Results 21 to 30 of about 9,166,032 (298)

Revisiting the Planet Mass and Stellar Metallicity Relation for Low-Mass Exoplanets Orbiting GKM Class Stars

Universe, 2021
The growing database of exoplanets has shown us the statistical characteristics of various exoplanet populations, providing insight towards their origins.
Jonathan H. Jiang, Daniel Zhao, Xuan Ji, Bohan Xie, Kristen A. Fahy   +4 more
doaj   +1 more source

Dynamical Habitability of Planetary Systems [PDF]

Astrobiology, 2010
The problem of the stability of planetary systems, a question that concerns only multiplanetary systems that host at least two planets, is discussed. The problem of mean motion resonances is addressed prior to discussion of the dynamical structure of the more than 350 known planets.
Dvorak, Rudolf, Pilat-Lohinger, Elke, Bois, Eric, Schwarz, Richard, Funk, Barbara, Beichman, Charles, Danchi, William, Eiroa, Carlos, Fridlund, Malcolm, Henning, Thomas, Herbst, Tom, Kaltenegger, Lisa, Lammer, Helmut, Léger, Alain, Liseau, René, Lunine, Jonathan, Paresce, Francesco, Penny, Alan, Quirrenbach, Andreas, Röttgering, Huub, Selsis, Franck, Schneider, Jean, Stam, Daphne, Tinetti, Giovanna, White, Glenn J.   +24 more
openaire   +4 more sources

Origin and Formation of Planetary Systems [PDF]

Astrobiology, 2010
To estimate the occurrence of terrestrial exoplanets and maximize the chance of finding them, it is crucial to understand the formation of planetary systems in general and that of terrestrial planets in particular. We show that a reliable formation theory should not only explain the formation of the Solar System, with small terrestrial planets within a
Alibert, Y., Broeg, C., Benz, W., Wuchterl, G., Grasset, O., Sotin, C., Eiroa, Carlos, Henning, Thomas, Herbst, Tom, Kaltenegger, Lisa, Léger, Alain, Liseau, Réne, Lammer, Helmut, Beichman, Charles, Danchi, William, Fridlund, Malcolm, Lunine, Jonathan, Paresce, Francesco, Penny, Alan, Quirrenbach, Andreas, Röttgering, Huub, Selsis, Franck, Schneider, Jean, Stam, Daphne, Tinetti, Giovanna, White, Glenn J.   +25 more
openaire   +6 more sources

Summary of the Third International Planetary Dunes Workshop: Remote Sensing and Image Analysis of Planetary Dunes, Flagstaff, Arizona, USA, June 12-15, 2012 [PDF]

, 2013
The Third International Planetary Dunes Workshop took place in Flagstaff, AZ, USA during June 12-15, 2012. This meeting brought together a diverse group of researchers to discuss recent advances in terrestrial and planetary research on aeolian bedforms.
Yizhaq, Hezi, Chojnacki, Matthew, Bishop, Mark Ashley, Bishop, Marc A., Tirsch, Daniela, Neakrase, Lynn D. V., Bourke, Mary C., Newman, Claire E., Rubin, Dave M., Zimbelman, James R., Dinwiddie, Cynthia L., Horgan, Briony H., Neakrase, Lynn D.V., Hayward, Rosalyn K., Michaels, Timothy I., Bishop, Mark A., Zimbleman, James R., Horgan, Briony H. N., Burr, Devon M., Titus, Timothy N., Fenton, Lori K., Fenton, Lori, Kerber, Laura, Le Gall, Alice, Rubin, David M.   +24 more
core   +1 more source

Diagnosis of Combination Faults in a Planetary Gearbox using a Modulation Signal Bispectrum based Sideband Estimator [PDF]

, 2015
This paper presents a novel method for diagnosing combination faults in planetary gearboxes. Vibration signals measured on the gearbox housing exhibit complicated characteristics because of multiple modulations of concurrent excitation sources, signal ...
Gu, Fengshou, Rehab, Ibrahim, Ball, Andrew, Abdallaa, Gaballa M., Tian, Xiange   +4 more
core   +4 more sources

Sensitivity of elastic thickness to water in the Martian lithosphere

Progress in Earth and Planetary Science, 2019
Ancient Mars likely hosted oceans similar to those on Earth; however, such water is not presently observed on Mars. One possible explanation for the lack of present-day oceans is that surface water was transported into and stored within the interior of ...
Ikuo Katayama, Yuhki Matsuoka, Shintaro Azuma   +2 more
doaj   +1 more source

The protoplanetary disc HD 163296 as observed by ALMA

Vietnam Journal of Science, Technology and Engineering, 2022
HD 163296 is one of the few protoplanetary discs displaying rings in the dust component. The present work uses ALMA observations of the 0.9 mm continuum emission, which have significantly better spatial resolution (~8 au) than previously available, to ...
P.N. Diep, D.T. Hoai, N.B. Ngoc, P.T. Nhung, N.T. Phuong, T.T. Thai, P. Tuan-Anh   +6 more
doaj   +1 more source

Misalignment diagnosis of a planetary gearbox based on vibration analysis [PDF]

, 2014
As a critical power transmission system, planetary gearbox is widely used in many industrial important machines such as wind turbines, aircraft turbine engines, helicopters.
Gu, Fengshou, Ball, Andrew, Zhen, Dong, Abdalla, Gaballa, Tian, Xiange   +4 more
core   +3 more sources

MAHLI on Mars: lessons learned operating a geoscience camera on a landed payload robotic arm [PDF]

Geoscientific Instrumentation, Methods and Data Systems, 2016
The Mars Hand Lens Imager (MAHLI) is a 2-megapixel, color camera with resolution as high as 13.9 µm pixel−1. MAHLI has operated successfully on the Martian surface for over 1150 Martian days (sols) aboard the Mars Science Laboratory (MSL) rover ...
R. A. Yingst, K. S. Edgett, M. R. Kennedy, G. M. Krezoski, M. J. McBride, M. E. Minitti, M. A. Ravine, R. M. E. Williams   +7 more
doaj   +1 more source

A Review on Substellar Objects below the Deuterium Burning Mass Limit: Planets, Brown Dwarfs or What?

Geosciences, 2018
“Free-floating, non-deuterium-burning, substellar objects” are isolated bodies of a few Jupiter masses found in very young open clusters and associations, nearby young moving groups, and in the immediate vicinity of the Sun.
José A. Caballero
doaj   +1 more source