Zobrazeno 1 - 10
of 450
pro vyhledávání: '"Wiesenfeld L"'
Autor:
Giers, K., Spezzano, S., Alves, F., Caselli, P., Redaelli, E., Sipilä, O., Khalifa, M. Ben, Wiesenfeld, L., Brünken, S., Bizzocchi, L.
Publikováno v:
A&A 664, A119 (2022)
Context: In the centre of pre-stellar cores, the deuterium fractionation is enhanced due to the cold temperatures and high densities. Therefore, the chemistry of deuterated molecules can be used to probe the evolution and the kinematics in the earlie
Externí odkaz:
http://arxiv.org/abs/2205.14963
Publikováno v:
EPJ Web of Conferences, Vol 34, p 00001 (2012)
Externí odkaz:
https://doaj.org/article/b66ef598b1dd4345aaa30fad64247b2c
Autor:
Wiesenfeld L., Faure A., Cressiot-Vincent L., Dayou F., Spielfiedel A., Balança C., Feautrier N., Senent M.-L.
Publikováno v:
EPJ Web of Conferences, Vol 34, p 03003 (2012)
The SO2 molecule is detected in a large variety of objects, notably cold dark clouds and star-forming regions. An accurate modeling of the observations requires a very good knowledge of the collisional excitation rates with H2 due to competition betw
Externí odkaz:
https://doaj.org/article/a91934fddb254f87a4ea8dc9a1acebbb
Autor:
Mills, E. A. C., Ginsburg, A., Immer, K., Barnes, J. M, Wiesenfeld, L., Faure, A., Morris, M. R., Requena-Torres, M. A.
We present an analysis of gas densities in the central R=300 parsecs of the Milky Way, focusing on three clouds: GCM-0.02-0.07 (the 50 km/s cloud), GCM-0.13-0.08 (the 20 km/s cloud), and GCM0.25+0.01 (the "Brick"). Densities are determined using obse
Externí odkaz:
http://arxiv.org/abs/1810.00266
Autor:
Ceccarelli, C., Caselli, P., Fontani, F., Neri, R., Lopez-Sepulcre, A., Codella, C., Feng, S., Jimenez-Serra, I., Lefloch, B., Pineda, J. E., Vastel, C., Alves, F., Bachiller, R., Balucani, N., Bianchi, E., Bizzocchi, L., Bottinelli, S., Caux, E., Chacon-Tanarro, A., Choudhury, R., Coutens, A., Dulieu, F., Favre, C., Hily-Blant, P., Holdship, J., Kahane, C., Al-Edhari, A. Jaber, Laas, J., Ospina, J., Oya, Y., Podio, L., Pon, A., Punanova, A., Quenard, D., Rimola, A., Sakai, N., Sim, I. R., Spezzano, S., Taquet, V., Testi, L., Theule, P., Ugliengo, P., Vasyunin, A. I., Viti, S., Wiesenfeld, L., Yamamoto, S.
Complex organic molecules have been observed for decades in the interstellar medium. Some of them might be considered as small bricks of the macromolecules at the base of terrestrial life. It is hence particularly important to understand organic chem
Externí odkaz:
http://arxiv.org/abs/1710.10437
Autor:
Codella, C., Ceccarelli, C., Caselli, P., Balucani, N., Baroneınst, V., Fontani, F., Lefloch, B., Podio, L., Viti, S., Feng, S., Bachiller, R., Bianchi, E., Dulieu, F., Jiménez-Serra, I., Holdship, J., Neri, R., Pineda, J., Pon, A., Sims, I., Spezzano, S., Vasyunin, A. I., Alves, F., Bizzocchi, L., Bottinelli, S., Caux, E., Chacón-Tanarro, A., Choudhury, R., Coutens, A., Favre, C., Hily-Blant, P., Kahane, C., Al-Edhari, A. Jaber, Laas, J., López-Sepulcre, A., Ospina, J., Oya, Y., Punanova, A., Puzzarini, C., Quenard, D., Rimola, A., Sakai, N., Skouteris, D., Taquet, V., Testi, L., Theulé, P., Ugliengo, P., Vastel, C., Vazart, F., Wiesenfeld, L., Yamamoto, S.
Context: Modern versions of the Miller-Urey experiment claim that formamide (NH$_2$CHO) could be the starting point for the formation of metabolic and genetic macromolecules. Intriguingly, formamide is indeed observed in regions forming Solar-type st
Externí odkaz:
http://arxiv.org/abs/1708.04663
Autor:
Fontani, F., Ceccarelli, C., Favre, C., Caselli, P., Neri, R., Sims, I. R., Kahane, C., Alves, F., Balucani, N., Bianchi, E., Caux, E., Al-Edhari, A. Jaber, Lopez-Sepulcre, A., Pineda, J. E., Bachiller, R., Bizzocchi, L., Bottinelli, S., Chacon-Tanarro, A., Choudhury, R., Codella, C., Coutens, A., Dulieu, F., Feng, S., Rimola, A., Hily-Blant, P., Holdship, J., Jimenez-Serra, I., Laas, J., Lefloch, B., Oya, Y., Podio, L., Pon, A., Punanova, A., Quenard, D., Sakai, N., Spezzano, S., Taquet, V., Testi, L., Theulé, P., Ugliengo, P., Vastel, C., Vasyunin, A. I., Viti, S., Yamamoto, S., Wiesenfeld, L.
The interstellar delivery of carbon atoms locked into molecules might be one of the key ingredients for the emergence of life. Cyanopolyynes are carbon chains delimited at their two extremities by an atom of hydrogen and a cyano group, so that they m
Externí odkaz:
http://arxiv.org/abs/1707.01384
We report extensive theoretical calculations on the rotation-inversion excitation of interstellar ammonia (NH3) due to collisions with atomic and molecular hydrogen (both para- and ortho-H2). Close-coupling calculations are performed for total energi
Externí odkaz:
http://arxiv.org/abs/1706.00732
Autor:
Jaber, A. A., Ceccarelli, C., Kahane, C., Viti, S., Balucani, N., Caux, E., Faure, A., Lefloch, B., Lique, F., Mendoza, E., Quenard, D., Wiesenfeld, L.
Publikováno v:
A&A 597, A40 (2017)
Cyanopolyynes are chains of carbon atoms with an atom of hydrogen and a CN group on either side. They are detected almost everywhere in the ISM, as well as in comets. In the past, they have been used to constrain the age of some molecular clouds, sin
Externí odkaz:
http://arxiv.org/abs/1610.00880
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