Results 131 to 140 of about 176,382 (265)

The Local Ultraviolet to Infrared Treasury. II. Refining Star Formation Histories of 10 Metal-poor Dwarf Galaxies with Simultaneous UV-optical Two-CMD Fitting

The Astronomical Journal
We present the star formation histories (SFHs) of 10 metal-poor (≲12% Z _⊙ ), star-forming dwarf galaxies from the Local Ultraviolet to Infrared Treasury survey.
Yumi Choi, Karoline M. Gilbert, Benjamin F. Williams, Daniel R. Weisz, Evan D. Skillman, Julianne J. Dalcanton, Kristen B. W. McQuinn, Andrew E. Dolphin, Giada Pastorelli, Martha L. Boyer, Karl D. Gordon, Léo Girardi, Maude Gull   +12 more
doaj   +1 more source

Star formation in dwarf irregular galaxies NGC 6822

The Astronomical Journal, 1995
Our proposed method to study the star formation histories in nearby irregulars is here applied to NGC 6822. To this purpose we have obtained accurate CCD photometry of three regions in the galaxy, reaching V$\simeq$23.5 with an accuracy of $ _{BVR}\leq$0.1 mag.
Paola Focardi, Gianni Marconi, Laura Greggio, Monica Tosi   +3 more
openaire   +3 more sources

A γ-Ray-emitting Collisional Ring Galaxy System in Our Galactic Neighborhood

The Astrophysical Journal Letters
The astrophysical γ -ray photons carry the signatures of the violent phenomena happening on various astronomical scales in our Universe. This includes supernova remnants, pulsars, and pulsar wind nebulae in the Galactic environment and extragalactic ...
Vaidehi S. Paliya, D. J. Saikia
doaj   +1 more source

Detection of Metal Enrichment by SN 2011jm in NGC 4809

The Astrophysical Journal Letters
Cosmic metals are believed to originate from stellar and supernovae (SNe) nucleosynthesis, dispersed into the interstellar medium (ISM) through stellar winds and supernova explosions.
Yulong Gao, Qiusheng Gu, Ping Zhou, Yong Shi, Xiangdong Li   +4 more
doaj   +1 more source

Dwarf Irregular Galaxies and the Intergalactic Medium

, 1998
To be published in the proceedings of the XVI Cracow Summer School of Cosmology, 9 pages, no figures %in the University of Lodz ...
openaire   +2 more sources

What Does the LMC Look Like? It Depends on [M/H] and Age

The Astrophysical Journal
We offer a new way to look at the LMC through stellar mono-abundance and mono-age mono-abundance maps. These maps are based on ≳500,000 member stars with estimates of [M/H] ( σ _[M/H]  ~ 0.17) and age $({\sigma }_{{\rm{log}}\tau }\unicode{x0007E}0.15$ ),
Neige Frankel, Rene Andrae, Hans-Walter Rix, Joshua Povick, Vedant Chandra   +4 more
doaj   +1 more source

Conversion Problems: How (Not) to Determine Molecular Masses in Dwarf Galaxies [PDF]

arXiv, 2001
The determination of molecular gas masses in star forming dwarf irregular galaxies is crucial to assess the star formation process in these objects. But the derivation of the molecular gas content of dwarf galaxies has been a long-standing problem.
arxiv  

A neutral-hydrogen survey of the dwarf irregular galaxy Leo A [PDF]

, 1978
N. J. Allsopp
openalex   +1 more source

Cosmic ray feedback in galaxies and galaxy clusters: A pedagogical introduction and a topical review of the acceleration, transport, observables, and dynamical impact of cosmic rays. [PDF]

Astron Astrophys Rev, 2023
Ruszkowski M, Pfrommer C.
europepmc   +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