Zobrazeno 1 - 10
of 914
pro vyhledávání: '"Kenyon S"'
Autor:
Kenyon S. Tweedell
Publikováno v:
The Scientific World Journal, Vol 10, Pp 954-971 (2010)
The developmental potential of the limb regeneration blastema, a mass of mesenchymal cells of mixed origins, was once considered as being pluripotent, capable of forming all cell types. Now evidence asserts that the blastema is a heterogeneous mixtur
Externí odkaz:
https://doaj.org/article/1ed204ec1df5495089a108218bba74f0
Autor:
Kenyon S. Tweedell
Publikováno v:
The Scientific World Journal, Vol 4, Pp 662-715 (2004)
This article is intended to give the nonspecialist an insight into the nuances of “clones”, cloning, and stem cells. It distinguishes embryonic and adult stem cells, their normal function in the organism, their origin, and how they are recovered
Externí odkaz:
https://doaj.org/article/84a9019ac5bd48a3bee3817ee1e24b6b
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