwarf Irregular Galaxy [PDF]

, 2010
We present a deep spectroscopic search for CO emission in the dwarf irregular galaxy DDO 154, which has an Oxygen abundance of only 1=20 of the solar value.
S. Komugi, C. Yasui, N. Kobayashi, B. Hatsukade, K. Kohno, Y. Sofue, Shiori Kyu   +6 more
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

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

A review of multiscale numerical modeling of rock mechanics and rock engineering

Deep Underground Science and Engineering, EarlyView.
Multiscale numerical methods of rock mechanics and rock engineering are reviewed, and the review results show that more attention should be paid to the development of an advanced constitutive model in addition to numerical techniques themselves. Abstract Rock is geometrically and mechanically multiscale in nature, and the traditional phenomenological ...
Xindong Wei, Zhe Li, Gaofeng Zhao
wiley   +1 more source

SAGAbg. I. A Near-unity Mass-loading Factor in Low-mass Galaxies via Their Low-redshift Evolution in Stellar Mass, Oxygen Abundance, and Star Formation Rate

The Astrophysical Journal
Measuring the relation between star formation and galactic winds is observationally difficult. In this work we make an indirect measurement of the mass-loading factor (the ratio between the mass outflow rate and star formation rate) in low-mass galaxies ...
Erin Kado-Fong, Marla Geha, Yao-Yuan Mao, Mithi A. C. de los Reyes, Risa H. Wechsler, Yasmeen Asali, Nitya Kallivayalil, Ethan O. Nadler, Erik J. Tollerud, Benjamin Weiner   +9 more
doaj   +1 more source

Giant Halos in Dwarf Irregular Galaxies vs. Dwarf Elliptical Galaxies

, 2005
We present a discovery of a giant stellar halo in NGC 6822, a dwarf irregular galaxy in the Local Group. This halo is mostly made of old red giants, showing striking features: 1) it is several times larger than the main body of the galaxy seen in the ...
Hwang, Narae, Lee, Myung Gyoon
core   +1 more source