Suvrath Mahadevan

Refining Exoplanet Ephemerides and Transit Observing Strategies (2009)

Kane, Stephen R., Mahadevan, Suvrath, Von Braun, Kaspar, Laughlin, Gregory, Ciardi, David R.

Transiting planet discoveries have yielded a plethora of information regarding the internal structure and atmospheres of extra-solar planets. These discoveries have been restricted to the...

Direct Detection of Planets Orbiting Large Angular Diameter Stars: Sensitivity of an Internally-Occulting Space-Based Coronagraph (2009)

Crepp, Justin R., Mahadevan, Suvrath, Ge, Jian

High-contrast imaging observations of large angular diameter stars enable complementary science questions to be addressed compared to the baseline goals of proposed missions like the Terrestrial...

Direct Detection of Planets Orbiting Large Angular Diameter Stars: Sensitivity of an Internally Occulting Space-based Coronagraph (2009)

Crepp, Justin R., Mahadevan, Suvrath, Ge, Jian

High-contrast imaging observations of large angular diameter stars enable complementary science questions to be addressed compared to the baseline goals of proposed missions like the Terrestrial...

Discovery of a low-mass companion to the solar-type star TYC 2534-698-1 (2009)

Kane, Stephen R., Mahadevan, Suvrath, Cochran, William D., Street, Rachel A., Sivarani, Thirupathi, Henry, Gregory W., ...

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 serendipitous discovery of a...

Discovery of a Low-Mass Companion to the Solar-Type Star TYC 2534-698-1 (2008)

Kane, Stephen R., Mahadevan, Suvrath, Cochran, William D., Street, Rachel A., Thirupathi, Sivarani, Henry, Gregory W., ...

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 serendipitous discovery of a...

On The Use of Absorption Cells as a Wavelength Reference for Precision Radial Velocity Measurements in the Near Infrared (2008)

Mahadevan, Suvrath, Ge, Jian

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 infrared are expected to...

An Inexpensive Field-Widened Monolithic Michelson Interferometer for Precision Radial Velocity Measurements (2008)

Mahadevan, Suvrath, Ge, Jian, Fleming, Scott W., Wan, Xiaoke, DeWitt, Curtis, Van Eyken, Julian C., ...

We have constructed a thermally compensated field-widened monolithic Michelson interferometer that can be used with a medium-resolution spectrograph to measure precise Doppler radial velocities of...

Measuring Stellar Radial Velocities with a Dispersed Fixed-Delay Interferometer (2008)

Mahadevan, Suvrath, Van Eyken, Julian, Ge, Jian, DeWitt, Curtis, Fleming, Scott W., Cohen, Roger, ...

We demonstrate the ability to measure precise stellar barycentric radial velocities with the dispersed fixed-delay interferometer technique using the Exoplanet Tracker (ET), an instrument primarily...

An All Sky Extrasolar Planet Survey with new generation multiple object Doppler instruments at Sloan telescope (2007)

Abishek Hariharan, Bo Zhao, Craig Warner, Curtis DeWitt, French Leger, Jian Ge, ...

The All Sky Extrasolar Planet Survey (ASEPS) would use the Sloan 2.5-m wide field telescope and new generation multiple object high throughput Doppler instruments to undertake a large-scale visible...

The First Extrasolar Planet Discovered with a New Generation High Throughput Doppler Instrument (2006)

Ge, Jian, Van Eyken, Julian, Mahadevan, Suvrath, DeWitt, Curtis, Kane, Stephen R., Cohen, Roger, ...

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 young star with solar...

THE FIRST EXTRASOLAR PLANET DISCOVERED WITH A NEW-GENERATION HIGH-THROUGHPUT DOPPLER INSTRUMENT (2006)

Jian Ge, Julian Van Eyken, Suvrath Mahadevan, Curtis Dewitt, Stephen R. Kane, Roger Cohen, ...

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 young star with solar...

Observational Signature of Tidal Disruption of a Star by a Massive Black Hole (2005)

Bogdanovic, Tamara, Eracleous, Michael, Mahadevan, Suvrath, Sigurdsson, Steinn, Laguna, Pablo

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 million solar mass...

Tidal Disruption of a Star By a Black Hole : Observational Signature (2004)

Bogdanovic, Tamara, Eracleous, Michael, Mahadevan, Suvrath, Sigurdsson, Steinn, Laguna, Pablo

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 million solar mass...

Observational Signature of Tidal Disruption of a Star by a Massive Black Hole (2004)

Bogdanovic, Tamara, Eracleous, Michael, Mahadevan, Suvrath, Sigurdsson, Steinn, Laguna, Pablo

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 million solar mass...

Evidence of Planetesimal infall on to the very young Herbig Be star LkH$_\alpha$234 (2004)

Chakraborty, Abhijit, Ge, Jian, Mahadevan, Suvrath

We report here the first evidence for planetesimal infall onto the very young Herbig Be star LkH$_\alpha$234. These results are based on observations acquired over 31 days using spectroscopy of the...

All Sky Doppler Extrasolar Planet Surveys with a Multi-object Dispersed Fixed-delay Interferometer (2002)

Ge, Jian, Mahadevan, Suvrath, Van Eyken, Julian, DeWitt, Curtis, Shaklan, Stuart

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 combination of a...