Results 21 to 30 of about 4,646,373 (300)

Formation of the first stars [PDF]

open access: yesProceedings of 11th Symposium on Nuclei in the Cosmos — PoS(NIC XI), 2005
Review, revised version; now in print, Rep. Prog. Phys. (2013), 52 pages, 14 figures (for high-resolution, please see the journal)
openaire   +6 more sources

Quenching of Star Formation [PDF]

open access: yesAIP Conference Proceedings, 2008
In the last decade we have seen an enormous increase in the size and quality of spectroscopic galaxy surveys, both at low and high redshift. New statistical techniques to analyse large portions of galaxy spectra are now finding favour over traditional index based methods. Here we will review a new robust and iterative Principal Component Analysis (PCA)
Vivienne Wild   +8 more
openaire   +3 more sources

A multi-scale study of the star formation law in nearby galaxies [PDF]

open access: yes, 2020
>Magister Scientiae - MScThis research aimed to evaluate the effects of changing length-scales on the star formation laws and star formation efficiencies for our selected sample of galaxies.
Isaacs, Narusha
core   +1 more source

Modeling Two First Hydrostatic Core Candidates Barnard 1b-N and 1b-S

open access: yesThe Astrophysical Journal, 2023
A first hydrostatic core (FHC) is proposed to form after the initial collapse of a prestellar core, as a seed of a Class 0 protostar. FHCs are difficult to observe because they are small, compact, embedded, and short lived.
Hao-Yuan Duan   +3 more
doaj   +1 more source

Triple Spiral Arms of a Triple Protostar System Imaged in Molecular Lines

open access: yesThe Astrophysical Journal, 2023
Most stars form in multiple-star systems. For a better understanding of their formation processes, it is important to resolve the individual protostellar components and the surrounding envelope and disk material at the earliest possible formation epoch ...
Jeong-Eun Lee   +11 more
doaj   +1 more source

Massive star and star cluster formation [PDF]

open access: yesProceedings of the International Astronomical Union, 2006
AbstractI review the status of massive star formation theories: accretion from collapsing, massive, turbulent cores; competitive accretion; and stellar collisions. I conclude the observational and theoretical evidence favors the first of these models.
openaire   +2 more sources

One, Two, Three ... An Explosive Outflow in IRAS 12326-6245 Revealed by ALMA

open access: yesThe Astrophysical Journal Letters, 2023
In the last years there has been a substantial increase in the number of the reported massive and luminous star-forming regions with related explosive outflows thanks to the superb sensitivity and angular resolution provided by the new radio, infrared ...
Luis A. Zapata   +8 more
doaj   +1 more source

Redshift distribution of gamma-ray bursts and star formation rate [PDF]

open access: yes, 2006
Aims. The redshift distribution of gamma-ray bursts collected in the BATSE Catalog is compared with the star formation rate.We aim to clarify the accordance between them. We also study the case of comoving number density of bursts monotonously increasing
Bagoly, Zsolt   +19 more
core   +1 more source

Urea‐injection and ‐preparation in Diesel applications, Multiphase multicomponent modeling using Star‐CD

open access: yes, 2010
The most promising approach to fulfill the Diesel engine´s future NOx‐emission limits is exhaust gas aftertreatment with the Selective Catalytic Reduction (SCR). The state‐of‐the‐art approach in automotive technology is the supply
Lauer, Thomas, Fischer, Simon
core   +4 more sources

PHANGS: constraining star formation time-scales using the spatial correlations of star clusters and giant molecular clouds

open access: yes, 2023
In the hierarchical view of star formation, giant molecular clouds (GMCs) undergo fragmentation to form small-scale structures made up of stars and star clusters.
Turner, Jordan A;Dale, Daniel A;Lilly, James;..., Hsi-An Pan et al.
core   +1 more source

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