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4 papers · 1 filter
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…
SUMER Observations Confirm the Dynamic Nature of the Quiet Solar Outer Atmosphere: The Inter-network Chromosphere
Mats Carlsson, Philip G. Judge, Klaus Wilhelm
On 12 March 1996 we obtained observations of the quiet Sun with the SUMER instrument. The observa- tions were sequences of 15-20 second exposures of ultraviolet emission line profi…
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…
Solar internal sound speed as inferred from combined BiSON and LOWL oscillation frequencies
Sarbani Basu, W. J. Chaplin, J. Christensen-Dalsgaard +6
Observations of the Sun with the LOWL instrument provide a homogeneous set of solar p-mode frequencies from low to intermediate degree which allows one to determine the structure o…