RT info:eu-repo/semantics/article
T1 Rotational spectroscopic study and astronomical search for propiolamide in Sgr B2(N)
A1 Alonso, Elena R.
A1 Kolesniková, Lucie
A1 Belloche, Arnaud
A1 Mata, Santiago
A1 Garrod, Robin T.
A1 Jabri, Atef
A1 León, Iker
A1 Guillemin, Jean-Claude
A1 Müller, Holger S.P.
A1 Menten, Karl
A1 Alonso, José L.
K1 Rotational spectroscopy
K1 Molecular Interactions
K1 Gas Phase
K1 Interstellar medium
K1 23 Química
K1 2210 Química Física
K1 2206.07 Espectroscopia Molecular
AB For all the amides detected in the interstellar medium (ISM), the corresponding nitriles or isonitriles have also been detected in the ISM, some of which have relatively high abundances. Among the abundant nitriles for which the corresponding amide has not yet been detected is cyanoacetylene (HCCCN), whose amide counterpart is propiolamide (HCCC(O)NH   ). With the aim of supporting searches for this amide in the ISM, we provide a complete rotational study of propiolamide from 6 GHz to 440 GHz using rotational spectroscopic techniques in the frequency and time domain. We identified and measured more than 5500 distinct frequency lines of propiolamide and obtained accurate sets of spectroscopic parameters for the ground state and the three low-lying excited vibrational states. We used the ReMoCA spectral line survey performed with the Atacama Large Millimeter/submillimeter Array toward the star-forming region Sgr B2(N) to search for propiolamide. We report the nondetection of propiolamide toward the hot cores Sgr B2(N1S) and Sgr B2(N2). We find that propiolamide is at least 50 and 13 times less abundant than acetamide in Sgr B2(N1S) and Sgr B2(N2), respectively, indicating that the abundance difference between both amides is more pronounced by at least a factor of 8 and 2, respectively, than for their corresponding nitriles. Although propiolamide has yet to be included in astrochemical modeling networks, the observed upper limit to the ratio of propiolamide to acetamide seems consistent with the ratios of related species as determined from past simulations.
PB Astronomy and Astrophysics
SN 1432-0746
YR 2021
FD 2021
LK https://uvadoc.uva.es/handle/10324/81579
UL https://uvadoc.uva.es/handle/10324/81579
LA eng
NO A&A, 2021, 647, A55
NO Producción Científica
DS UVaDOC
RD 18-ene-2026