193 citations · 960 across the 11 of their papers we have counts for
11 papers · 1 filter
The ELODIE survey for northern extra-solar planets II. A Jovian planet on a long-period orbit around GJ 777 A
D. Naef, M. Mayor, S. G. Korzennik +8
We present radial-velocity measurements obtained with the ELODIE and AFOE spectrographs for GJ 777 A (HD 190360), a metal-rich ([Fe/H]=0.25) nearby (d=15.9 pc) star in a stellar bi…
Motions of Isolated G-Band Bright Points in the Solar Photosphere
P. Nisenson, A. A. van Ballegooijen, A. G. de Wijn +1
Magnetic elements on the quiet sun are buffeted by convective flows that cause lateral motions on timescales of minutes. The magnetic elements can be observed as bright points (BPs…
Calculation of an optimized telescope apodizer for Terrestrial Planet Finder coronagraphic telescope
R. Gonsalves, P. Nisenson
One of two approaches to implementing NASA's Terrestrial Planet Finder is to build a space telescope that utilizes the techniques of coronagraphy and apodization to suppress diffra…
Detection of Earth-like Planets Using Apodized Telescopes
Peter Nisenson, Costas Papaliolios
The mission of NASA's Terrestrial Planet Finder (TPF) is to find Earth-like planets orbiting other stars and characterize the atmospheres of these planets using spectroscopy. Becau…
A High-Eccentricity Low-Mass Companion to HD 89744
S. G. Korzennik, T. M. Brown, D. A. Fischer +2
HD 89744 is an F7 V star with mass 1.4 M, effective temperature 6166 K, age 2.0 Gy and metallicity [Fe/H]= 0.18. The radial velocity of the star has been monitored with the AFOE sp…
An Upper Limit on the Reflected Light from the Planet Orbiting the Star tau Bootis
David Charbonneau, Robert W. Noyes, Sylvain G. Korzennik +4
The planet orbiting tau Boo at a separation of 0.046 AU could produce a reflected light flux as bright as 1e-4 relative to that of the star. A spectrum of the system will contain a…
A Second Bright Source Detected Near SN1987A
Peter Nisenson, Costas Papaliolios
Speckle interferometry observations, made just 30 and 38 days after the explosion of supernova SN1987A (SN) (which was first seen on February 23, 1987), showed evidence for a brigh…
Dynamics of Magnetic Flux Elements in the Solar Photosphere
A. A. van Ballegooijen, P. Nisenson, R. W. Noyes +4
The interaction of magnetic fields and convection is investigated in the context of the coronal heating problem. We study the motions of photospheric magnetic elements using filter…
Exoplanets or Dynamic Atmospheres? The Radial Velocity and Line Shape Variations of 51 Pegasi and Tau Bootis
Timothy M. Brown, Rubina Kotak, Scott D. Horner +4
Because of our relatively low spectral resolution, we compare our observations with Gray's line bisector data by fitting observed line profiles to an expansion in terms of orthogon…
A Search for Line Shape and Depth Variations in 51 Pegasi and Tau Bootis
T. M. Brown, R. Kotak, S. D. Horner +4
Spectroscopic observations of 51 Pegasi and tau Bootis show no periodic changes in the shapes of their line profiles; these results for 51 Peg are in significant conflict with thos…
A Planet Orbiting the Star Rho Coronae Borealis
R. W. Noyes, S. Jha, S. G. Korzennik +5
We report the discovery of near-sinusoidal radial velocity variations of the G0V star rhoCrB, with period 39.6 days and amplitude 67 m/s. These variations are consistent with the e…