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• W3099341358 endingPage "A74" @default.
• W3099341358 startingPage "A74" @default.
• W3099341358 abstract "Pre-stellar cores within molecular clouds provide the very initial conditions in which stars are formed. FeSt 1-457 is a prototypical starless core and the most chemically evolved among those isolated, embedded in the most pristine part of the Pipe nebula, the bowl. We use the IRAM 30 m telescope and the PdBI to study the chemical and physical properties of the starless core FeSt 1-457 (Core 109) in the Pipe nebula. We fit the hyperfine structure of the N2H+ (1−0) IRAM 30 m data. This allowed us to measure with high precision the velocity field, line widths and opacity and derive the excitation temperature and column density in the core. We used a modified Bonnor-Ebert sphere model adding a temperature gradient towards the center to fit the 1.2 mm continuum emission and visual extinction maps. Using this model, we have estimated the abundances of the N2H+ and the rest of molecular lines detected in the 30 GHz wide line survey performed at 3 mm with IRAM 30 m using ARTIST software. The core presents a rich chemistry with emission from early (C3H2, HCN, CS) and late-time molecules (e.g., N2H+), with a clear chemical spatial differentiation for nitrogen (centrally peaked), oxygen (peaking to the southwest) and sulfurated molecules (peaking to the east). For most of the molecules detected (HCN, HCO+, CH3OH, CS, SO, 13CO and C18O), abundances are best fit with three values, presenting a clear decrease of abundance of at least one or two orders of magnitude towards the center of the core. The Bonnor-Ebert analysis indicates the core is gravitationally unstable and the magnetic field is not strong enough to avoid the collapse. Depletion of molecules onto the dust grains occurs at the interior of the core, where dust grain growth and dust depolarization also occurs. This suggests that these properties may be related. On the other hand, some molecules exhibit asymmetries in their integrated emission maps, which appear to be correlated with a previously reported submillimetre polarization asymmetry. These asymmetries could be due to a stronger interstellar radiation field in the western side of the core." @default.
• W3099341358 created "2020-11-23" @default.
• W3099341358 creator A5042831166 @default.
• W3099341358 creator A5046561929 @default.
• W3099341358 creator A5056130542 @default.
• W3099341358 creator A5058154645 @default.
• W3099341358 creator A5064431407 @default.
• W3099341358 creator A5068020296 @default.
• W3099341358 creator A5068450420 @default.
• W3099341358 creator A5080015145 @default.
• W3099341358 creator A5089710588 @default.
• W3099341358 date "2017-01-01" @default.
• W3099341358 modified "2023-10-18" @default.
• W3099341358 title "A correlation between chemistry, polarization, and dust properties in the Pipe nebula starless core FeSt 1-457" @default.
• W3099341358 cites W1624414613 @default.
• W3099341358 cites W1929501738 @default.
• W3099341358 cites W1962436338 @default.
• W3099341358 cites W1967216064 @default.
• W3099341358 cites W1972260194 @default.
• W3099341358 cites W1981804701 @default.
• W3099341358 cites W1982453941 @default.
• W3099341358 cites W1985471486 @default.
• W3099341358 cites W1990863564 @default.
• W3099341358 cites W1992651699 @default.
• W3099341358 cites W1996482170 @default.
• W3099341358 cites W2002500579 @default.
• W3099341358 cites W2015368600 @default.
• W3099341358 cites W2017118692 @default.
• W3099341358 cites W2024173203 @default.
• W3099341358 cites W2024389974 @default.
• W3099341358 cites W2029895468 @default.
• W3099341358 cites W2031007840 @default.
• W3099341358 cites W2035344225 @default.
• W3099341358 cites W2035498751 @default.
• W3099341358 cites W2041150555 @default.
• W3099341358 cites W2043926793 @default.
• W3099341358 cites W2051075240 @default.
• W3099341358 cites W2053103156 @default.
• W3099341358 cites W2061129269 @default.
• W3099341358 cites W2062035041 @default.
• W3099341358 cites W2064554270 @default.
• W3099341358 cites W2066559860 @default.
• W3099341358 cites W2068425859 @default.
• W3099341358 cites W2068557158 @default.
• W3099341358 cites W2068709634 @default.
• W3099341358 cites W2071695167 @default.
• W3099341358 cites W2085012582 @default.
• W3099341358 cites W2085173748 @default.
• W3099341358 cites W2091950275 @default.
• W3099341358 cites W2095429919 @default.
• W3099341358 cites W2101256692 @default.
• W3099341358 cites W2104382780 @default.
• W3099341358 cites W2105217969 @default.
• W3099341358 cites W2105870797 @default.
• W3099341358 cites W2107637265 @default.
• W3099341358 cites W2114351830 @default.
• W3099341358 cites W2116486000 @default.
• W3099341358 cites W2119741305 @default.
• W3099341358 cites W2129241050 @default.
• W3099341358 cites W2131287406 @default.
• W3099341358 cites W2133856662 @default.
• W3099341358 cites W2143146468 @default.
• W3099341358 cites W2143371835 @default.
• W3099341358 cites W2152598873 @default.
• W3099341358 cites W2162899347 @default.
• W3099341358 cites W2166023823 @default.
• W3099341358 cites W2166054053 @default.
• W3099341358 cites W2166956220 @default.
• W3099341358 cites W2170254899 @default.
• W3099341358 cites W2171003055 @default.
• W3099341358 cites W2599989098 @default.
• W3099341358 cites W3098301813 @default.
• W3099341358 cites W3098384195 @default.
• W3099341358 cites W3099270228 @default.
• W3099341358 cites W3099342830 @default.
• W3099341358 cites W3099466317 @default.
• W3099341358 cites W3099758489 @default.
• W3099341358 cites W3100213073 @default.
• W3099341358 cites W3100970929 @default.
• W3099341358 cites W3101211208 @default.
• W3099341358 cites W3101242607 @default.
• W3099341358 cites W3102204688 @default.
• W3099341358 cites W3102531409 @default.
• W3099341358 cites W3102692608 @default.
• W3099341358 cites W3102734874 @default.
• W3099341358 cites W3102959557 @default.
• W3099341358 cites W3103418802 @default.
• W3099341358 cites W3103566942 @default.
• W3099341358 cites W3104532707 @default.
• W3099341358 cites W3104660840 @default.
• W3099341358 cites W3104890437 @default.
• W3099341358 cites W3104963219 @default.
• W3099341358 cites W3105099196 @default.
• W3099341358 cites W3105101348 @default.
• W3099341358 cites W3105369793 @default.
• W3099341358 cites W3106485099 @default.
• W3099341358 cites W3122389712 @default.
• W3099341358 cites W3124576228 @default.

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