Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/27809
Title: | On the origin of phosphorus nitride in star-forming regions | Authors: | Mininni, C. FONTANI, FRANCESCO RIVILLA RODRIGUEZ, VICTOR MANUEL BELTRAN SOROLLA, MARIA TERESA Caselli, P. Vasyunin, A. |
Issue Date: | 2018 | Journal: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Number: | 476 | Issue: | 1 | First Page: | L39 | Abstract: | We present multitransition observations of phosphorus nitride (PN) towards a sample of nine massive dense cores in different evolutionary stages. Using transitions with different excitation conditions, we have found for the first time that the excitation temperatures of PN are in the range ∼5-30 K. To investigate the main chemical route for the PN formation (surface-chemistry versus gas-phase chemistry), and the dominant desorption mechanism (thermal versus shock), we have compared our results with those obtained from molecules tracing different chemical and physical conditions (SiO, SO, CH<SUB>3</SUB>OH, and N<SUB>2</SUB>H<SUP>+</SUP>). We have found that the PN line profiles are very well correlated with those of SiO and SO in six out of the nine targets, which indicate that PN may be released by sputtering of dust grains due to shocks. This finding is corroborated by a faint but statistically significant positive trend between the PN abundance and those of SiO and SO. However, in three objects the PN lines have no hints of high-velocity wings, which indicates an alternative origin of PN. Overall, our results indicate that the origin of PN is not unique, as it can be formed not only in protostellar shocks, but also in colder and more quiescent gas through alternative pathways. | URI: | http://hdl.handle.net/20.500.12386/27809 | URL: | https://academic.oup.com/mnrasl/article/476/1/L39/4893720 | ISSN: | 0035-8711 | DOI: | 10.1093/mnrasl/sly026 | Bibcode ADS: | 2018MNRAS.476L..39M | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
sly026.pdf | Pdf editoriale | 384.78 kB | Adobe PDF | View/Open |
1802.00623.pdf | postprint | 204.06 kB | Adobe PDF | View/Open |
Page view(s)
49
checked on Mar 28, 2024
Download(s)
24
checked on Mar 28, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.