Zobrazeno 1 - 10
of 77
pro vyhledávání: '"Ruaud, M."'
Autor:
Wakelam, V., Gratier, P., Ruaud, M., Gal, R. Le, Majumdar, L., Loison, J. -C., Hickson, K. M.
Aims: Interstellar molecules form early in the evolutionary sequence of interstellar material that eventually forms stars and planets. To understand this evolutionary sequence, it is important to characterize the chemical composition of its first ste
Externí odkaz:
http://arxiv.org/abs/2103.09526
We present a study of the elemental depletion in the interstellar medium. We combined the results of a Galatic model describing the gas physical conditions during the formation of dense cores with a full-gas-grain chemical model. During the transitio
Externí odkaz:
http://arxiv.org/abs/2007.11788
Autor:
Grundy, W. M., Bird, M. K., Britt, D. T., Cook, J. C., Cruikshank, D. P., Howett, C. J. A., Krijt, S., Linscott, I. R., Olkin, C. B., Parker, A. H., Protopapa, S., Ruaud, M., Umurhan, O. M., Young, L. A., Ore, C. M. Dalle, Kavelaars, J. J., Keane, J. T., Pendleton, Y. J., Porter, S. B., Scipioni, F., Spencer, J. R., Stern, S. A., Verbiscer, A. J., Weaver, H. A., Binzel, R. P., Buie, M. W., Buratti, B. J., Cheng, A., Earle, A. M., Elliott, H. A., Gabasova, L., Gladstone, G. R., Hill, M. E., Horanyi, M., Jennings, D. E., Lunsford, A. W., McComas, D. J., McKinnon, W. B., McNutt Jr., R. L., Moore, J. M., Parker, J. W., Quirico, E., Reuter, D. C., Schenk, P. M., Schmitt, B., Showalter, M. R., Singer, K. N., Weigle II, G. E., Zangari, A. M.
The outer Solar System object (486958) Arrokoth (provisional designation 2014 MU$_{69}$) has been largely undisturbed since its formation. We study its surface composition using data collected by the New Horizons spacecraft. Methanol ice is present a
Externí odkaz:
http://arxiv.org/abs/2002.06720
Molecular oxygen has been the subject of many observational searches as chemical models predicted it to be a reservoir of oxygen. Although it has been detected in two regions of the interstellar medium, its rarity is a challenge for astrochemical mod
Externí odkaz:
http://arxiv.org/abs/1905.00800
Publikováno v:
A&A 611, A96 (2018)
Aims. We study the effect of large scale dynamics on the molecular composition of the dense interstellar medium during the transition between diffuse to dense clouds. Methods. We followed the formation of dense clouds (on sub-parsec scales) through t
Externí odkaz:
http://arxiv.org/abs/1712.06696
Publikováno v:
Molecular Astrophysics, Volume 6, March 2017, Pages 22 - 35
Recent laboratory measurements have confirmed that chemical desorption (desorption of products due to exothermic surface reactions) can be an efficient process. The impact of including this process into gas-grain chemical models entirely depends on t
Externí odkaz:
http://arxiv.org/abs/1701.06492
Autor:
Majumdar, L., Gratier, P., Ruaud, M., Wakelam, V., Vastel, C., Sipilä, O., Hersant, F., Dutrey, A., Guilloteau, S.
Deuterated species are unique and powerful tools in astronomy since they can probe the physical conditions, chemistry, and ionization level of various astrophysical media. Recent observations of several deuterated species along with some of their spi
Externí odkaz:
http://arxiv.org/abs/1612.07845
Publikováno v:
A&A 594, A35 (2016)
Protoplanetary disks are the target of many chemical studies (both observational and theoretical) as they contain the building material for planets. Their large vertical and radial gradients in density and temperature make them challenging objects fo
Externí odkaz:
http://arxiv.org/abs/1609.01471
Publikováno v:
2015 MNRAS Letters, Vol 453, Issue 1, p.L48-L52
The ketenyl radical (HCCO) has recently been discovered in two cold dense clouds with a non-negligible abundance of a few 1e-11 (compared to H2) (Agundez et al. 2015). Until now, no chemical network has been able to reproduce this observation. We pro
Externí odkaz:
http://arxiv.org/abs/1509.00336
Autor:
Wakelam, V., Loison, J. -C., Herbst, E., Pavone, B., Bergeat, A., Béroff, K., Chabot, M., Faure, A., Galli, D., Geppert, W. D., Gerlich, D., Gratier, P., Harada, N., Hickson, K. M., Honvault, P., Klippenstein, S. J., Picard, S. D. Le, Nyman, G., Ruaud, M., Schlemmer, S., Sims, I. R., Talbi, D., Tennyson, J., Wester, R.
Chemical models used to study the chemical composition of the gas and the ices in the interstellar medium are based on a network of chemical reactions and associated rate coefficients. These reactions and rate coefficients are partially compiled from
Externí odkaz:
http://arxiv.org/abs/1503.01594