Results 1 to 10 of about 100,003 (312)

Star formation rate in Holmberg IX dwarf galaxy [PDF]

open access: yesSerbian Astronomical Journal, 2011
In this paper we use previously determined Hα fluxes for dwarf galaxy Holmberg IX (Arbutina et al. 2009) to calculate star formation rate (SFR) in this galaxy.
Anđelić M.M.
doaj   +1 more source

Revealing the Galaxy–Halo Connection through Machine Learning

open access: yesThe Astrophysical Journal, 2023
Understanding the connections between galaxy stellar mass, star formation rate, and dark matter halo mass represents a key goal of the theory of galaxy formation. Cosmological simulations that include hydrodynamics, physical treatments of star formation,
Ryan Hausen   +7 more
doaj   +1 more source

Early-forming Massive Stars Suppress Star Formation and Hierarchical Cluster Assembly

open access: yesThe Astrophysical Journal, 2023
Feedback from massive stars plays an important role in the formation of star clusters. Whether a very massive star is born early or late in the cluster formation timeline has profound implications for the star cluster formation and assembly processes. We
Sean C. Lewis   +10 more
doaj   +1 more source

The Origin of Low-redshift Event Rate Excess as Revealed by the Low-luminosity Gamma-Ray Bursts

open access: yesThe Astrophysical Journal, 2023
The relation between the event rate of long gamma-ray bursts and the star formation rate is still controversial, especially at the low-redshift end. Dong et al.
X. F. Dong   +4 more
doaj   +1 more source

The Gas Accretion Rate of Galaxies over z ≈ 0–1.3

open access: yesThe Astrophysical Journal Letters, 2023
We present here estimates of the average rates of accretion of neutral gas onto main-sequence galaxies and the conversion of atomic gas to molecular gas in these galaxies at two key epochs in galaxy evolution: (i) z ≈ 1.3–1.0, toward the end of the epoch
Aditya Chowdhury   +2 more
doaj   +1 more source

Do Multi-Structural One-Off FRBs Trace Similar Cosmology History with Repeaters?

open access: yesUniverse, 2023
Fast Radio Bursts (FRBs) are millisecond-duration transient events that are typically observed at radio wavelengths and cosmological distances but their origin remains unclear.
Yuhao Zhu   +9 more
doaj   +1 more source

Properties of the Environment of Galaxies in Clusters of Galaxies CL 0024+1654 and RX J0152.7−1357

open access: yesJournal of Mathematical and Fundamental Sciences, 2021
We report the results of combined analyses of X-ray and optical data of two galaxy clusters, CL 0024+1654 and RX J0152.7−1357 at redshift z = 0.395 and z = 0.830, respectively, offering a holistic physical description of the two clusters.
Premana Wardayanti Premadi   +2 more
doaj   +1 more source

The Gas Accretion Rate of Star-forming Galaxies over the Last 4 Gyr

open access: yesThe Astrophysical Journal Letters, 2023
Star-forming galaxies are believed to replenish their atomic gas reservoir, which is consumed in star formation, through accretion of gas from their circumgalactic mediums (CGMs).
Apurba Bera   +3 more
doaj   +1 more source

Outer Rings in Early-Type Disk Galaxies: Star Formation Rate

open access: yesOpen Astronomy, 2016
The total ring star formation rates and their surface densities are determined for 34 early-type disk galaxies with outer stellar rings which were detected in the UV with the GALEX space telescope. The total level of the integrated star formation rate in
Kostiuk I. P., Sil’chenko O. K.
doaj   +1 more source

Molecular Clouds and Star Formation Rate in Disk Galaxies

open access: yesOpen Astronomy, 2016
We use N-body/hydrodynamic simulations of a Milky Way-like galaxy to study the physical properties of giant molecular clouds and star formation rate on different spatial scales.
Vasiliev E. O.   +2 more
doaj   +1 more source

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