32 citations · 117 across the 13 of their papers we have counts for
13 papers
Deuteration of HC3N and CH3CCH in the pre-stellar core L1544
K. Giers, S. Spezzano, Y. Lin +2
Deuterated molecules are a useful diagnostic tool to probe the evolution and the kinematics in the earliest stages of star formation. Due to the low temperatures and high densities…
Chemical segregation analysed with unsupervised clustering
K. Giers, S. Spezzano, Y. Lin +3
Molecular emission is a powerful tool for studying the physical and chemical structures of dense cores. The distribution and abundance of different molecules provide information on…
PRODIGE - envelope to disk with NOEMA: V. Low 12C/13C ratios for CH3OH and CH3CN in hot corinos
L. A. Busch, J. E. Pineda, O. Sipilä +15
The 12C/13C isotope ratio has been derived towards numerous cold clouds (20-50 K) and a couple protoplanetary disks and exoplanet atmospheres. However, direct measurements of this…
Hunting pre-stellar cores with APEX: Corona Australis 151, the densest pre-stellar core or the youngest protostar?
E. Redaelli, S. Spezzano, P. Caselli +6
Context. Pre-stellar cores are the birthplaces of Sun-like stars and represent the initial conditions for the assembly of protoplanetary systems. Due to their short lifespans, they…
Hunting pre-stellar cores with APEX: IRAS16293E (Oph464)
S. Spezzano, E. Redaelli, P. Caselli +7
Pre-stellar cores are the first steps in the process of star and planet formation. However, the dynamical and chemical evolution of pre-stellar cores is still not well understood.…
Impact of ice growth on the physical and chemical properties of dense cloud cores
O. Sipilä, P. Caselli, M. Juvela
We investigated the effect of time-dependent ice growth on dust grains on the opacity and hence on the dust temperature in a collapsing molecular cloud core, with the aim of quanti…
Role of NH3 Binding Energy in the Early Evolution of Protostellar Cores
S. Kakkenpara Suresh, O. Sipila, P. Caselli +1
NH(ammonia) plays a critical role in the chemistry of star and planet formation, yet uncertainties in its binding energy (BE) values complicate accurate estimates of its abun…
Deuterium fractionation in cold dense cores in the low-mass star forming region L1688
I. V. Petrashkevich, A. F. Punanova, P. Caselli +5
In this work, we study deuterium fractionation in four starless cores in the low-mass star-forming region L1688 in the Ophiuchus molecular cloud. We study how the deuterium fractio…
Tracing the contraction of the pre-stellar core L1544 with HCO = 1-0 emission
J. Ferrer Asensio, S. Spezzano, P. Caselli +6
Spectral line profiles of several molecules observed towards the pre-stellar core L1544 appear double-peaked. For abundant molecular species this line morphology has been linked to…
H2CS deuteration maps towards the pre-stellar core L1544
S. Spezzano, O. Sipilä, P. Caselli +7
Deuteration is a crucial tool to understand the complexity of interstellar chemical processes, especially when they involve the interplay of gas-phase and grain-surface chemistry.…
First survey of HCNH in high-mass star-forming cloud cores
F. Fontani, L. Colzi, E. Redaelli +2
Most stars in the Galaxy, including the Sun, were born in high-mass star-forming regions. It is hence important to study the chemical processes in these regions to better understan…
Understanding the cyclic-to-linear ratio in L1544
O. Sipilä, S. Spezzano, P. Caselli
Aims. We aim to understand the high cyclic-to-linear ratio () observed toward L1544 by Spezzano et al. (2016). Methods. We combine a gas-grain chemical model…
The effect of multilayer ice chemistry on gas-phase deuteration in starless cores
O. Sipilä, P. Caselli, V. Taquet
Aims. We aim to investigate whether a multilayer ice model can be as successful as a bulk ice model in reproducing the observed abundances of various deuterated gas-phase species t…