Results 31 to 40 of about 418,206 (216)

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

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

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

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

Structure of the dwarf irregular galaxy leo a. [PDF]

, 2017
Structure of the Dwarf Irregular Galaxy Leo ...
Leščinskaitė, Alina,
core  

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

The Bochum Survey of the Southern Galactic Disk: IV. Multi‐Band Photometry

Astronomische Nachrichten, EarlyView.
ABSTRACT The Southern Galactic Disk Survey (GDS) monitored a mosaic of 268 fields along a 6°‐wide stripe in the southern galactic disk from September 2010 to September 2019. These fields were observed between 21 and 407 times sim r′$$ {r}^{\prime } $$ultaneously in (8mag≲r′≲18mag$$ 8\kern0.6em \mathrm{mag}\lesssim {r}^{\prime}\lesssim 18\kern0.6em ...
Julia Blex, Dominik J. Bomans, Kerstin Weis, Markus Demleitner, Moritz Hackstein, Anna Franckowiak, Michael Ramolla, Christian Westhues, Christofer Fein, Rolf Chini   +9 more
wiley   +1 more source

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

, 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.
M. Peña, L. Hernández-Martínez, J. García-Rojas, L. Carigi   +3 more
core   +1 more source

Galaxy And Mass Assembly (GAMA) : the galaxy luminosity function within the cosmic web [PDF]

, 2015
EE acknowledges support from the Science and Technology Facilities Council. TMR acknowledges support from a ERC Starting Grant (DEGAS-259586). CH acknowledges support from the ERC under the EC FP7 grant number 240185.
Loveday, J, Baldry, I., E Eardley (16219808), T McNaught-Roberts (16161611), Driver, S. P., M E Cluver (16161572), M Alpaslan (16114469), I Baldry (16191140), Robotham, ASG, Robotham, A., Liske, J, Jonathan Loveday (4460899), Norberg, P, Driver, S.P., Eardley, E, Brough, S ; https://orcid.org/, Alpaslan, M., J Bland-Hawthorn (16111139), D J Farrow (16219811), Farrow, DJ, A S G Robotham (16143614), McNaught-Roberts, T., Brough, S., Loveday, J., Driver, SP, Liske, J., Farrow, D., Heymans, C, P Norberg (16143575), Peacock, JA, Alpaslan, M, J A Peacock (16045217), Robotham, A. S. G., Heymans, C., Bland-Hawthorn, J., Farrow, D. J., Bland-Hawthorn, J, Robotham, A.S.G., Baldry, I, Farrow, D.J., Peacock, J. A., Cluver, M., Driver, S., S Brough (16143590), McNaught-Roberts, T, Peacock, J.A., Norberg, P., J Liske (7814738), Eardley, E., Cluver, ME, Peacock, J., Cluver, M.E., C Heymans (16161599), Cluver, M. E., S P Driver (16143581), Brough, S, Baldry, IK   +56 more
core   +1 more source

Global properties of irregular galaxies

The Astrophysical Journal Supplement Series, 1982
We present optical and radio observations of global properties for a sample of noninteracting irregular galaxies and a few comparison objects. Program galaxies were chosen primarily on the basis of their blue colors and thus may be expected to represent systems with high rates of star formation.
D. A. Hunter, J. S. Gallagher, D. Rautenkranz   +2 more
openaire   +1 more source