Results 51 to 60 of about 705,440 (315)
Origin of the PN molecule in star-forming regions: the enlarged sample [PDF]
Monthly notices of the Royal Astronomical Society, 2019 Phosphorus nitride (PN) is the P-bearing species with the highest number of detections in star-forming regions. Multiline studies of the molecule have shown that the excitation temperature of PN is usually lower than the gas kinetic temperature ...
F. Fontani +6 more
semanticscholar +1 more source
Mapping Physical Conditions in Neighboring Hot Cores: NOEMA Studies of W3(H2O) and W3(OH)
The Astrophysical Journal, 2023 The complex chemistry that occurs in star-forming regions can provide insight into the formation of prebiotic molecules at various evolutionary stages of star formation.
Morgan M. Giese +3 more
doaj +1 more source
Super Star Clusters in SBS0335-052E [PDF]
, 2008 As one of the lowest metallicity star forming galaxies, with a nucleus of several super star clusters, SBS0335-052E is the subject of substantial current study.
Bekki +31 more
core +1 more source
The star-forming region in Cepheus A
The Astrophysical Journal, 1984 Resultats d'observations de Cep A a 2,1 cm et 6 cm. La condensation contient deux chapelets de regions H II d'environ 0,1 pc de longueur, produites par environ 14 etoiles ressemblant aux etoiles B3 de la sequence principale. Les regions H II sont tres jeunes, ∼10 3 ans et on suggere que l'environnement est controle par un champ ...
Hughes, V.A., Wouterloot, J.G.A.
openaire +4 more sources
Explaining the Chemical Inventory of Orion KL through Machine Learning
The Astrophysical Journal, 2023 The interplay of the chemistry and physics that exists within astrochemically relevant sources can only be fully appreciated if we can gain a holistic understanding of their chemical inventories. Previous work by Lee et al.
Haley N. Scolati +4 more
doaj +1 more source
The Effect of Local Galaxy Surface Density on Star Formation for HI selected galaxies [PDF]
, 2006 We present the result of investigations into two theories to explain the star formation rate-density relationship. For regions of high galaxy density, either there are fewer star forming galaxies, or galaxies capable of forming stars are present but some
Doyle, Marianne T. +1 more
core +3 more sources
The Astrophysical Journal, 2023 We report Atacama Large Millimeter/submillimeter Array (ALMA) high-resolution (≲0.3″) observations of water emission lines p -H _2 O(2 _02 − 1 _11 ), o -H _2 O(3 _21 − 3 _12 ), p -H _2 O(4 _22 − 4 _13 ), in the strongly lensed galaxy HATLASJ113526.2 ...
Francesca Perrotta +12 more
doaj +1 more source
The metallicity of circumnuclear star-forming regions [PDF]
, 2008 We present a spectrophotometric study of circumnuclear star forming regions (CNSFR) in the early type spiral galaxies: NGC 2903, NGC 3351 and NGC 3504, all of them of over solar metallicity according to standard empirical calibrations. A detailed determination of their abundances is made after careful subtraction of the very prominent underlying ...
A. I. Díaz +3 more
openaire +3 more sources
The Astrophysical Journal, 2023 We explore the potential of the Gaussian mixture model (GMM), an unsupervised machine-learning method, to identify coherent physical structures in the interstellar medium.
M. Tiwari +16 more
doaj +1 more source
CHEMICAL EVOLUTION OF STAR-FORMING REGIONS
Annual Review of Astronomy and Astrophysics, 1998 ▪ Abstract Recent advances in the understanding of the chemical processes that occur during all stages of the formation of stars, from the collapse of molecular clouds to the assemblage of icy planetesimals in protoplanetary accretion disks, are reviewed.
van Dishoeck, Ewine F. +1 more
openaire +6 more sources