Zobrazeno 1 - 10
of 28
pro vyhledávání: '"E. P. Nelan"'
The 14 Her Planetary System: Companion Masses and Architecture from Radial Velocities and Astrometry
Publikováno v:
The Astronomical Journal, Vol 166, Iss 1, p 27 (2023)
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:
https://doaj.org/article/cfcdb3d775d746cbbc46d8240f8d8b2e
Autor:
G. F. Benedict, B. E. McArthur, E. P. Nelan, R. Wittenmyer, R. Barnes, H. Smotherman, J. Horner
Publikováno v:
The Astronomical Journal. 163:295
With Hubble Space Telescope Fine Guidance Sensor astrometry and published and previously unpublished radial velocity measures we explore the exoplanetary system mu Arae.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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ff9447b0ba2e50891ee30cb45b9b379b
https://doi.org/10.3847/1538-3881/ac6ac8
https://doi.org/10.3847/1538-3881/ac6ac8
Autor:
O. G. Franz, R. J. Patterson, Barbara McArthur, T. E. Harrison, W. F. van Altena, Lawrence H. Wasserman, Arthur J. Bradley, Michael F. Skrutskie, Thomas J. Montemayor, G. Fritz Benedict, E. P. Nelan, D. Story, Peter J. Shelus, Raynor L. Duncombe, J. Rhee, William H. Jefferys, Arthur L. Whipple, P. D. Hemenway, C. L. Slesnick, Laurence W. Fredrick
Publikováno v:
The Astronomical Journal. 126:2549-2556
We present an absolute parallax and relative proper motion for the central star of the planetary nebula NGC 6853 (The Dumbell). We obtain these with astrometric data from FGS 3, a white-light interferometer on {\it HST}. Spectral classifications and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e2794572a830b0461990196ae16b705c
https://doi.org/10.1086/378603
https://doi.org/10.1086/378603
Autor:
G. W. Marcy, T. Forveille, X. Delfosse, William H. Jefferys, William Spiesman, M. Mayor, E. P. Nelan, C. Perrier, Barbara McArthur, Bertrand Goldman, R. P. Butler, G. F. Benedict
Publikováno v:
The Astrophysical Journal. 581:L115-L118
We report the first astrometrically determined mass of an extrasolar planet, a companion previously detected by Doppler spectroscopy. Radial velocities first provided an ephemeris with which to schedule a significant fraction of the {\it HST} observa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c080033dc08b901d8e309caeaed94a00
https://doi.org/10.1086/346073
https://doi.org/10.1086/346073
Autor:
D. Story, W. F. van Altena, G. Fritz Benedict, Arthur L. Whipple, Arthur J. Bradley, T. E. Harrison, E. P. Nelan, Barbara McArthur, Michael F. Skrutskie, Peter J. Shelus, William H. Jefferys, P. D. Hemenway, Raynor L. Duncombe, Lawrence H. Wasserman, J. Rhee, C. L. Slesnick, Laurence W. Fredrick, O. G. Franz, Richard J. Patterson
Publikováno v:
The Astronomical Journal. 124:1695-1705
We present an absolute parallax and relative proper motion for the fundamental distance scale calibrator, delta Cep. We obtain these with astrometric data from FGS 3, a white-light interferometer on HST. Utilizing spectrophotometric estimates of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::90646ff3b91cdc1f26fab2dead848689
https://doi.org/10.1086/342014
https://doi.org/10.1086/342014
Autor:
Laurence W. Fredrick, Raynor L. Duncombe, W. F. van Altena, William H. Jefferys, William Spiesman, D. Story, Barbara McArthur, Arthur J. Bradley, Edward L. Robinson, O. G. Franz, P. D. Hemenway, G. F. Benedict, Lawrence H. Wasserman, J. T. Lee, E. P. Nelan, Peter J. Shelus, Arthur L. Whipple
Publikováno v:
The Astronomical Journal. 119:2382-2390
With HST FGS 3 we have determined a parallax for the white dwarf - M dwarf interacting binary, Feige 24. The white dwarf (DA) component has an effective temperature, T_eff of approximately 56,000 K degrees. A weighted average with past parallax deter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ec4e89ad6df5a7e0d4855f68ed8b52b1
https://doi.org/10.1086/301355
https://doi.org/10.1086/301355
Autor:
Raynor L. Duncombe, Arthur L. Whipple, D. Story, Laurence W. Fredrick, William H. Jefferys, P. D. Hemenway, Wm. F. van Altena, E. P. Nelan, Peter J. Shelus, G. Fritz Benedict, Lawrence H. Wasserman, Otto G. Franz, Barbara McArthur
Publikováno v:
The Astronomical Journal. 116:429-439
We have observed Proxima Centauri and Barnard's Star with Hubble Space Telescope Fine Guidance Sensor 3. Proxima Centauri exhibits small-amplitude, periodic photometric variations. Once several sources of systematic photometric error are corrected, w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3652137970b320baa4f742d3112f95ea
https://doi.org/10.1086/300420
https://doi.org/10.1086/300420
Autor:
O. G. Franz, Arthur L. Whipple, J. Whitney, D. Story, E. P. Nelan, G. F. Benedict, Barbara McArthur, Peter J. Shelus, T. Gerard, J. McCartney, Laurence W. Fredrick, W. F. van Altena, P. D. Hemenway, Larry Wasserman, Raynor L. Duncombe, William H. Jefferys
Publikováno v:
International Astronomical Union Colloquium. 127:68-76
The Fine Guidance Sensors (FGSs) are the instrument of choice for most astrometric measurements with the Hubble Space Telescope (HST). The observed amount of spherical aberration in the Ritchey Chretien optical system does not affect positional measu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ecb3abde3a586355345c75ee8aa9fa62
https://doi.org/10.1017/s0252921100063582
https://doi.org/10.1017/s0252921100063582
Autor:
D. Cornell, Barbara McArthur, G. Fritz Benedict, P. D. Hemenway, D. Story, Lawrence H. Wasserman, William H. Jefferys, David Chappell, E. P. Nelan, Peter J. Shelus, Raynor L. Duncombe, J. T. Lee, Otto G. Franz, Arthur L. Whipple, W. F. van Altena, Laurence W. Fredrick
We report on a sub-stellar companion search utilizing interferometric fringe-tracking astrometry acquired with Fine Guidance Sensor 3 (FGS 3) on the Hubble Space Telescope. Our targets were Proxima Centauri and Barnard's Star. We obtain absolute para
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1103e9f617527b8e6d7ca9461945aa97
Autor:
Barbara McArthur, O. G. Franz, D. Story, Arthur L. Whipple, G. F. Benedict, Laurence W. Fredrick, W. F. van Altena, P. D. Hemenway, William H. Jefferys, Raynor L. Duncombe, Arthur J. Bradley, E. P. Nelan, Peter J. Shelus, K. J. Kreidl, Lawrence H. Wasserman
Publikováno v:
Astronomical and Astrophysical Objectives of Sub-Milliarcsecond Optical Astrometry ISBN: 9780792334439
The HST Astrometry Science Team is using the Fine Guidance Sensors (FGS) in the Transfer Function (TF) Scan mode to search for binaries among the faint members of the Hyades cluster. To date (March 1994), nine binaries have been discovered among 24 s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a1bfc946814439595830c6b2adc0fa3e
https://doi.org/10.1007/978-94-011-0069-4_33
https://doi.org/10.1007/978-94-011-0069-4_33