Results 111 to 120 of about 36,487 (213)

Discovery of Metal-poor and Distant Pre–Main Sequence Candidates in WLM with JWST

The Astrophysical Journal Letters
We present the discovery of 12 metal-poor and ​​​distant pre–main sequence (PMS) candidates in the dwarf irregular galaxy Wolf–Lundmark–Melotte ∼968 kpc away, at a present-day metallicity of [Fe/H] ∼ –0.9.
Venu M. Kalari, Ricardo Salinas, Morten Andersen, Guido De Marchi, Monica Rubio, Jorick S. Vink, Hans Zinnecker   +6 more
doaj   +1 more source

The JWST Resolved Stellar Populations Early Release Science Program. VIII. The Spatially Resolved Star Formation History of WLM

The Astrophysical Journal
Radial stellar population gradients within dwarf galaxies provide a promising avenue for disentangling the drivers of galaxy evolution, including environment. Within the Local Volume, radial stellar age gradient slopes correlate with interaction history,
Roger E. Cohen, Kristen B. W. McQuinn, Alessandro Savino, Max J. B. Newman, Daniel R. Weisz, Andrew E. Dolphin, Martha L. Boyer, Matteo Correnti, Marla C. Geha, Mario Gennaro, Karoline M. Gilbert, Nitya Kallivayalil, Jack T. Warfield, Benjamin F. Williams, Alyson M. Brooks, Andrew A. Cole, Evan D. Skillman, Christopher T. Garling, Jason S. Kalirai, Jay Anderson   +19 more
doaj   +1 more source

Measuring Resolved Star Formation Histories from High-precision Color–Magnitude Diagrams with StarFormationHistories.jl

The Astrophysical Journal Supplement Series
Understanding how and when galaxies formed stars over the history of the Universe is fundamental to the study of galaxy evolution. The star formation histories (SFHs) of galaxies in the local Universe can be measured with high precision using deep ...
Christopher T. Garling, Nitya Kallivayalil, Kristen B. W. McQuinn, Jack T. Warfield, Mario Gennaro, Roger E. Cohen   +5 more
doaj   +1 more source

Anomalous emission regions in irregular galaxies

The Astrophysical Journal, 1984
On presente des observations spectrophotometriques de regions des galaxies irregulieres NGC 3738, 4214 et 4449. Les regions HII ont des rapports [OII]3727/[OIII]5007 2.
openaire   +1 more source

Galaxy Ultraviolet Legacy Project: Survey Description and First Insights into NGC 4449 Recent History of Star Formation

The Astrophysical Journal
The Galaxy UV Legacy Project (GULP) is a Cycle 28 Treasury program with the Hubble Space Telescope designed to characterize resolved massive stars, OB associations, and young star clusters in 26 nearby star-forming galaxies. Utilizing the Advanced Camera
E. Sabbi, B. Meena, P. Zeidler, V. Bajaj, D. Calzetti, J. J. Eldridge, P. Facchini, S. Linden, P. A. Crowther, A. Adamo, L. Bianchi, M. Cignoni, B. G. Elmegreen, D. M. Elmegreen, J. S. Gallagher III, M. Gennaro, E. K. Grebel, R. S. Klessen, A. Pasquali, L. J. Smith, A. Wofford   +20 more
doaj   +1 more source

Mock Observations: Morphological Analysis of Galaxies in TNG100 Simulations

The Astrophysical Journal Supplement Series
In this study, we investigate the morphology of galaxies in the TNG100 simulation by applying mock observation techniques and compare the results with the observational data from the Sloan Digital Sky Survey (SDSS).
Jun-Yu Gong, Weipeng Lin, Lin Tang, Yanyao Lan   +3 more
doaj   +1 more source

Emergence of the Galaxy Morphology–Star Formation Activity–Clustercentric Radius Relations in Galaxy Clusters

The Astrophysical Journal
We investigate when and how the relations of galaxy morphology and star-forming activity with clustercentric radius become evident in galaxy clusters. We identify 162 galaxy clusters with total mass ${{M}}_{\mathrm{tot}}^{\mathrm{cl}}\gt 5\times {10}^{13}
Sungwook E. Hong, Changbom Park, Preetish K. Mishra, Juhan Kim, Brad K. Gibson, Yonghwi Kim, C. Gareth Few, Christophe Pichon, Jihye Shin, Jaehyun Lee   +9 more
doaj   +1 more source

Empirical dependencies for irregular dwarf galaxies

Astronomical and Astrophysical Transactions
In this work, we search for empirical relationships for irregular dwarf galaxies using a collection of observational data published in the NASA and HyperLeda databases. Using a complex statistical analysis, we calculated correlation coefficients between various physical parameters of irregular dwarf galaxies.
Tillaboev, K., Tadjibaev, I., Otojanova, N.   +2 more
openaire   +2 more sources

Discussion on Irregular Galaxies [PDF]

Symposium - International Astronomical Union, 1978
openaire   +1 more source

COSMIC-L: A Photometric Catalog of Observed Stars in the Large Magellanic Cloud

The Astrophysical Journal Supplement Series
The Magellanic Clouds are two nearby dwarf irregular galaxies, the study of which can help us in understanding galaxy and stellar evolution. In particular, the Large Magellanic Cloud, the larger one, contains approximately 30 billion stars at various ...
Antonio Franco, Achille A. Nucita, Francesco De Paolis, Francesco Strafella   +3 more
doaj   +1 more source