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- Center for Astrophysics Harvard & SmithsonianUS124 papers
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33 papers · 1 filter
MMT/AO 5 micron Imaging Constraints on the Existence of Giant Planets Orbiting Fomalhaut at ~13-40 AU
Matthew A. Kenworthy, Eric E. Mamajek, Philip M. Hinz +5
A candidate < 3 Jupiter mass, extrasolar planet was recently imaged by Kalas et al. (2008) using HST/ACS at 12.7" (96 AU) separation from the nearby (d = 7.7 pc) young (~200 Myr) A…
On the Importance of the Interclump Medium for Superionization: O VI Formation in the Wind of Zeta Pup
J. Zsargo, D. J. Hillier, J. -C. Bouret +3
We have studied superionization and X-ray line formation in the spectra of Zeta Pup using our new stellar atmosphere code (XCMFGEN) that can be used to simultaneously analyze optic…
Deep L' and M-band Imaging for Planets Around Vega and epsilon Eridani
A. N. Heinze, Philip M. Hinz, Matthew Kenworthy +2
We have obtained deep Adaptive Optics (AO) images of Vega and epsilon Eri to search for planetary-mass companions. We observed at the MMT in the L' (3.8 micron) and M (4.8 micron)…
The Evolution of Circumstellar Disks in Ophiuchus Binaries
J. Patience, R. L. Akeson, E. L. N. Jensen
Four Ophiuchus binaries, two Class I systems and two Class II systems, with separations of ~450-1100 AU, were observed with the Owens Valley Radio Observatory (OVRO) millimeter int…
High-Resolution Chandra X-ray Imaging and Spectroscopy of the Sigma Orionis Cluster
S. L. Skinner, K. R. Sokal, D. H. Cohen +3
We present results of a 90 ksec Chandra X-ray observation of the young sigma Orionis cluster (age ~3 Myr) obtained with the High Energy Transmission Grating Spectrometer. We use th…
New XMM-Newton observations of SNRs in the SMC
M. D. Filipovic, F. Haberl, P. F. Winkler +6
A complete overview of the supernova remnant (SNR) population is required to investigate their evolution and interaction with the surrounding interstellar medium in the Small Magel…