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A 3mm chemical exploration of small organics in Class I YSOs by Gal, Romane Le; Öberg, Karin I.; Huang, Jane; Law, Charles J.; Ménard, François; Lefloch, Bertrand; Vastel, Charlotte; Lopez-Sepulcre, Ana; Favre, Cécile; Bianchi, Eleonora; Ceccarelli, Cecilia is a scholarly article available to read on EtoBox.

What is A 3mm chemical exploration of small organics in Class I YSOs about?

There is mounting evidence that the composition and structure of planetary systems are intimately linked to their birth environments. During the past decade, several spectral surveys probed the chemistry of the earliest stages of star formation and of late planet-forming disks. However, very little is known about the chemistry of intermediate protostellar stages, i.e. Class I Young Stellar Objects (YSOs), where planet formation may have already begun. We present here the first results of a 3mm spectral survey performed with the IRAM-30m telescope to investigate the chemistry of a sample of seven Class I YSOs located in the Taurus star-forming region. These sources were selected to embrace the wide diversity identified for low-mass protostellar envelope and disk systems. We present detections and upper limits of thirteen small ($N_{\rm atoms}\leq3$) C, N, O, and S carriers - namely CO, HCO$^+$, HCN, HNC, CN, N$_2$H$^+$, C$_2$H, CS, SO, HCS$^+$, C$_2$S, SO$_2$, OCS - and some of their D, $^{13}$C, $^{15}$N, $^{18}$O, $^{17}$O, and $^{34}$S isotopologues. Together, these species provide constraints on gas-phase C/N/O ratios, D- and $^{15}$N-fractionation, source temperature and UV exp

Author

Gal, Romane Le; Öberg, Karin I.; Huang, Jane; Law, Charles J.; Ménard, François; Lefloch, Bertrand; Vastel, Charlotte; Lopez-Sepulcre, Ana; Favre, Cécile; Bianchi, Eleonora; Ceccarelli, Cecilia

Published

2020

Language

EN