Results 31 to 40 of about 37,027 (256)

The CO contents of dwarf irregular galaxies

The Astrophysical Journal, 1987
A search has been conducted for CO in 16 dwarf irregular galaxies selected to span a wide range of infrared luminosity and color. CO was detected in six dwarf galaxies spanning the entire range in optical color and IR luminosity. The dwarf galaxies extend by three orders of magnitude in luminosity the correlation between IR and CO luminosities found ...
TACCONI, LJ, Young, JS
openaire   +2 more sources

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

Diffuse Ionized Gas in the Dwarf Irregular Galaxy DDO 53

, 2007
The spectral characteristics throughout the dwarf irregular galaxy DDO 53 are studied. The results are very similar to those for other irregular galaxies: high excitation and low values of the [SII]/Halpha ratio.
A. M. Hidalgo-Gámez, Begum A., Benvenuti P., Caplan J., Dopita M. A., Hidalgo-Gamez A. M., Moles M., Olofsson K., Otte B., Pagel B. E. J., Pilyugin L. S., Schuster W. J., Stasinska G.   +12 more
core   +1 more source

A Revised Parallel-Sequence Morphological Classification of Galaxies: Structure and Formation of S0 and Spheroidal Galaxies [PDF]

, 2011
We update van den Bergh's parallel sequence galaxy classification in which S0 galaxies form a sequence S0a-S0b-S0c that parallels the sequence Sa-Sb-Sc of spiral galaxies.
Abramson, Arnaboldi, Arnaboldi, Arnaboldi, Arnaboldi, Arnaboldi, Baggett, Baldry, Bell, Bender, Bender, Bender, Bender, Bender, Bender, Bender, Bernardi, Binggeli, Binggeli, Binggeli, Blanton, Blanton, Boselli, Bullock, Buta, Buta, Buta, Buta, Buta, Böker, Böker, Chen, Chiboukas, Chung, Chung, Combes, Courteau, Côté, Da Costa, Davé, De Rijcke, de Souza, de Vaucouleurs, Djorgovski, Dressler, Faber, Ferguson, Ferrarese, Fisher, Freeland, Gavazzi, Geha, Geha, Geisler, Glass, Gonzalez, Graham, Graham, Graham, Grebel, Hamabe, Hinz, Hogg, Hogg, Hopkins, Hopkins, Hopkins, Hubble, Hurley-Keller, Ibata, Ibata, Ibata, Irwin, Jerjen, Jerjen, Jerjen, John Kormendy, Jørgensen, Karachentsev, Kazantzidis, Kelson, Kenney, Kenney, Kenney, Kirby, Komatsu, Kormendy, Kormendy, Kormendy, Kormendy, Kormendy, Kormendy, Kormendy, Kormendy, Kormendy, Kormendy, Kormendy, Kormendy, Kormendy, Kormendy, Kormendy, Kormendy, Kormendy, Krajnović, Krick, Lake, Larson, Laurikainen, Laurikainen, Li, Lisker, Lisker, Martin, Mateo, Mayer, Mayer, Mei, Merritt, Mihos, Mihos, Mihos, Milosavljević, Moore, Moore, Morgan, Mori, Naab, Neistein, Okamura, Oser, Oser, Peng, Pildis, Press, Ralf Bender, Robertson, Saglia, Saito, Sandage, Sandage, Sandage, Sandage, Sandage, Scorza, Sellwood, Shetrone, Shetrone, Shetrone, Shetrone, Simard, Strateva, Sérsic, Temi, Tolstoy, Tonnesen, Tonnesen, Tonnesen, Tonnesen, Tremaine, Tully, van Albada, van den Bergh, van den Bergh, van den Bergh, van den Bergh, van Dokkum, van Driel, van Gorkom, van Woerden, van Zee, Veilleux, Venn, Venn, Vikhlinin, Watt, Weinzirl, Weisz, Weisz, Welch, Williams, Williams, Wilman, Yoshida   +182 more
core   +3 more sources

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

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

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

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

Solid Harmonic Wavelet Bispectrum for Image Analysis

Advanced Science, EarlyView.
The Solid Harmonic Wavelet Bispectrum (SHWB), a rotation‐ and translation‐invariant descriptor that captures higher‐order (phase) correlations in signals, is introduced. Combining wavelet scattering, bispectral analysis, and group theory, SHWB achieves interpretable, data‐efficient representations and demonstrates competitive performance across texture,
Alex Brown, Mathilda Avirett‐Mackenzie, Carolin Villforth, Georgios Exarchakis   +3 more
wiley   +1 more source