The Nature and Origins of Sub‐Neptune Size Planets

Autor: Sean N. Raymond, Jacob L. Bean, James E. Owen

Publikováno v: Journal of Geophysical Research. Planets

Planets intermediate in size between the Earth and Neptune, and orbiting closer to their host stars than Mercury does the Sun, are the most common type of planet revealed by exoplanet surveys over the last quarter century. Results from NASA's Kepler

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6feb6a70d8252b356468d5d81df6411f
https://doi.org/10.1029/2020je006639

Non-detection of Helium in the Upper Atmospheres of Three Sub-Neptune Exoplanets

Autor: Antonija Oklopčić, Jean-Michel Desert, Jacob L. Bean, Isaac Malsky, Eliza M.-R. Kempton, Megan Mansfield, Leslie A. Rogers, David Kasper

Publikováno v: Astronomical Journal, 160(6):258. IOP Publishing Ltd.

We present a search for helium in the upper atmospheres of three sub-Neptune size planets to investigate the origins of these ubiquitous objects. The detection of helium for a low density planet would be strong evidence for the presence of a primary

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd6f6f251c99edcab559136badfd4af9

Neutron-capture element abundances in the planetary nebula NGC 5315 from deep optical and near-infrared spectrophotometry★†

Autor: Ian U. Roederer, A. L. Mashburn, S. Madonna, Nicholas C. Sterling, Jorge García-Rojas, Adal Mesa-Delgado, Gloria Delgado-Inglada, V. Luridiana

Publikováno v: Monthly Notices of the Royal Astronomical Society. 471:1341-1369

We analyze the chemical composition of the planetary nebula (PN) NGC 5315, through high-resolution (R = 40000) optical spectroscopy with UVES at the Very Large Telescope, and medium-resolution (R = 4800) near-infrared spectroscopy with FIRE at Magell

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9348534b599a81f2410a2c77001c47f9
https://doi.org/10.1093/mnras/stx1585

Early science with the Large Millimeter Telescope: molecules in the extreme outflow of a protoplanetary nebula

Autor: Lizette Guzman-Ramirez, Raghvendra Sahai, Alfredo Montaña, A Luna, Arturo I. Gómez-Ruiz, David H. Hughes, Albert A. Zijlstra, F. P. Schloerb, Gopal Narayanan, M. Chavez-Dagostino, David Sánchez-Arguelles, E. O. Serrano, Mónica Rodríguez, M. S. Yun

Publikováno v: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (ISSN 0035-8711), 467(1), L61-L65
Gómez-Ruiz, A I, Guzman-Ramirez, L, Serrano, E O, Sanchez-Argüelles, D, Luna, A, Schloerb, F P, Narayanan, G, Yun, M S, Sahai, R, Zijlstra, A, Chavez-Dagostino, M, Montaña, A, Hughes, D H & Rodríguez, M 2017, ' Early Science with the Large Millimetre Telescope : Molecules in the Extreme Outflow of a proto-Planetary Nebula ', Monthly Notices of the Royal Astronomical Society, vol. 467, no. 1, pp. L61-L65 . https://doi.org/10.1093/mnrasl/slw259

Extremely high velocity emission likely related to jets is known to occur in some proto-Planetary Nebulae. However, the molecular complexity of this kinematic component is largely unknown. We observed the known extreme outflow from the proto-Planetar

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::247a0f1b9336c7180ed40e046a1a8147
https://doi.org/10.1093/mnrasl/slw259

Effects of protoplanetary nebula on orbital dynamics of planetesimals in the outer Solar system

Autor: David Vokrouhlický, David Nesvorný

Publikováno v: Celestial Mechanics and Dynamical Astronomy. 132

Massive gaseous nebula has been a key element to formation of large solid objects (planetesimals, giant planet cores) in the early phase of the Solar system evolution. Here, we focus on its effects during the stage when giant planets have already ful

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::73a2c3683e3c352299adbf5611f91089
https://doi.org/10.1007/s10569-019-9941-1