Zobrazeno 1 - 10
of 917
pro vyhledávání: '"Kenyon, S"'
Autor:
Farihi, J., van Lieshout, R., Cauley, P. W., Dennihy, E., Su, K. Y. L., Kenyon, S. J., Wilson, T. G., Toloza, O., Gänsicke, B. T., von Hippel, T., Redfield, S., Debes, J. H., Xu, S., Rogers, L., Bonsor, A., Swan, A., Pala, A. F., Reach, W. T.
The infrared dust emission from the white dwarf GD 56 is found to rise and fall by 20% peak-to-peak over 11.2 yr, and is consistent with ongoing dust production and depletion. It is hypothesized that the dust is produced via collisions associated wit
Externí odkaz:
http://arxiv.org/abs/1808.09967
The recent 'Planet Nine' hypothesis has led to many observational and archival searches for this giant planet proposed to orbit the Sun at hundreds of astronomical units. While trans-Neptunian object searches are typically conducted in the optical, m
Externí odkaz:
http://arxiv.org/abs/1712.04950
Autor:
Bromley, B. C., Kenyon, S. J.
We consider the formation of satellites around the Pluto-Charon binary. An early collision between the two partners likely produced the binary and a narrow ring of debris, out of which arose the moons Styx, Nix, Kerberos and Hydra. How the satellites
Externí odkaz:
http://arxiv.org/abs/1503.06805
Autor:
Bromley, B. C., Kenyon, S. J.
We examine characteristics of circumbinary orbits in the context of current planet formation scenarios. Analytical perturbation theory predicts the existence of nested circumbinary orbits that are generalizations of circular paths around a single sta
Externí odkaz:
http://arxiv.org/abs/1503.03876
Autor:
Kenyon, S. J., Bromley, B. C.
We investigate pathways for the formation of icy super-Earth mass planets orbiting at 125-250 AU around a 1 solar mass star. An extensive suite of coagulation calculations demonstrates that swarms of 1 cm to 10 m planetesimals can form super-Earth ma
Externí odkaz:
http://arxiv.org/abs/1501.05659
Autor:
Najita, J. R., Kenyon, S. J.
The high rate of planet detection among solar-type stars argues that planet formation is common. It is also generally assumed that planets form in protoplanetary discs like those observed in nearby star forming regions. On what timescale does the tra
Externí odkaz:
http://arxiv.org/abs/1409.7021
Autor:
Kilic, Mukremin, Brown, Warren R., Gianninas, A., Hermes, J. J., Prieto, Carlos Allende, Kenyon, S. J.
We report the discovery of a detached 20 min orbital period binary white dwarf. WD0931+444 (SDSS J093506.93+441106.9) was previously classified as a WD + M dwarf system based on its optical spectrum. Our time-resolved optical spectroscopy observation
Externí odkaz:
http://arxiv.org/abs/1406.3346
Autor:
Kilic, Mukremin, Gianninas, A., Brown, Warren R., Harris, Hugh C., Dahn, Conard C., Agueros, M. A., Heinke, Craig O., Kenyon, S. J., Panei, J. A., Camilo, Fernando
We present optical spectroscopy, astrometry, radio, and X-ray observations of the runaway binary LP 400-22. We refine the orbital parameters of the system based on our new radial velocity observations. Our parallax data indicate that LP 400-22 is sig
Externí odkaz:
http://arxiv.org/abs/1307.3258
Publikováno v:
In Midwifery October 2019 77:16-23
Autor:
Kilic, Mukremin, Brown, Warren R., Prieto, Carlos Allende, Kenyon, S. J., Heinke, Craig O., Agueros, M. A., Kleinman, S. J.
We present new radial velocity and X-ray observations of extremely low-mass (ELM, 0.2 Msol) white dwarf candidates in the Sloan Digital Sky Survey (SDSS) Data Release 7 area. We identify seven new binary systems with 1-18 h orbital periods. Five of t
Externí odkaz:
http://arxiv.org/abs/1204.0028