Publications

JWST Observations of Young protoStars (JOYS): Overview of program and early results

E. F. van Dishoeck , Ł. Tychoniec , W. R. M. Rocha , K. Slavicinska, L. Francis , M. L. van Gelder ,T. P. Ray , H. Beuther, A. Caratti o Garatti, N. G. C. Brunken, Y. Chen, R. Devaraj, V. C. Geers, C. Gieser , T. P. Greene, K. Justtanont , V. J. M. Le Gouellec, P. J. Kavanagh, P. D. Klaassen, A. G. M. Janssen , M. G. Navarro, P. Nazari, S. Notsu, G. Perotti, M. E. Ressler, S. D. Reyes, A. D. Sellek, B. Tabone, C. Tap, N. C. M. A. Theijssen, L. Colina, M. Güdel, Th. Henning, P.-O. Lagage, G. Östlin, B. Vandenbussche, and G. S. Wright

A&A: 2025A&A…699A.361V – Astro-ph: 2505.08002

HDO Ice Detected toward an Isolated Low-mass Protostar with JWST

Katerina Slavicinska, Łukasz Tychonie, María Gabriela Navarro, Ewine F. van Dishoeck, John J. Tobin, Martijn L. van Gelder, Yuan Chen, A. C. Adwin Boogert, W. Blake Drechsler, Henrik Beuther, Alessio Caratti o Garatti, S. Thomas Megeath, Pamela Klaassen, Leslie W. Looney, Patrick J. Kavanagh, Nashanty G. C. Brunken, Patrick Sheehan, and William J. Fischer

A&A: 2025ApJ…986L..19S – Astro-ph: 2505.14686

JWST observations of segregated ¹²CO₂ and ¹³CO₂ ices in protostellar envelopes

N. G. C. Brunken, A. C. A. Boogert, E. F. van Dishoeck, N. J. Evans, C. A. Poteet, K. Slavicinska, L. Tychoniec, P. Nazari, L. W. Looney, H. Tyagi, M. Narang, P. Klaassen, Y. Yang, P. J. Kavanagh, S. T. Megeath, and M. E. Ressler

A&A: 2025arXiv250514769B – Astro-ph: 2505.14769

Mid-infrared extinction curve for protostellar envelopes from JWST-detected embedded jet emission: the case of TMC1A

K. D. Assani, Z.-Y. Li, J. P. Ramsey, Ł. Tychoniec, L. Francis, V. J. M. Le Gouellec, A. Caratti o Garatti, T. Giannini, M. McClure, P. Bjerkeli, H. Calcutt, H. Beuther, R. Devaraj, X. Liu, A. Plunkett, M. G. Navarro, E. F. van Dishoeck, and D. Harsono

A&A: 2025arXiv250402136A – Astro-ph: 2504.02136

JOYS: The [D/H] abundance derived from protostellar outflows across the Galactic disk measured with JWST

L. Francis1 , E. F. van Dishoeck , A. Caratti o Garatti , M. L. van Gelder , C. Gieser , H. Beuther , T. P. Ray , L. Tychoniec , P. Nazari, S. Reyes , P. J. Kavanagh, P. Klaassen, M. Güdel, and T. Henning

A&A: 2025A&A…694A.174F – Astro-ph: 2501.02085

Ammonium hydrosulfide (NH₄SH) as a potentially significant sulfur sink in interstellar ices

K. Slavicinska , A. C. A. Boogert, Ł. Tychoniec , E. F. van Dishoeck , M. L. van Gelder , M. G. Navarro , J. C. Santos , P. D. Klaassen , P. J. Kavanagh , and K.-J. Chuang

A&A: 2025A&A…693A.146S – Astro-ph: 2410.02860

JWST Observations of Young protoStars (JOYS): Overview of gaseous molecular emission and absorption in low-mass protostars

M. L. van Gelder , L. Francis , E. F. van Dishoeck, Ł. Tychoniec , T. P. Ray , H. Beuther , A. Caratti o Garatti , Y. Chen , R. Devaraj, C. Gieser , K. Justtanont , P. J. Kavanagh, P. Nazari, S. Reyes4 , W. R. M. Rocha , K. Slavicinska, M. Güdel, Th. Henning, P.-O. Lagage, and G. Wright

A&A: 2024A&A…692A.197V – Astro-ph: 2410.01636

JOYS+ study of solid-state ¹²C/¹³C isotope ratios in protostellar envelopes: Observations of CO and CO₂ ice with the James Webb Space Telescope

N. G. C. Brunken1 , E. F. van Dishoeck , K. Slavicinska, V. J. M. le Gouellec , W. R. M. Rocha , L. Francis , L. Tychoniec , M. L. van Gelder , M. G. Navarro, A. C. A. Boogert, P. J. Kavanagh, P. Nazari , T. Greene, M. E. Ressler, and L. Majumdar

A&A: 2024A&A…691A.134C – Astro-ph: 2409.17237

JWST Observations of Young protoStars (JOYS): HH211: Textbook case of a protostellar jet and outflow

A. Caratti o Garatti , T. P. Ray , P. J. Kavanagh, M. J. McCaughrean , C. Gieser , T. Giannini,
E. F. van Dishoeck , K. Justtanont , M. L. van Gelder , L. Francis, H. Beuther , Ł. Tychoniec, B. Nisini, M. G. Navarro, R. Devaraj , S. Reyes , P. Nazari , P. Klaassen, M. Güdel, Th. Henning, P. O. Lagage, G. Östlin, B. Vandenbussche, C. Waelkens, and G. Wright

A&A: 2024A&A…691A.134C – Astro-ph: 2409.16061

JOYS+: link between ice and gas of complex organic molecules. Comparing JWST and ALMA data of two low-mass protostars

Y. Chen, W. R. M. Rocha, E. F. van Dishoeck, M. L. van Gelder, P. Nazari, K. Slavicinska, L. Francis, B. Tabone, M. E. Ressler, P. D. Klaassen, H. Beuther, A. C. A. Boogert, C. Gieser, P. J. Kavanagh, G. Perotti, V. J. M. Le Gouellec, L. Majumdar, M. Güdel, Th. Henning

A&A: 2024A&A…690A.205C– Astro-ph: 2407.20066

JWST Observations of Young protoStars (JOYS): Linked accretion and ejection in a Class I protobinary system

Łukasz Tychoniec, Martijn L. van Gelder, Ewine F. van Dishoeck, Logan Francis, Will R. M. Rocha, Alessio Caratti o Garatti, Henrik Beuther, Caroline Gieser, Kay Justtanont, Harold Linnartz, Valentin J. M. Le Gouellec, Giulia Perotti, Dev Rangaswamy, Benoît Tabone, Thomas P. Ray, Nashanty G. C. Brunken, Yuan Chen, Patrick J. Kavanagh, Pamela Klaassen, Katerina Slavicinska, Manuel Güdel, Goran Östlin

A&A: 2024A&A…687A..36T Astro-ph: 2402.04343

JOYS: MIRI/MRS spectroscopy of gas-phase molecules from the high-mass star-forming region IRAS 23385+6053

L. Francis, M. L. van Gelder, E. F. van Dishoeck, C. Gieser, H. Beuther, L. Tychoniec, G. Perotti, A. Caratti o Garatti, P. J. Kavanagh, T. Ray, P. Klaassen, K. Justtanont, H. Linnartz, W. R. M. Rocha, K. Slavicinska, M. Güdel, T. Henning, P. O. Lagage, G. Östlin

A&A: 2024A&A…683A.249F Astro-ph: 2401.06880

JWST Observations of Young protoStars (JOYS+): Detection of icy complex organic molecules and ions. I. CH4, SO2, HCOO−, OCN−, H2CO, HCOOH, CH3CH2OH, CH3CHO, CH3OCHO, CH3COOH

W. R. M. Rocha, E. F. van Dishoeck, M. E. Ressler, M. L. van Gelder, K. Slavicinska, N. G. C. Brunken, H. Linnartz, T. P. Ray, H. Beuther, A. Caratti o Garatti, V. Geers, P. J. Kavanagh, P. D. Klaassen, K. Justannont, Y. Chen, L. Francis, C. Gieser, G. Perotti, Ł. Tychoniec, M. Barsony, L. Majumdar, V. J. M. le Gouellec, L. E. U. Chu, B. W. P. Lew, Th. Henning, G. Wright

A&A: 2024A&A…683A.124R Astro-ph: 2312.06834

JOYS+: mid-infrared detection of gas-phase SO2 emission in a low-mass protostar. The case of NGC 1333 IRAS2A: hot core or accretion shock?

M. L. van Gelder, M. E. Ressler, E. F. van Dishoeck, P. Nazari, B. Tabone, J. H. Black, Ł. Tychoniec, L. Francis, M. Barsony, H. Beuther, A. Caratti o Garatti, Y. Chen, C. Gieser, V. J. M. le Gouellec, P. J. Kavanagh, P. D. Klaassen, B. W. P. Lew, H. Linnartz, L. Majumdar, G. Perotti, and W. R. M. Rocha

A&A: 2024A&A…682A..78V Astro-ph: 2311.17161

JOYS: Disentangling the warm and cold material in the high-mass IRAS 23385+6053 cluster

C. Gieser, H. Beuther, E. F. van Dishoeck, L. Francis, M. L. van Gelder, L. Tychoniec, P. J. Kavanagh, G. Perotti, A. Caratti o Garatti, T.P. Ray, P. Klaassen, K. Justtanont, H. Linnartz, W. R. M. Rocha, K. Slavicinska, L. Colina, M. Güdel, Th. Henning, P.-O. Lagage, G. Östlin, B. Vandenbussche, C. Waelkens, and G. Wright

A&A: 2023A&A…679A.108G Astro-ph: 2309.10410

Outflows from the youngest stars are mostly molecular

T. P. Ray, M. J. McCaughrean, A. Caratti o Garatti, P. J. Kavanagh, K. Justtanont, E. F. van Dishoeck, M. Reitsma, H. Beuther, L. Francis, C. Gieser, P. Klaassen, G. Perotti, L. Tychoniec, M. van Gelder, L. Colina, Th. R. Greve, M. Güdel, Th. Henning, P. O. Lagage, G. Östlin, B. Vandenbussche, C. Waelkens, G. Wright

Nature: 622, pages 48–52 Astro-ph: –

JOYS: JWST Observations of Young protoStars Outflows and accretion in the high-mass star-forming region IRAS 23385+6053

H. Beuther, E. F. van Dishoeck, Ł. Tychoniec, C. Gieser, P.J. Kavanagh, G. Perotti, M. L. van Gelder, P. Klaassen, A. Caratti o Garatti, L. Francis, W. R. M. Rocha, K. Slavicinska, T. Ray, K. Justtanont, H. Linnartz, C. Waelkens, L. Colina, T. Greve, M. Güdel, T. Henning, P.-O. Lagage, B. Vandenbussche, G. Östlin, and G. Wright

A&A: 2023A&A…673A.121B Astro-ph: 2303.13172

The diverse chemistry of protoplanetary disks as revealed by JWST

Ewine F. van Dishoeck, S. Grant, B. Tabone, M. van Gelder, L. Francis, L. Tychoniec, G. Bettoni, A.M. Arabhavi, D. Gasman , P. Nazari, M. Vlasblom, P. Kavanagh, V. Christiaens, P. Klaassen, H. Beuther, Th. Henning, and I. Kamp

Faraday Discussions, 2023 Advance Article Astro-ph: 2307.11817