OS
O. Sipilä
astro-ph.GAastro-ph.SRastro-ph.EPphysics.chem-phastrochemistrycomplex organic moleculedeuteration mapsH-abstraction processesisotopic fractionationL1544
On Valency
published · living versionsW_4cq98m4a·v1 · currentpublished
Chemistry of TMC-1 with multiply deuterated species and spin chemistry of H2, H2+, H3+ and their isotopologues
with L. Majumdar, P. Gratier, M. Ruaud, V. Wakelam +4
1 version
Preprints & journals
90 papers in the corpus · 2009–2026Isomer-resolved ion-molecule reaction kinetics of HCO+ and HOC+2610.23452v1 · Miguel Jim'enez-Redondo, Olli Sipila, Petr Dohnal et al.2026 · 0 citationsarXiv
A Cyanopolyyne-rich but COM-poor Massive Protostar: The First Hot Carbon Chain Chemistry Source G28.28-0.362609.30654v1 · Kotomi Taniguchi, Masao Saito, Prasanta Gorai et al.2026 · 0 citationsarXiv
Corona Australis 151: an extremely young protostar2609.05026v1 · E. Redaelli, S. Spezzano, P. Caselli et al.2026 · 0 citationsarXiv
MIAO-ALMA: Shocks and Protostellar Outflows in 70 m-dark clumps with 1 /2608.21978v1 · Shuting Lin, Siyi Feng, Junzhi Wang et al.2026 · 0 citationsarXiv
High C/C isotopic ratios toward G+0.693-0.027: evidence for gas inflow to the Central Molecular Zone2607.06541v2 · L. Colzi, O. Sipila, I. Jim'enez-Serra et al.2026 · 1 citationarXiv
Low cosmic-ray ionisation at parsec scales in G035.39-00.332606.28765v1 · Andrea Socci, Ashley Barnes, Jaime Pineda et al.2026 · 0 citationsarXiv
Oxygen in the protostellar clump OMC-2 FIR42606.16833v1 · Jorma Harju, Paola Caselli, Rolf Gusten et al.2026 · 0 citationsarXiv
Tracing the sulfur depletion in starless and pre-stellar cores2605.13635v1 · L. Scholler, S. Spezzano, O. Sipila et al.2026 · 0 citationsarXiv
Modeling the UV-photon irradiation of CS-bearing ices in the laboratory with the pyRate gas-grain astrochemical code. New insights into the missing sulfur problem2605.03725v1 · O. Sipila, R. Mart'in-Dom'enech, W. Riedel et al.2026 · 0 citationsA&A 710, A228 (2026)
A 3D physico-chemical model of a pre-stellar core. II. Dynamic chemical evolution in a pre-stellar core model using tracer particles2603.17696v1 · S. S. Jensen, S. Spezzano, P. Caselli et al.2026 · 0 citationsarXiv
Using astrochemical models to simulate reactivity experiments on cold surfaces2602.11347v1 · Valeriia Sokolova, Basile Husquinet, Stephan Diana et al.2026 · 0 citationsarXiv
Deuteration of HC3N and CH3CCH in the pre-stellar core L15442601.15791v1 · K. Giers, S. Spezzano, Y. Lin et al.2026 · 0 citationsarXiv
New Estimate for the Cosmic Ray-Induced Photodissociation Rate in the Interstellar Medium2601.09387v1 · O. Sipila, P. Caselli, M. Padovani et al.2026 · 0 citationsarXiv
High Deuteration of Methanol in L1544.41561070 · Spezzano, Silvia, Riedel, Wiebke, Caselli, Paola et al.2026 · 3 citationsACS earth & space chemistry. 2026;10(1):57-65
First mapping of prebiotic molecule CH2NH in a pre-stellar core2512.12396v1 · Yuxin Lin, Silvia Spezzano, Olli Sipila et al.2025 · 1 citationarXiv
Deuterium fractionation and CO depletion in Barnard 52512.10143v3 · Igor Petrashkevich, Anna Punanova, Paola Caselli et al.2025 · 0 citationsApJ 997 296 (2026)
Neon is an inhibitor of CO hydrogenation in pre-stellar core conditions2510.26445v1 · Basile Husquinet, Julie Vitorino, Olli Sipila et al.2025 · 1 citationarXiv
New Orbital Constraints for YSES 1 b and HR 2562 B from High-Precision Astrometry and Planetary Radial Velocities2509.14321v1 · Jonathan Roberts, William Thompson, Jason J. Wang et al.2025 · 3 citationsarXiv
Hunting pre-stellar cores with APEX: overview2509.00864v1 · P. Caselli, S. Spezzano, E. Redaelli et al.2025 · 2 citationsA&A 703, A77 (2025)
High sensitivity molecular line observations towards the L1544 pre-stellar core challenge current models2508.20355v1 · J. Ferrer Asensio, S. S. Jensen, S. Spezzano et al.2025 · 0 citationsarXiv
Chemical segregation analysed with unsupervised clustering2507.22482v1 · K. Giers, S. Spezzano, Y. Lin et al.2025 · 5 citationsA&A 699, A103 (2025)
Statistical nuclear spin ratios of deuterated ammonia in the pre-stellar core L15442507.04825v2 · Jorma Harju, Paola Caselli, Olli Sipilae et al.2025 · 4 citationsarXiv
The Effect of Weak Cosmic Ray Heating Events on the Desorption of 2507.01612v1 · O. Sipila, K. Silsbee, N. Carbajal et al.2025 · 0 citationsarXiv
PRODIGE - envelope to disk with NOEMA: V. Low 12C/13C ratios for CH3OH and CH3CN in hot corinos2505.21307v1 · L. A. Busch, J. E. Pineda, O. Sipila et al.2025 · 8 citationsA&A 699, A359 (2025)
Hunting pre-stellar cores with APEX: Corona Australis 151, the densest pre-stellar core or the youngest protostar?2502.13745v1 · E. Redaelli, S. Spezzano, P. Caselli et al.2025 · 6 citationsA&A 696, A171 (2025)
Cl+ and HCl+ in Reaction with H2 and Isotopologues: A Glance into H Abstraction and Indirect Exchange at Astrophysical Conditions2502.10022v1 · Miguel Jim'enez-Redondo, Olli Sipila, Robin Dahl et al.2025 · 2 citationsarXiv
Hunting pre-stellar cores with APEX: IRAS16293E (Oph464)2412.13760v1 · S. Spezzano, E. Redaelli, P. Caselli et al.2024 · 10 citationsA&A 694, A27 (2025)
Measurements and simulations of rate coefficients for the deuterated forms of the H2 + + H2 and H3 + + H2 reactive systems at low temperature2412.02206v1 · Miguel Jim'enez-Redondo, Olli Sipila, Pavol Jusko et al.2024 · 6 citationsarXiv
Probing the Physics of Star-Formation (ProPStar) III. No evidence for dissipation of turbulence down to 20 mpc (4 000 au) scale2409.00392v1 · Jaime E. Pineda, Juan D. Soler, Stella Offner et al.2024 · 5 citationsA&A 690, L5 (2024)
Impact of ice growth on the physical and chemical properties of dense cloud cores2408.17202v1 · O. Sipila, P. Caselli, M. Juvela2024 · 2 citationsA&A 690, A280 (2024)
Role of NH3 Binding Energy in the Early Evolution of Protostellar Cores2407.17891v1 · S. Kakkenpara Suresh, O. Sipila, P. Caselli et al.2024 · 1 citationA&A 696, A71 (2025)
A low cosmic-ray ionisation rate in the prestellar core Ophiuchus/H-MM1. Mapping of the molecular ions ortho-H2D+, N2H+, and DCO+2405.20004v1 · Jorma Harju, Charlotte Vastel, Olli Sipilae et al.2024 · 3 citationsA&A 688, A117 (2024)
Fractionation in young cores: Direct determinations of nitrogen and carbon fractionation in HCN2403.04408v1 · S. S. Jensen, S. Spezzano, P. Caselli et al.2024 · 8 citationsarXiv
Probing the physics of star formation (ProPStar): I. First resolved maps of the electron fraction and cosmic-ray ionization rate in NGC 13332402.16202v1 · Jaime E. Pineda, Olli Sipila, Dominique M. Segura-Cox et al.2024 · 33 citationsA&A 686, A162 (2024)
Massive clumps in W43-main: Structure formation in an extensively shocked molecular cloud2401.17192v1 · Yuxin Lin, Friedrich Wyrowski, Hauyu Baobab Liu et al.2024 · 3 citationsarXiv
Deuterium fractionation in cold dense cores in the low-mass star forming region L16882401.04415v2 · I. V. Petrashkevich, A. F. Punanova, P. Caselli et al.2024 · 3 citationsarXiv
Nuclear spin ratios of deuterated ammonia in prestellar cores. LAsMA observations of H-MM1 and Oph D2311.08006v1 · Jorma Harju, Jaime E. Pineda, Olli Sipila et al.2023 · 0 citationsarXiv
Modelling Deuterated Isotopologues of Methanol toward the Pre-Stellar Core L15442310.08389v1 · W. Riedel, O.Sipila, E. Redaelli et al.2023 · 25 citationsA&A 680, A87 (2023)
Combined model for , , and spin-state chemistry in molecular clouds2309.02066v2 · O. Sipila, L. Colzi, E. Roueff et al.2023 · 16 citationsA&A 678, A120 (2023)
Similar levels of deuteration in the pre-stellar core L1544 and the protostellar core HH2112306.12775v1 · K. Giers, S. Spezzano, P. Caselli et al.2023 · 15 citationsA&A 676, A78 (2023)
First detection of deuterated methylidyne (CD) in the interstellar medium2305.07143v1 · Arshia M. Jacob, Karl M. Menten, Friedrich Wyrowski et al.2023 · 2 citationsA&A 675, A69 (2023)
A large (~1 pc) contracting envelope around the prestellar core L15442210.13571v1 · E. Redaelli, A. Chac'on-Tanarro, P. Caselli et al.2022 · 17 citationsarXiv
Chemistry and dynamics of the prestellar core L15442209.14025v2 · O. Sipila, P. Caselli, E. Redaelli et al.2022 · 15 citationsA&A 668, A131 (2022)
Tracing the contraction of the pre-stellar core L1544 with HCO = 1-0 emission2209.02489v1 · J. Ferrer Asensio, S. Spezzano, P. Caselli et al.2022 · 7 citationsarXiv
A Survey of Deuterated Ammonia in the Cepheus Star-Forming Region L12512207.10718v1 · Maria Galloway-Sprietsma, Yancy L. Shirley, James Di Francesco et al.2022 · 6 citationsarXiv
Nitrogen fractionation towards a pre-stellar core traces isotope-selective photodissociation2207.06121v1 · Silvia Spezzano, Paola Caselli, Olli Sipila et al.2022 · 14 citationsA&A 664, L2 (2022)
Deuteration of c-CH towards the pre-stellar core L15442205.14963v1 · K. Giers, S. Spezzano, F. Alves et al.2022 · 16 citationsA&A 664, A119 (2022)
Multi-line observations of CHOH, c-CH and HNCO towards L1544: Dissecting the core structure with chemical differentiation2205.09806v1 · Yuxin Lin, Silvia Spezzano, Olli Sipila et al.2022 · 22 citationsA&A 665, A131 (2022)
An Interferometric View of H-MM1. I. Direct Observation of NH3 Depletion2205.01201v1 · Jaime E. Pineda, Jorma Harju, Paola Caselli et al.2022 · 34 citationsarXiv
H2CS deuteration maps towards the pre-stellar core L15442203.08234v1 · S. Spezzano, O. Sipila, P. Caselli et al.2022 · 25 citationsA&A 661, A111 (2022)
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