Zobrazeno 1 - 10
of 6 869
pro vyhledávání: '"D/H ratio"'
Autor:
Bézard, B., Nixon, C. A., Vinatier, S., Lellouch, E., Greathouse, T., Giles, R., Lombardo, N. A., Jolly, A.
We report observations of deuterated acetylene (C$_2$HD) at 19.3 $\mu$m (519 cm$^{-1}$) with the Texas Echelon Cross Echelle Spectrograph on the NASA Infrared Telescope Facility in July 2017. Six individual lines from the Q-branch of the $\nu_4$ band
Externí odkaz:
http://arxiv.org/abs/2407.20882
Autor:
Guarneri, Francesco, Pasquini, Luca, D'Odorico, Valentina, Cristiani, Stefano, Cupani, Guido, Di Marcantonio, Paolo, Hernández, J. I. González, Martins, C. J. A. P., Mascareño, Alejandro Suárez, Milaković, Dinko, Molaro, Paolo, Murphy, Michael T., Nunes, Nelson J., Palle, Enric, Pepe, Francesco, Rebolo, Rafael, Santos, Nuno C., Santos, Ricardo Génova, Schmidt, Tobias M., Sousa, Sérgio G., Sozzetti, Alessandro, Trost, Andrea
Primordial abundances of light elements are sensitive to the physics of the early Universe and can directly constrain cosmological quantities, such as the baryon-to-photon ratio $\eta_{10}$, the baryon density and the number of neutrino families. Deu
Externí odkaz:
http://arxiv.org/abs/2402.05586
Autor:
Friedman, S. D., Chayer, P., Jenkins, E. B., Tripp, T. M., Williger, G. M., Hebrard, G., Sonnentrucker, P.
We present high S/N measurements of the H I Ly alpha absorption line toward 16 Galactic targets which are at distances between approximately 190 and 2200 pc, all beyond the wall of the Local Bubble. We describe the models used to remove stellar emiss
Externí odkaz:
http://arxiv.org/abs/2301.13226
Akademický článek
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Autor:
Ali-Dib, Mohamad, Lakhlani, Gunjan
We investigate the deep water abundance of Neptune using a simple 2-component (core + envelope) toy model. The free parameters of the model are the total mass of heavy elements in the planet (Z), the mass fraction of Z in the envelope (f_env), and th
Externí odkaz:
http://arxiv.org/abs/1709.04425
Publikováno v:
In Geochimica et Cosmochimica Acta 1 December 2019 266:382-415
Akademický článek
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Autor:
Ali-Dib, Mohamad, Martin, Rebecca G., Petit, Jean-Marc, Mousis, Olivier, Vernazza, Pierre, Lunine, Jonathan I.
Publikováno v:
A&A 583, A58 (2015)
Comets and chondrites show non-monotonic behaviour of their Deuterium to Hydrogen (D/H) ratio as a function of their formation location from the Sun. This is difficult to explain with a classical protoplanetary disk model that has a decreasing temper
Externí odkaz:
http://arxiv.org/abs/1508.00263
The ratio of deuterium to hydrogen (D/H ratio) of Solar System bodies is an important clue to their formation histories. Here we fit a Neptunian atmospheric model to Gemini Near Infrared Spectrograph (GNIRS) high spectral resolution observations and
Externí odkaz:
http://arxiv.org/abs/1503.06505
Autor:
Owen, James E., Jacquet, Emmanuel
The D/H ratio of water in protostellar systems is a result of both inheritance from the parent molecular cloud and isotopic exchange in the disc. A possibly widespread feature of disc evolution, ignored in previous studies, is accretion bursts (or FU
Externí odkaz:
http://arxiv.org/abs/1410.6844