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Discovery of a Low-Mass Companion to the Solar-Type Star TYC 2534-698-1
Stephen R. Kane, Suvrath Mahadevan, William D. Cochran +4
Brown dwarfs and low-mass stellar companions are interesting objects to study since they occupy the mass region between deuterium and hydrogen burning. We report here the serendipi…
On The Use of Absorption Cells as a Wavelength Reference for Precision Radial Velocity Measurements in the Near Infrared
Suvrath Mahadevan, Jian Ge
Considerable interest is now focused on the detection of terrestrial mass planets around M dwarfs, and radial velocity surveys with high-resolution spectrographs in the near infrar…
An Inexpensive Field-Widened Monolithic Michelson Interferometer for Precision Radial Velocity Measurements
Suvrath Mahadevan, Jian Ge, Scott W. Fleming +4
We have constructed a thermally compensated field-widened monolithic Michelson interferometer that can be used with a medium-resolution spectrograph to measure precise Doppler radi…
Measuring Stellar Radial Velocities with a Dispersed Fixed-Delay Interferometer
Suvrath Mahadevan, Julian van Eyken, Jian Ge +5
We demonstrate the ability to measure precise stellar barycentric radial velocities with the dispersed fixed-delay interferometer technique using the Exoplanet Tracker (ET), an ins…
The First Extrasolar Planet Discovered with a New Generation High Throughput Doppler Instrument
Jian Ge, Julian van Eyken, Suvrath Mahadevan +17
We report the detection of the first extrasolar planet, ET-1 (HD 102195b), using the Exoplanet Tracker (ET), a new generation Doppler instrument. The planet orbits HD 102195, a you…
Observational Signature of Tidal Disruption of a Star by a Massive Black Hole
Tamara Bogdanovic, Michael Eracleous, Suvrath Mahadevan +2
We have modeled the time-variable profiles of the Balmer alpha emission from the nonaxisymmetric disk and debris tail created in the tidal disruption of a solar-type star by a mill…
Tidal Disruption of a Star By a Black Hole : Observational Signature
Tamara Bogdanovic, Michael Eracleous, Suvrath Mahadevan +2
We have modeled the time-variable profiles of the Halpha emission line from the non-axisymmetric disk and debris tail created in the tidal disruption of a solar-type star by a mill…
Observational Signature of Tidal Disruption of a Star by a Massive Black Hole
Tamara Bogdanovic, Michael Eracleous, Suvrath Mahadevan +2
We have modeled the time-variable profiles of the Halpha emission line from the non-axisymmetric disk and debris tail created in the tidal disruption of a solar-type star by a mill…
Evidence of Planetesimal infall on to the very young Herbig Be star LkH234
Abhijit Chakraborty, Jian Ge, Suvrath Mahadevan
We report here the first evidence for planetesimal infall onto the very young Herbig Be star LkH234. These results are based on observations acquired over 31 days using spectro…
First Planet Confirmation with a Dispersed Fixed-Delay Interferometer
J. C. van Eyken, J. Ge, S. Mahadevan +1
The Exoplanet Tracker is a prototype of a new type of fibre-fed instrument for performing high precision relative Doppler measurements to detect extra-solar planets. A combination…
All Sky Doppler Extrasolar Planet Surveys with a Multi-object Dispersed Fixed-delay Interferometer
Jian Ge, Suvrath Mahadevan, Julian van Eyken +2
We propose to use a high throughput and high precision multi-object dispersed fixed-delay interferometer for all sky Doppler surveys for extrasolar planets. This instrument, a comb…