Zobrazeno 1 - 10
of 162
pro vyhledávání: '"Nelan, E."'
The 14 Her Planetary System: Companion Masses and Architecture from Radial Velocities and Astrometry
We combine Hubble Space Telescope (HST) Fine Guidance Sensor, Hipparcos, and Gaia DR3 astrometric observations of the K0 V star 14 Her with the results of an analysis of extensive ground-based radial velocity data to determine perturbation orbits and
Externí odkaz:
http://arxiv.org/abs/2305.11753
Autor:
Benedict, G. F., McArthur, B. E., Nelan, E. P., Wittenmyer, R., Barnes, R., Smotherman, H., Horner, J.
With Hubble Space Telescope Fine Guidance Sensor astrometry and published and previously unpublished radial velocity measures we explore the exoplanetary system mu Arae. Our modeling of the radial velocities results in improved orbital elements for t
Externí odkaz:
http://arxiv.org/abs/2204.13706
Autor:
Bellini, A., Libralato, M., Anderson, J., Bennett, D., Calamida, A., Casertano, S., Fall, S. M., Gaudi, B. S., Guhathakurta, P., Ho, S., Lu, J., Malhotra, S., Melchior, P., Nelan, E., Rhodes, J., Sanderson, R. E., Shao, M., Sohn, S. T., Vesperini, E., van der Marel, R. P.
The outer regions of globular clusters can enable us to answer many fundamental questions concerning issues ranging from the formation and evolution of clusters and their multiple stellar populations to the study of stars near and beyond the hydrogen
Externí odkaz:
http://arxiv.org/abs/1903.05085
Autor:
Gallenne, A., Kervella, P., Evans, N. R., Proffitt, C. R, Monnier, J. D., Merand, A., Nelan, E., Winston, E., Pietrzynski, G., Schaefer, G., Gieren, W., Anderson, R. I., Borgniet, S., Kraus, S., Roettenbacher, R. M., Baron, F., Pilecki, B., Taormina, M., Graczyk, D., Mowlavi, N., Eyer, L.
Cepheid stars play a considerable role as extragalactic distances indicators, thanks to the simple empirical relation between their pulsation period and their luminosity. They overlap with that of secondary distance indicators, such as Type Ia supern
Externí odkaz:
http://arxiv.org/abs/1809.07486
Autor:
Chaboyer, B., McArthur, B. E., O'Malley, E., Benedict, G. F., Feiden, G. A., Harrison, T. E., McWilliam, A., Nelan, E. P., Patterson, R. J., Sarajedini, A.
Hubble Space Telescope (HST) fine guidance sensor observations were used to obtain parallaxes of eight metal-poor ([Fe/H] < -1.4) stars. The parallaxes of these stars determined by the revised Hipparcos reduction average 17% accuracy, in contrast to
Externí odkaz:
http://arxiv.org/abs/1702.00803
Autor:
Benedict, G. F., Henry, T. J., Franz, O. G., McArthur, B. E., Wasserman, L. H., Jao, Wei-Chun, Cargile, P. A., Dieterich, S. B., Bradley, A. J., Nelan, E. P., Whipple, A. L.
We present a Mass-Luminosity Relation (MLR) for red dwarfs spanning a range of masses from 0.62 Msun to the end of the stellar main sequence at 0.08 Msun. The relation is based on 47 stars for which dynamical masses have been determined, primarily us
Externí odkaz:
http://arxiv.org/abs/1608.04775
Autor:
Aldoretta, E. J., Caballero-Nieves, S. M., Gies, D. R., Nelan, E. P., Wallace, D. J., Hartkopf, W. I., Henry, T. J., Jao, W. -C., Apellániz, J. Maíz, Mason, B. D., Moffat, A. F. J., Norris, R. P., Richardson, N. D., Williams, S. J.
We present the results of an all-sky survey made with the Fine Guidance Sensor on Hubble Space Telescope to search for angularly resolved binary systems among the massive stars. The sample of 224 stars is comprised mainly of Galactic O- and B-type st
Externí odkaz:
http://arxiv.org/abs/1410.0021
Autor:
Farihi, J., Subasavage, J. P., Nelan, E. P., Harris, H. C., Dahn, C. C., Nordhaus, J., Spiegel, D. S.
The potential existence of a giant planet orbiting within a few AU of a stellar remnant has profound implications for both the survival and possible regeneration of planets during post-main sequence stellar evolution. This paper reports Hubble Space
Externí odkaz:
http://arxiv.org/abs/1205.0806
Autor:
Schlichting, H. E., Ofek, E. O., Wenz, M., Sari, R., Gal-Yam, A., Livio, M., Nelan, E., Zucker, S.
The Kuiper belt is a remnant of the primordial Solar System. Measurements of its size distribution constrain its accretion and collisional history, and the importance of material strength of Kuiper belt objects (KBOs). Small, sub-km sized, KBOs elude
Externí odkaz:
http://arxiv.org/abs/0912.2996
Autor:
Apellániz, J. Maíz, Walborn, Nolan R., Morrell, N. I., Nelan, E. P., Niemela, V. S., Benaglia, P., Sota, A.
We are using HST GO programs 10205, 10602, and 10898 to test the stellar upper mass limit in the solar vicinity by attempting to detect optical close companions, thus lowering the calculated evolutionary masses. We have observed with ACS/HRC all the
Externí odkaz:
http://arxiv.org/abs/astro-ph/0702514