Refereed Journal Articles

1. Tychoniec, Ł., Francis, L., Navarro, M. G., Vorster, J. M., van Dishoeck, E. F., Garatti, A. C. o, Assani, K., Le Gouellec, V. J. M., Tabone Benoı̂t, Klaassen, P., Janssen, A. G. M., Justtanont, K., Harsono, D., Nazari, P., Reyes, S., Slavicinska, K., Gieser, C., Bourke, T., Yang, Y.-L., … van Gelder, M. L. (2026). JOYS: Launching and destruction of dust in protostellar jets. The case of BHR71-IRS1 with JWST/MIRI. ArXiv e-Prints, arXiv:2604.11904.

   DOI BIB

   @article{Tychoniec.Francis.ea2026,
     author = {{Tychoniec}, {\L}ukasz and {Francis}, Logan and {Navarro}, Maria Gabriela and {Vorster}, Jakobus M. and {van Dishoeck}, Ewine F. and {Garatti}, Alessio Caratti o and {Assani}, Korash and {Le Gouellec}, Valentin J.~M. and {Tabone}, Beno{\^\i}t and {Klaassen}, Pamela and {Janssen}, Adriaan G.~M. and {Justtanont}, Kay and {Harsono}, Daniel and {Nazari}, Pooneh and {Reyes}, Simon and {Slavicinska}, Katerina and {Gieser}, Caroline and {Bourke}, Tyler and {Yang}, Yao-Lun and {Nisini}, Brunella and {Giannini}, Teresa and {Beuther}, Henrik and {Devaraj}, R. and {Ray}, Thomas P. and {Brunken}, Nashanty G.~C. and {Chen}, Yuan and {van Gelder}, Martijn L.},
     journal = {arXiv e-prints},
     title = {{JOYS: Launching and destruction of dust in protostellar jets. The case of BHR71-IRS1 with JWST/MIRI}},
     year = {2026},
     month = apr,
     pages = {arXiv:2604.11904},
     adsnote = {Provided by the SAO/NASA Astrophysics Data System},
     adsurl = {https://ui.adsabs.harvard.edu/abs/2026arXiv260411904T},
     archiveprefix = {arXiv},
     doi = {10.48550/arXiv.2604.11904},
     eid = {arXiv:2604.11904},
     eprint = {2604.11904},
     keywords = {Solar and Stellar Astrophysics, Earth and Planetary Astrophysics, Astrophysics of Galaxies},
     primaryclass = {astro-ph.SR}
   }
   

2. Tychoniec, Ł., van Gelder, M. L., van Dishoeck, E. F., Francis, L., Rocha, W. R. M., Caratti o Garatti, A., Beuther, H., Gieser, C., Justtanont, K., Linnartz, H., Le Gouellec, V. J. M., Perotti, G., Devaraj, R., Tabone Benoı̂t, Ray, T. P., Brunken, N. G. C., Chen, Y., Kavanagh, P. J., Klaassen, P., … Östlin, G. (2024). JWST Observations of Young protoStars (JOYS). Linked accretion and ejection in a Class I protobinary system. Astronomy & Astrophysics, 687, A36.

   DOI BIB

   @article{Tychoniec.vanGelder.ea2024,
     author = {{Tychoniec}, {\L}ukasz and {van Gelder}, Martijn L. and {van Dishoeck}, Ewine F. and {Francis}, Logan and {Rocha}, Will R.~M. and {Caratti o Garatti}, Alessio and {Beuther}, Henrik and {Gieser}, Caroline and {Justtanont}, Kay and {Linnartz}, Harold and {Le Gouellec}, Valentin J.~M. and {Perotti}, Giulia and {Devaraj}, Rangaswamy and {Tabone}, Beno{\^\i}t and {Ray}, Thomas P. and {Brunken}, Nashanty G.~C. and {Chen}, Yuan and {Kavanagh}, Patrick J. and {Klaassen}, Pamela and {Slavicinska}, Katerina and {G{\"u}del}, Manuel and {{\"O}stlin}, Goran},
     journal = {Astronomy & Astrophysics},
     title = {{JWST Observations of Young protoStars (JOYS). Linked accretion and ejection in a Class I protobinary system}},
     year = {2024},
     month = jul,
     pages = {A36},
     volume = {687},
     adsnote = {Provided by the SAO/NASA Astrophysics Data System},
     adsurl = {https://ui.adsabs.harvard.edu/abs/2024A&A...687A..36T},
     archiveprefix = {arXiv},
     doi = {10.1051/0004-6361/202348889},
     eid = {A36},
     eprint = {2402.04343},
     keywords = {accretion, accretino disks, techniques: spectroscopic, stars: low-mass, stars: protostars, ISM: jets and outflows, infrared: ISM, Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Astrophysics of Galaxies},
     primaryclass = {astro-ph.SR}
   }
   

3. Tychoniec, Ł., van Dishoeck, E. F., van’t Hoff, M. L. R., van Gelder, M. L., Tabone Benoı̂t, Chen, Y., Harsono, D., Hull, C. L. H., Hogerheijde, M. R., Murillo, N. M., & Tobin, J. J. (2021). Which molecule traces what: Chemical diagnostics of protostellar sources. Astronomy & Astrophysics, 655, A65.

   DOI BIB

   @article{Tychoniec.vanDishoeck.ea2021,
     author = {{Tychoniec}, {\L}ukasz and {van Dishoeck}, Ewine F. and {van't Hoff}, Merel L.~R. and {van Gelder}, Martijn L. and {Tabone}, Beno{\^\i}t and {Chen}, Yuan and {Harsono}, Daniel and {Hull}, Charles L.~H. and {Hogerheijde}, Michiel R. and {Murillo}, Nadia M. and {Tobin}, John J.},
     journal = {Astronomy & Astrophysics},
     title = {{Which molecule traces what: Chemical diagnostics of protostellar sources}},
     year = {2021},
     month = nov,
     pages = {A65},
     volume = {655},
     adsnote = {Provided by the SAO/NASA Astrophysics Data System},
     adsurl = {https://ui.adsabs.harvard.edu/abs/2021A&A...655A..65T},
     archiveprefix = {arXiv},
     doi = {10.1051/0004-6361/202140692},
     eid = {A65},
     eprint = {2107.03696},
     keywords = {stars: formation, astrochemistry, techniques: interferometric, ISM: molecules, submillimeter: ISM, Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Astrophysics of Galaxies},
     primaryclass = {astro-ph.SR}
   }
   

4. Tychoniec, Ł., Manara, C. F., Rosotti, G. P., van Dishoeck, E. F., Cridland , A. J., Hsieh, T.-H., Murillo, N. M., Segura-Cox, D., van Terwisga, S. E., & Tobin, J. J. (2020). Dust masses of young disks: constraining the initial solid reservoir for planet formation. Astronomy & Astrophysics, 640, A19.

   DOI BIB

   @article{Tychoniec.Manara.ea2020,
     author = {{Tychoniec}, {\L}ukasz and {Manara}, Carlo F. and {Rosotti}, Giovanni P. and {van Dishoeck}, Ewine F. and {Cridland }, Alexander J. and {Hsieh}, Tien-Hao and {Murillo}, Nadia M. and {Segura-Cox}, Dominique and {van Terwisga}, Sierk E. and {Tobin}, John J.},
     journal = {Astronomy & Astrophysics},
     title = {{Dust masses of young disks: constraining the initial solid reservoir for planet formation}},
     year = {2020},
     month = aug,
     pages = {A19},
     volume = {640},
     adsnote = {Provided by the SAO/NASA Astrophysics Data System},
     adsurl = {https://ui.adsabs.harvard.edu/abs/2020A&A...640A..19T},
     archiveprefix = {arXiv},
     doi = {10.1051/0004-6361/202037851},
     eid = {A19},
     eprint = {2006.02812},
     keywords = {protoplanetary disks, planets and satellites: formation, instrumentation: interferometers, stars: formation, submillimeter: ISM, planets and satellites: gaseous planets, Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Astrophysics of Galaxies, Astrophysics - Solar and Stellar Astrophysics},
     primaryclass = {astro-ph.EP}
   }
   

5. Tychoniec, Ł., Hull, C. L. H., Kristensen, L. E., Tobin, J. J., Le Gouellec, V. J. M., & van Dishoeck, E. F. (2019). Chemical and kinematic structure of extremely high-velocity molecular jets in the Serpens Main star-forming region. Astronomy & Astrophysics, 632, A101.

   DOI BIB

   @article{Tychoniec.Hull.ea2019,
     author = {{Tychoniec}, {\L}ukasz and {Hull}, Charles L.~H. and {Kristensen}, Lars E. and {Tobin}, John J. and {Le Gouellec}, Valentin J.~M. and {van Dishoeck}, Ewine F.},
     journal = {Astronomy & Astrophysics},
     title = {{Chemical and kinematic structure of extremely high-velocity molecular jets in the Serpens Main star-forming region}},
     year = {2019},
     month = dec,
     pages = {A101},
     volume = {632},
     adsnote = {Provided by the SAO/NASA Astrophysics Data System},
     adsurl = {https://ui.adsabs.harvard.edu/abs/2019A&A...632A.101T},
     archiveprefix = {arXiv},
     doi = {10.1051/0004-6361/201935409},
     eid = {A101},
     eprint = {1910.07857},
     keywords = {astrochemistry, ISM: jets and outflows, techniques: interferometric, stars: protostars, submillimeter: ISM, line: profiles, Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Astrophysics of Galaxies},
     primaryclass = {astro-ph.SR}
   }
   

6. Tychoniec, Ł., Tobin, J. J., Karska, A., Chandler, C., Dunham, M. M., Harris, R. J., Kratter, K. M., Li, Z.-Y., Looney, L. W., Melis, C., Pérez, L. M., Sadavoy, S. I., Segura-Cox, D., & van Dishoeck, E. F. (2018). The VLA Nascent Disk and Multiplicity Survey of Perseus Protostars (VANDAM). IV. Free-Free Emission from Protostars: Links to Infrared Properties, Outflow Tracers, and Protostellar Disk Masses. The Astrophysical Journal Supplement Series, 238(2), 19.

   DOI BIB Abstract

   @article{Tychoniec.Tobin.ea2018a,
     author = {Tychoniec, {\L}. and Tobin, J. J. and Karska, A. and Chandler, C. and Dunham, M. M. and Harris, R. J. and Kratter, K. M. and Li, Z.-Y. and Looney, L. W. and Melis, C. and P{\'e}rez, L. M. and Sadavoy, S. I. and Segura-Cox, D. and van Dishoeck, E. F.},
     journal = {The Astrophysical Journal Supplement Series},
     title = {The VLA Nascent Disk and Multiplicity Survey of Perseus Protostars (VANDAM). IV. Free-Free Emission from Protostars: Links to Infrared Properties, Outflow Tracers, and Protostellar Disk Masses},
     year = {2018},
     month = oct,
     number = {2},
     pages = {19},
     volume = {238},
     adsnote = {Provided by the SAO/NASA Astrophysics Data System},
     adsurl = {https://ui.adsabs.harvard.edu/abs/2018ApJS..238...19T},
     archiveprefix = {arXiv},
     doi = {10.3847/1538-4365/aaceae},
     eid = {19},
     eprint = {1806.02434},
     keywords = {protoplanetary disks, radio continuum: stars, stars: formation, stars: protostars, stars: winds, outflows, techniques: interferometric},
     primaryclass = {astro-ph.SR}
   }
   

   Emission from protostars at centimeter radio wavelengths has been shown
   to trace the free-free emission arising from ionizing shocks as a
   result of jets and outflows driven by protostars. Therefore, measuring
   properties of protostars at radio frequencies can provide valuable
   insights into the nature of their outflows and jets. We present a C-band
   (4.1 and 6.4 cm) survey of all known protostars (Class 0 and Class I) in
   Perseus as part of the VLA Nascent Disk and Multiplicity (VANDAM)
   Survey. We examine the known correlations between radio flux density and
   protostellar parameters, such as bolometric luminosity and outflow
   force, for our sample. We also investigate the relationship between
   radio flux density and far-infrared line luminosities from Herschel. We
   show that free-free emission most likely originates from J-type
   shocks; however, the large scatter indicates that those two types of
   emission probe different time and spatial scales. Using C-band fluxes,
   we removed an estimation of free-free contamination from the
   corresponding Ka-band (9 mm) flux densities that primarily probe dust
   emission from embedded disks. We find that the compact (\lt1\Prime)
   dust emission is lower for Class I sources (median dust mass 96 M
   _⊕) relative to Class 0 (248 M _⊕), but
   several times higher than in Class II (5-15 M _⊕).
   If this compact dust emission is tracing primarily the embedded disk, as
   is likely for many sources, this result provides evidence of decreasing
   disk masses with protostellar evolution, with sufficient mass for
   forming giant planet cores primarily at early times.

7. Tychoniec, Ł., Tobin, J. J., Karska, A., Chandler, C., Dunham, M. M., Li, Z.-Y., Looney, L. W., Segura-Cox, D., Harris, R. J., Melis, C., & Sadavoy, S. I. (2018). The VLA Nascent Disk And Multiplicity Survey of Perseus Protostars (VANDAM). III. Extended Radio Emission from Protostars in Perseus. The Astrophysical Journal, 852(1), 18.

   DOI BIB Abstract

   @article{Tychoniec.Tobin.ea2018,
     author = {Tychoniec, {\L}. and Tobin, J. J. and Karska, A. and Chandler, C. and Dunham, M. M. and Li, Z.-Y. and Looney, L. W. and Segura-Cox, D. and Harris, R. J. and Melis, C. and Sadavoy, S. I.},
     journal = {The Astrophysical Journal},
     title = {The VLA Nascent Disk And Multiplicity Survey of Perseus Protostars (VANDAM). III. Extended Radio Emission from Protostars in Perseus},
     year = {2018},
     month = jan,
     number = {1},
     pages = {18},
     volume = {852},
     adsnote = {Provided by the SAO/NASA Astrophysics Data System},
     adsurl = {https://ui.adsabs.harvard.edu/abs/2018ApJ...852...18T},
     archiveprefix = {arXiv},
     doi = {10.3847/1538-4357/aa9980},
     eid = {18},
     eprint = {1711.03035},
     keywords = {radio continuum: stars, stars: formation, stars: jets, stars: protostars, stars: winds, outflows, techniques: interferometric},
     primaryclass = {astro-ph.SR}
   }
   

   Centimeter continuum emission from protostars offers insight into the
   innermost part of the outflows, as shock-ionized gas produces
   free\ndashfree emission. We observed a complete population of Class 0
   and I protostars in the Perseus molecular cloud at 4.1 and 6.4 cm with
   resolution and sensitivity superior to previous surveys. From a total of
   71 detections, eight sources exhibit resolved emission at 4.1 cm and/or
   6.4 cm. In this paper, we focus on this subsample, analyzing their
   spectral indices along the jet and their alignment with respect to the
   large-scale molecular outflow. Spectral indices for fluxes integrated
   toward the position of the protostar are consistent with free\ndashfree
   thermal emission. The value of the spectral index along a radio jet
   decreases with distance from the protostar. For six sources, emission is
   well aligned with the outflow central axis, showing that we observe the
   ionized base of the jet. This is not the case for two sources, where we
   note misalignment of the emission with respect to the large-scale
   outflow. This might indicate that the emission does not originate in the
   radio jet, but rather in an ionized outflow cavity wall or disk surface.
   For five of the sources, the spectral indices along the jet decrease
   well below the thermal free\ndashfree limit of \minus0.1 with \gt
   2σ  significance. This is indicative of synchrotron emission,
   meaning that high-energy electrons are being produced in the outflows
   close to the disk. This result can have far-reaching implications for
   the chemical composition of the embedded disks.