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of 2 465
pro vyhledávání: '"DEUTERIUM FRACTIONATION"'
Autor:
Li, Yuqiang, Wang, Junzhi, Li, Juan, Rayalacheruvu, Prathap, Majumdar, Liton, Yan, Yaoting, Quan, Donghui, Lu, Xing, Zheng, Siqi
Deuteration is sensitive to environmental conditions in star-forming regions. To investigate NH$_2$D chemistry, we compared the spatial distribution of ortho-NH$_2$D $1_{11}^s-1_{01}^a$, NH$_3$(1,1) and NH$_3$(2,2) in 12 late-stage massive star-formi
Externí odkaz:
http://arxiv.org/abs/2411.17121
Publikováno v:
A&A 688, A118 (2024)
Molecular deuteration is commonly seen in starless cores and is expected to occur on a timescale comparable to that of the core contraction. Thus, the deuteration serves as a chemical clock, allowing us to investigate dynamical theories of core forma
Externí odkaz:
http://arxiv.org/abs/2405.13317
Autor:
Petrashkevich, I. V., Punanova, A. F., Caselli, P., Sipilä, O., Pineda, J. E., Friesen, R. K., Korotaeva, M. G., Vasyunin, A. I.
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 fraction ($R_D$) changes with environment, compare deuteration of ions and ne
Externí odkaz:
http://arxiv.org/abs/2401.04415
We use spectra and maps of the $J=1-0$ and $J=2-1$ DCO$^{+}$, DCN, DNC, $\rm N_2D^+$ lines and $1_{11}-1_{01}$ ortho- and para-NH$_{2}$D lines, obtained with the IRAM-30m telescope, as well as observations of their hydrogenated isotopologues to study
Externí odkaz:
http://arxiv.org/abs/2309.16510
Autor:
Cosentino, G., Tan, J. C., Jiménez-Serra, I., Fontani, F., Caselli, P., Henshaw, J. D., Barnes, A. T., Law, C. -Y., Viti, S., Fedriani, R., Hsu, C. -J., Gorai, P., Zeng, S.
Publikováno v:
A&A 675, A190 (2023)
Supernova remnants (SNRs) may regulate star formation in galaxies. For example, SNR-driven shocks may form new molecular gas or compress pre-existing clouds and trigger the formation of new stars. To test this scenario, we measure the deuteration of
Externí odkaz:
http://arxiv.org/abs/2306.02877
Autor:
Romero-Mirza, Carlos E., Öberg, Karin I., Law, Charles J., Teague, Richard, Aikawa, Yuri, Bergner, Jennifer B., Wilner, David J., Huang, Jane, Guzmán, Viviana V., Cleeves, L. Ilsedore
Deuterium fractionation provides a window to the thermal history of volatiles in the solar system and protoplanetary disks. While evidence of active molecular deuteration has been observed towards a handful of disks, it remains unclear whether this c
Externí odkaz:
http://arxiv.org/abs/2212.06912
Autor:
Dias, Nureshan, Gurusinghe, Ranil M., Broderick, Bernadette M., Millar, Tom J, Suits, Arthur G.
Direct D-H exchange in radicals is investigated in a quasi-uniform flow employing chirped pulse mm-wave spectroscopy. Inspired by the H-atom catalyzed isomerization of C3H2 reported in our previous study, D atom reactions with the propargyl (C3H3) ra
Externí odkaz:
http://arxiv.org/abs/2212.08680
Autor:
Colzi, L., Martín-Pintado, J., Rivilla, V. M., Jiménez-Serra, I., Zeng, S., Rodríguez-Almeida, L. F., Rico-Villas, F., Martín, S., Requena-Torres, M. A.
The Central Molecular Zone (CMZ) contains most of the mass of our Galaxy but its star formation rate is one order of magnitude lower than in the Galactic disc. This is likely related to the fact that the bulk of the gas in the CMZ is in a warm ($>$10
Externí odkaz:
http://arxiv.org/abs/2202.04111
Autor:
Bacmann, A., Faure, A., Hily-Blant, P., Kobayashi, K., Ozeki, H., Yamamoto, S., Pagani, L., Lique, F.
Although ammonia is an abundant molecule commonly observed towards the dense interstellar medium, it has not yet been established whether its main formation route is from gas-phase ion-molecule reactions or grain-surface hydrogen additions on adsorbe
Externí odkaz:
http://arxiv.org/abs/2009.12382
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