Ms. Vidhya Vaitheeswaran Profile

Vidhya Vaitheeswaran

at Univ of Arizona

SPIE Involvement:

Author

Publications (21)

Proceedings Article | 24 July 2018 Presentation + Paper

Presentation + Paper

The HOSTS survey for exo-zodiacal dust: preliminary results and future prospects

S. Ertel, G. Kennedy, D. Defrère, P. Hinz, A. Shannon, B. Mennesson, W. C. Danchi, C. Gelino, J. M. Hill, W. Hoffman, G. Rieke, E. Spalding, J. Stone, A. Vaz, A. Weinberger, P. Willems, O. Absil, P. Arbo, V. Bailey, C. Beichman, G. Bryden, E. Downey, O. Durney, S. Esposito, A. Gaspar, P. Grenz, C. Haniff, J. Leisenring, L. Marion, T. McMahon, R. Millan-Gabet, M. Montoya, K. Morzinski, E. Pinna, J. Power, A. Puglisi, A. Roberge, E. Serabyn, A. Skemer, K. Stapelfeldt, K. Y. L. Su, V. Vaitheeswaran, M. Wyatt

Proceedings Volume 10698, 106981V (2018) https://doi.org/10.1117/12.2313685

KEYWORDS: Stars, Planets, Calibration, Statistical analysis, Exoplanets, Space telescopes, Nulling interferometry, Astronomy, Telescopes, Interferometry

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The presence of large amounts of dust in the habitable zones of nearby stars is a significant obstacle for future exo-Earth imaging missions. We executed the HOSTS (Hunt for Observable Signatures of Terrestrial Systems) survey to determine the typical amount of such exozodiacal dust around a sample of nearby main sequence stars. The majority of the data have been analyzed and we present here an update of our ongoing work. Nulling interferometry in N band was used to suppress the bright stellar light and to detect faint, extended circumstellar dust emission. We present an overview of the latest results from our ongoing work. We find seven new N band excesses in addition to the high confidence confirmation of three that were previously known. We find the first detections around Sun-like stars and around stars without previously known circumstellar dust. Our overall detection rate is 23%. The inferred occurrence rate is comparable for early type and Sun-like stars, but decreases from 71^{+11 -20}% for stars with previously detected mid- to far-infrared excess to 11^{+9 -4}% for stars without such excess, confirming earlier results at high confidence. For completed observations on individual stars, our sensitivity is five to ten times better than previous results. Assuming a lognormal luminosity function of the dust, we find upper limits on the median dust level around all stars without previously known mid to far infrared excess of 11.5 zodis at 95% confidence level. The corresponding upper limit for Sun-like stars is 16 zodis. An LBTI vetted target list of Sun-like stars for exo-Earth imaging would have a corresponding limit of 7.5 zodis. We provide important new insights into the occurrence rate and typical levels of habitable zone dust around main sequence stars. Exploiting the full range of capabilities of the LBTI provides a critical opportunity for the detailed characterization of a sample of exozodiacal dust disks to understand the origin, distribution, and properties of the dust.

Proceedings Article | 24 July 2014 Paper

Paper

Commissioning the LBTI for use as a nulling interferometer and coherent imager

Phil Hinz, Vanessa Bailey, D. Defrère, E. Downey, Simone Esposito, J. Hill, William Hoffmann, J. Leisenring, Manny Montoya, T. McMahon, A. Puglisi, A. Skemer, M. Skrutskie, Vidhya Vaitheeswaran, Amali Vaz

Proceedings Volume 9146, 91460T (2014) https://doi.org/10.1117/12.2057340

KEYWORDS: Calibration, Nulling interferometry, Interferometers, Error analysis, Imaging systems, Telescopes, Stars, Coherence imaging, Sensors, Signal detection

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Proceedings Article | 24 July 2014 Paper

Paper

Co-phasing the Large Binocular Telescope: status and performance of LBTI/PHASECam

D. Defrère, P. Hinz, E. Downey, D. Ashby, V. Bailey, G. Brusa , J. Christou, W. Danchi, P. Grenz, J. Hill, W. Hoffmann, J. Leisenring, J. Lozi, T. McMahon, B. Mennesson, R. Millan-Gabet, M. Montoya, K. Powell, A. Skemer, V. Vaitheeswaran, A. Vaz, C. Veillet

Proceedings Volume 9146, 914609 (2014) https://doi.org/10.1117/12.2057178

KEYWORDS: Telescopes, Mirrors, Phase measurement, Interferometry, Nulling interferometry, Sensors, Space telescopes, Interferometers, Infrared imaging, Exoplanets

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Proceedings Article | 21 July 2014 Paper

Paper

Large binocular telescope interferometer adaptive optics: on-sky performance and lessons learned

Vanessa Bailey, Philip Hinz, Alfio Puglisi, Simone Esposito, Vidhya Vaitheeswaran, Andrew Skemer, Denis Defrère, Amali Vaz, Jarron Leisenring

Proceedings Volume 9148, 914803 (2014) https://doi.org/10.1117/12.2057138

KEYWORDS: Adaptive optics, Point spread functions, Stars, Mirrors, Telescopes, Cameras, Eye, Interferometers, Monochromatic aberrations, Wavefront sensors

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Proceedings Article | 24 September 2012 Paper

Paper

TIGER: a high contrast infrared imager for the Giant Magellan Telescope

Philip Hinz, Johanan Codona, Olivier Guyon, William Hoffmann, Andrew Skemer, Joseph Hora, Volker Tolls, Alan Boss, Alycia Weinberger, Paul Arbo, Thomas Connors, Olivier Durney, Thomas McMahon, Manny Montoya, Vidhya Vaitheeswaran

Proceedings Volume 8446, 84461P (2012) https://doi.org/10.1117/12.926751

KEYWORDS: Coronagraphy, Adaptive optics, Cameras, Stars, Telescopes, Speckle, Infrared telescopes, Infrared imaging, Infrared radiation, Sensors

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Proceedings Article | 24 September 2012 Paper

Paper

On-sky operations and performance of LMIRcam at the Large Binocular Telescope

J. Leisenring, M. Skrutskie, P. Hinz, A. Skemer, V. Bailey, J. Eisner, P. Garnavich, W. Hoffmann, T. Jones, M. Kenworthy, P. Kuzmenko, M. Meyer, M. Nelson, T. Rodigas, J. Wilson, V. Vaitheeswaran

Proceedings Volume 8446, 84464F (2012) https://doi.org/10.1117/12.924814

KEYWORDS: Sensors, Point spread functions, Telescopes, Interferometry, Adaptive optics, Cadmium sulfide, Stars, Mirrors, Electronics, Diffraction

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Proceedings Article | 13 September 2012 Paper

Paper

Design and predicted performance of the GMT ground-layer adaptive optics mode

Philip Hinz, Guido Brusa, Vidhya Vaitheeswaran, Tom McMahon, Tom Connors, Russell Knox, Antonin Bouchez, Manny Montoya

Proceedings Volume 8447, 84473R (2012) https://doi.org/10.1117/12.926727

KEYWORDS: Stars, Adaptive optics, Telescopes, Turbulence, Point spread functions, Sensors, Device simulation, Laser guide stars, Wavefront sensors, Mirrors

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Proceedings Article | 13 September 2012 Paper

Paper

Status of the ARGOS ground layer adaptive optics system

Wolfgang Gässler, Sebastian Rabien, Simone Esposito, Michael Lloyd-Hart, Lothar Barl, Udo Beckmann, Thomas Bluemchen, Marco Bonaglia, José Luis Borelli, Guido Brusa, Joar Brynnel, Peter Buschkamp, Lorenzo Busoni, Luca Carbonaro, Claus Connot, Richard Davies, Matthias Deysenroth, Olivier Durney, Richard Green, Hans Gemperlein, Victor Gasho, Marcus Haug, Pete Hubbard, Sebastian Ihle, Martin Kulas, Reinhard Lederer, Jason Lewis, Christina Loose, Michael Lehmitz, Jamison Noenickx, Edmund Nussbaum, Gilles Orban de Xivry, Diethard Peter, Andreas Quirrenbach, Matt Rademacher, Walfried Raab, Jesper Storm, Christian Schwab, Vidhya Vaitheeswaran, Julian Ziegleder

Proceedings Volume 8447, 844702 (2012) https://doi.org/10.1117/12.926167

KEYWORDS: Telescopes, Wavefront sensors, Mirrors, Sensors, Adaptive optics, Laser systems engineering, Calibration, Laser guide stars, Stars, Optical fabrication

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Proceedings Article | 13 September 2012 Paper

Paper

The Giant Magellan Telescope adaptive optics program

Antonin Bouchez, D. Scott Acton, Guido Agapito, Carmelo Arcidiacono, Francis Bennet, Valdemaro Biliotti, Marco Bonaglia, Runa Briguglio, Guido Brusa-Zappellini, Lorenzo Busoni, Luca Carbonaro, Johanan Codona, Rodolphe Conan, Thomas Connors, Oliver Durney, Brady Espeland, Simone Esposito, Luca Fini, Rusty Gardhouse, Thomas Gauron, Michael Hart, Philip Hinz, Srikrishna Kanneganti, Edward Kibblewhite, Russell Knox, Brian McLeod, Thomas McMahon, Manny Montoya, Timothy Norton, Mark Ordway, Celine d'Orgeville, Simon Parcell, Piotr Piatrou, Enrico Pinna, Ian Price, Alfio Puglisi, Fernando Quiros-Pacheco, Armando Riccardi, John Roll, Gelys Trancho, Kristina Uhlendorf, Vidhya Vaitheeswaran, Marcos van Dam, David Weaver, Marco Xompero

Proceedings Volume 8447, 84471I (2012) https://doi.org/10.1117/12.926691

KEYWORDS: Adaptive optics, Wavefront sensors, Telescopes, Mirrors, Sensors, Laser guide stars, Wavefronts, Tomography, Calibration, Atmospheric optics

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Proceedings Article | 12 September 2012 Paper

Paper

First AO-corrected interferometry with LBTI: steps towards routine coherent imaging observations

Phil Hinz, P. Arbo, V. Bailey, T. Connors, O. Durney, Simone Esposito, W. Hoffmann, T. Jones, J. Leisenring, M. Montoya, M. Nash, M. Nelson, T. McMahon, E. Pinna, A. Puglisi, A. Skemer, M. Skrutskie, V. Vaitheeswaran

Proceedings Volume 8445, 84450U (2012) https://doi.org/10.1117/12.926746

KEYWORDS: Adaptive optics, Telescopes, Interferometry, Prototyping, Stars, Point spread functions, Coherence imaging, Cameras, Imaging systems, Exoplanets

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Proceedings Article | 16 September 2011 Paper

Paper

Latest GLAO results and advancements in laser tomography implementation at the 6.5m MMT telescope

Eduardo Bendek, Michael Hart, Keith Powell, Vidhya Vaitheeswaran, Don McCarthy, Craig Kulesa

Proceedings Volume 8149, 814907 (2011) https://doi.org/10.1117/12.894149

KEYWORDS: Tomography, Telescopes, Stars, Wavefronts, Adaptive optics, Point spread functions, Cameras, Wavefront sensors, Laser guide stars, Turbulence

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Proceedings Article | 16 September 2011 Paper

Paper

Status report on the Large Binocular Telescope's ARGOS ground-layer AO system

M. Hart, S. Rabien, L. Busoni, L. Barl, U. Beckmann, M. Bonaglia, Y. Boose, J. Borelli, T. Bluemchen, L. Carbonaro, C. Connot, M. Deysenroth, R. Davies, O. Durney, M. Elberich, T. Ertl, S. Esposito, W. Gaessler, V. Gasho, H. Gemperlein, P. Hubbard, S. Kanneganti, M. Kulas, K. Newman, J. Noenickx, G. Orban de Xivry, D. Peter, A. Quirrenbach, M. Rademacher, C. Schwab, J. Storm, V. Vaitheeswaran, G. Weigelt, J. Ziegleder

Proceedings Volume 8149, 81490J (2011) https://doi.org/10.1117/12.893916

KEYWORDS: Telescopes, Adaptive optics, Mirrors, Sensors, Stars, Control systems, Cameras, Wavefronts, Beam splitters, Wavefront sensors

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Proceedings Article | 29 July 2010 Paper

Paper

Characterization of synthetic reconstructors for the pyramid wavefront sensor unit of LBTI

V. Bailey, V. Vaitheeswaran, J. Codona, P. Hinz, O. Durney, S. Esposito, E. Pinna, A. Puglisi

Proceedings Volume 7736, 77365G (2010) https://doi.org/10.1117/12.857457

KEYWORDS: Modulation, Wavefront sensors, Telescopes, Picosecond phenomena, Adaptive optics, Sensors, Device simulation, Point spread functions, Stars, Observatories

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Proceedings Article | 20 July 2010 Paper

Paper

The Large Binocular Telescope mid-infrared camera (LMIRcam): final design and status

M. Skrutskie, T. Jones, P. Hinz, P. Garnavich, J. Wilson, M. Nelson, E. Solheid, O. Durney, W. Hoffmann, V. Vaitheeswaran, T. McMahon, J. Leisenring, A. Wong

Proceedings Volume 7735, 77353H (2010) https://doi.org/10.1117/12.857724

KEYWORDS: Mirrors, Sensors, Optical filters, Telescopes, L band, Cameras, Optical benches, Mid-IR, Optical instrument design, Electronics

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Proceedings Article | 19 July 2010 Paper

Paper

Design considerations for LBTI observer interface

V. Vaitheeswaran, P. Hinz, C. O'Connell, J. Kraus

Proceedings Volume 7740, 77402V (2010) https://doi.org/10.1117/12.856453

KEYWORDS: Telescopes, Human-machine interfaces, Control systems, Interfaces, Sensors, Adaptive optics, Astronomical telescopes, Nulling interferometry, Astronomy, Wavefront sensors

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Proceedings Article | 14 July 2010 Paper

Paper

Implementation and on-sky results of an optimal wavefront controller for the MMT NGS adaptive optics system

Keith Powell, Vidhya Vaitheeswaran

Proceedings Volume 7736, 773636 (2010) https://doi.org/10.1117/12.856590

KEYWORDS: Wavefronts, Adaptive optics, Mirrors, Data modeling, Telescopes, Image quality standards, K band, Atmospheric optics, Deformable mirrors, Sensors

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Proceedings Article | 14 July 2010 Paper

Paper

Status of the 6.5m MMT Telescope laser adaptive optics system

Eduardo Bendek, Michael Hart, Keith Powell, Norman Milton, Vidhya Vaitheeswaran, Don McCarthy, Craig Kulesa, Shawn Callahan, S. Mark Ammons, Aurea Garcia Rissmann

Proceedings Volume 7736, 77360O (2010) https://doi.org/10.1117/12.857663

KEYWORDS: Wavefronts, Adaptive optics, Tomography, Stars, Telescopes, Actuators, Laser optics, Wavefront sensors, Control systems, Matrices

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Proceedings Article | 28 July 2008 Paper

Paper

Status of the LBT interferometer

Philip Hinz, Teresa Bippert-Plymate, Andy Breuninger, Tom Connors, Brian Duffy, Simone Esposito, William Hoffmann, Jihun Kim, Joe Kraus, Thomas McMahon, Manny Montoya, Richard Nash, Olivier Durney, Elliott Solheid, Andrea Tozzi, Vidhya Vaitheeswaran

Proceedings Volume 7013, 701328 (2008) https://doi.org/10.1117/12.790211

KEYWORDS: Mirrors, Interferometers, Telescopes, Cameras, Observatories, Infrared radiation, Imaging systems, Wavefront sensors, Ferroelectric materials, Infrared imaging

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Proceedings Article | 15 July 2008 Paper

Paper

LBTI software architecture

Vidhya Vaitheeswaran, Phil Hinz, Joseph Kraus, Andrew Breuninger

Proceedings Volume 7019, 70191K (2008) https://doi.org/10.1117/12.790265

KEYWORDS: Telescopes, Sensors, Mirrors, Computer architecture, Nulling interferometry, Adaptive optics, Interfaces, Cameras, Cryogenics, Safety

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Proceedings Article | 14 July 2008 Paper

Paper

PCR: a PC-based wave front reconstructor for MMT-AO

Vidhya Vaitheeswaran, Phil Hinz, Guido Brusa, Doug Miller, Thomas Stalcup

Proceedings Volume 7019, 70190E (2008) https://doi.org/10.1117/12.790249

KEYWORDS: Adaptive optics, Mirrors, Cameras, Wavefronts, Digital signal processing, Telescopes, Stars, Control systems, Interfaces, Wavefront sensors

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Proceedings Article | 24 September 2007 Paper

Paper

Astronomical imaging using ground-layer adaptive optics

Christoph Baranec, Michael Lloyd-Hart, N. Mark Milton, Thomas Stalcup, Miguel Snyder, Vidhya Vaitheeswaran, Don McCarthy, Roger Angel

Proceedings Volume 6691, 66910N (2007) https://doi.org/10.1117/12.732609

KEYWORDS: Adaptive optics, Wavefront sensors, Mirrors, Wavefronts, Stars, Laser guide stars, Telescopes, Cameras, Calibration, Monochromatic aberrations

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Showing 5 of 21 publications

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