Matches in SemOpenAlex for { <https://semopenalex.org/work/W2126857100> ?p ?o ?g. }
Showing items 1 to 76 of
76
with 100 items per page.
- W2126857100 abstract "Abstract Edge Clouds 1 and 2 (EC1 and EC2) are large molecular clouds with the largest galactocentric distances known to exist in the Milky Way. We present observations of these clouds and use them to determine physical characteristics. For EC2 we calculate a gas temperature of 20 K and a density of n (H 2 ) ~ 10 4 cm −3 . Based on our CO maps, we estimate the mass of EC2 at around 10 4 M ⊙ , and continuum observations suggest a dust-to-gas mass ratio as low as 0.001. Chemical models have been developed to reproduce the abundances in EC2 and they indicate that: heavy element abundances may be reduced by a factor of five relative to the solar neighbourhood (similar to dwarf irregular galaxies and damped Lyman alpha systems); very low extinction ( A V < 4 mag) due to a very low dust-to-gas ratio; an enhanced cosmic ray ionisation rate; and a higher UV field compared to local interstellar values. The reduced abundances may be attributed to the low level of star formation in this region and are probably also related to the continuing infall of low metallicity halo gas since the Milky Way formed. We find that shocks from an old supernova remnant may have determined the morphology and dynamics of EC2, including the recently discovered star clusters embedded in the northern and southern cores. However, compared to EC2, EC1 appears to be a chemically less varied environment. The apparent molecule-poor nature of EC1 demonstrates the characteristics of clouds that have not had the benefit of SN shocks to stimulate an active cloud chemistry and star formation." @default.
- W2126857100 created "2016-06-24" @default.
- W2126857100 creator A5003408098 @default.
- W2126857100 creator A5050502051 @default.
- W2126857100 creator A5076872160 @default.
- W2126857100 creator A5077156611 @default.
- W2126857100 creator A5088488102 @default.
- W2126857100 date "2008-02-01" @default.
- W2126857100 modified "2023-10-16" @default.
- W2126857100 title "Molecular line observations and chemical modelling of galactic edge clouds" @default.
- W2126857100 cites W2020909114 @default.
- W2126857100 cites W2033458410 @default.
- W2126857100 cites W2078494265 @default.
- W2126857100 cites W2088131932 @default.
- W2126857100 cites W2145782548 @default.
- W2126857100 cites W3016978576 @default.
- W2126857100 cites W3098360768 @default.
- W2126857100 cites W3101989524 @default.
- W2126857100 cites W4245815740 @default.
- W2126857100 doi "https://doi.org/10.1017/s1743921308021418" @default.
- W2126857100 hasPublicationYear "2008" @default.
- W2126857100 type Work @default.
- W2126857100 sameAs 2126857100 @default.
- W2126857100 citedByCount "0" @default.
- W2126857100 crossrefType "journal-article" @default.
- W2126857100 hasAuthorship W2126857100A5003408098 @default.
- W2126857100 hasAuthorship W2126857100A5050502051 @default.
- W2126857100 hasAuthorship W2126857100A5076872160 @default.
- W2126857100 hasAuthorship W2126857100A5077156611 @default.
- W2126857100 hasAuthorship W2126857100A5088488102 @default.
- W2126857100 hasBestOaLocation W21268571001 @default.
- W2126857100 hasConcept C101991246 @default.
- W2126857100 hasConcept C120665830 @default.
- W2126857100 hasConcept C121332964 @default.
- W2126857100 hasConcept C125857072 @default.
- W2126857100 hasConcept C127592171 @default.
- W2126857100 hasConcept C1276947 @default.
- W2126857100 hasConcept C150846664 @default.
- W2126857100 hasConcept C184665706 @default.
- W2126857100 hasConcept C196939603 @default.
- W2126857100 hasConcept C44870925 @default.
- W2126857100 hasConcept C555520305 @default.
- W2126857100 hasConcept C86021447 @default.
- W2126857100 hasConcept C98444146 @default.
- W2126857100 hasConcept C99465377 @default.
- W2126857100 hasConceptScore W2126857100C101991246 @default.
- W2126857100 hasConceptScore W2126857100C120665830 @default.
- W2126857100 hasConceptScore W2126857100C121332964 @default.
- W2126857100 hasConceptScore W2126857100C125857072 @default.
- W2126857100 hasConceptScore W2126857100C127592171 @default.
- W2126857100 hasConceptScore W2126857100C1276947 @default.
- W2126857100 hasConceptScore W2126857100C150846664 @default.
- W2126857100 hasConceptScore W2126857100C184665706 @default.
- W2126857100 hasConceptScore W2126857100C196939603 @default.
- W2126857100 hasConceptScore W2126857100C44870925 @default.
- W2126857100 hasConceptScore W2126857100C555520305 @default.
- W2126857100 hasConceptScore W2126857100C86021447 @default.
- W2126857100 hasConceptScore W2126857100C98444146 @default.
- W2126857100 hasConceptScore W2126857100C99465377 @default.
- W2126857100 hasLocation W21268571001 @default.
- W2126857100 hasOpenAccess W2126857100 @default.
- W2126857100 hasPrimaryLocation W21268571001 @default.
- W2126857100 hasRelatedWork W1972160620 @default.
- W2126857100 hasRelatedWork W2117510573 @default.
- W2126857100 hasRelatedWork W2133717847 @default.
- W2126857100 hasRelatedWork W2169186129 @default.
- W2126857100 hasRelatedWork W2574572616 @default.
- W2126857100 hasRelatedWork W2809604112 @default.
- W2126857100 hasRelatedWork W3100377056 @default.
- W2126857100 hasRelatedWork W4221018540 @default.
- W2126857100 hasRelatedWork W4221164820 @default.
- W2126857100 hasRelatedWork W4221164821 @default.
- W2126857100 isParatext "false" @default.
- W2126857100 isRetracted "false" @default.
- W2126857100 magId "2126857100" @default.
- W2126857100 workType "article" @default.