Zobrazeno 1 - 10
of 20 048
pro vyhledávání: '"van Gelder, A."'
Autor:
Slavicinska, Katerina, Boogert, Adwin, Tychoniec, Łukasz, van Dishoeck, Ewine F., van Gelder, Martijn L., Santos, Julia C., Klaassen, Pamela D., Kavanagh, Patrick J., Chuang, Ko-Ju
Sulfur is depleted with respect to its cosmic standard abundance in dense star-forming regions. It has been suggested that this depletion is caused by the freeze-out of sulfur on interstellar dust grains, but the observed abundances and upper limits
Externí odkaz:
http://arxiv.org/abs/2410.02860
Autor:
van Gelder, M. L., Francis, L., van Dishoeck, E. F., Tychoniec, Ł., Ray, T. P., Beuther, H., Garatti, A. Caratti o, Chen, Y., Devaraj, R., Gieser, C., Justtanont, K., Kavanagh, P. J., Nazari, P., Reyes, S., Rocha, W. R. M., Slavicinska, K., Güdel, M., Henning, Th., Lagage, P. -O., Wright, G.
Publikováno v:
A&A 692, A197 (2024)
The MIRI-MRS instrument onboard JWST allows for probing the molecular gas composition at mid-IR wavelengths at unprecedented resolution and sensitivity. It is important to study these features in low-mass embedded protostellar systems since the forma
Externí odkaz:
http://arxiv.org/abs/2410.01636
Autor:
Brunken, N. G. C., van Dishoeck, E. F., Slavicinska, K., Gouellec, V. J. M. le, Rocha, W. R. M., Francis, L., Tychoniec, L., van Gelder, M. L., Navarro, M. G., Boogert, A. C. A., Kavanagh, P. J., Nazari, P., Greene, T., Ressler, M. E., Majumdar, L.
Publikováno v:
A&A 692, A163 (2024)
The carbon isotope ratio is a powerful tool for studying the evolution of stellar systems. Recent detections of CO isotopologues in disks and exoplanet atmospheres pointed towards significant fractionation in these systems. In order to understand the
Externí odkaz:
http://arxiv.org/abs/2409.17237
Autor:
Garatti, A. Caratti o, Ray, T. P., Kavanagh, P. J., McCaughrean, M. J., Gieser, C., Giannini, T., van Dishoeck, E. F., Justtanont, K., van Gelder, M. L., Francis, L., Beuther, H., Tychoniec, Ł., Nisini, B., Navarro, M. G., Devaraj, R., Reyes, S., Nazar, P., Klaassen, P., Güdel, M., Henning, Th., Lagage, P. O., Östlin, G., Vandenbussche, B., Waelkens, C., Wright, G.
Publikováno v:
A&A 691, A134 (2024)
We use the James Webb Space Telescope (JWST) and its Mid-Infrared Instrument (MIRI) (5-28 um), to study the embedded HH 211 flow. We map a 0.95'x0.22' region, covering the full extent of the blue-shifted lobe, the central protostellar region, and a s
Externí odkaz:
http://arxiv.org/abs/2409.16061
Autor:
Barsony, Mary, Ressler, Michael E., Gouellec, Valentin J. M. Le, Tychoniec, Łukasz, van Gelder, Martijn L.
We report the discovery of jets emanating from pre-main-sequence objects exclusively at mid-infrared wavelengths, enabled by the superb sensitivity of JWST's Mid-InfraRed Medium-Resolution Spectrometer (MIRI MRS) instrument. These jets are observed o
Externí odkaz:
http://arxiv.org/abs/2409.03016
Autor:
Chen, Y., Rocha, W. R. M., van Dishoeck, E. F., van Gelder, M. L., Nazari, P., Slavicinska, K., Francis, L., Tabone, B., Ressler, M. E., Klaassen, P. D., Beuther, H., Boogert, A. C. A., Gieser, C., Kavanagh, P. J., Perotti, G., Gouellec, V. J. M. Le, Majumdar, L., Güdel, M., Henning, Th.
Publikováno v:
A&A 690, A205 (2024)
A rich inventory of complex organic molecules (COMs) has been observed in high abundances in the gas phase toward Class 0 protostars. These molecules are suggested to be formed in ices and sublimate in the warm inner envelope close to the protostar.
Externí odkaz:
http://arxiv.org/abs/2407.20066
Autor:
Santos, Julia C., van Gelder, Martijn L., Nazari, Pooneh, Ahmadi, Aida, van Dishoeck, Ewine F.
Publikováno v:
A&A 689, A248 (2024)
We investigate the chemical history of interstellar OCS and SO2 by deriving a statistically-significant sample of gas-phase column densities towards massive protostars and comparing to observations of gas and ices towards other sources spanning from
Externí odkaz:
http://arxiv.org/abs/2407.14711
Autor:
Assani, Korash, Harsono, Daniel, Ramsey, Jon, Li, Zhi-Yun, Bjerkeli, Per, Pontoppidan, Klaus, Tychoniec, Łukasz, Calcutt, Hannah, Kristensen, Lars, Jorgensen, Jes, Plunkett, Adele, van Gelder, Martijn, Francis, Logan
Publikováno v:
A&A 688, A26 (2024)
(abridged) Protostellar outflows exhibit large variations in their structure depending on the observed gas emission. This study analyzes the atomic jet and molecular outflow in the Class I protostar, TMC1A to characterize morphology and identify prev
Externí odkaz:
http://arxiv.org/abs/2404.18334
Expressing plant metabolic pathways in microbial platforms is an efficient, cost-effective solution for producing many desired plant compounds. As eukaryotic organisms, yeasts are often the preferred platform. However, expression of plant enzymes in
Externí odkaz:
http://arxiv.org/abs/2403.12912
Autor:
Nazari, P., Tabone, B., Ahmadi, A., Cabrit, S., van Dishoeck, E. F., Codella, C., Ferreira, J., Podio, L., Tychoniec, Ł., van Gelder, M. L.
Publikováno v:
A&A 686, A201 (2024)
Protostellar disks are known to accrete, however, the exact mechanism that extracts the angular momentum and drives accretion in the low-ionization "dead" region of the disk is under debate. In recent years, magneto-hydrodynamic (MHD) disk winds have
Externí odkaz:
http://arxiv.org/abs/2402.18631