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4 results on '"Alycia J. Weinberger"'

1. Multiband GPI Imaging of the HR 4796A Debris Disk

Author

Alycia J. Weinberger, Robert J. De Rosa, Abhijith Rajan, Katherine B. Follette, Timothy J. Rodigas, Gael M. Roudier, Maxwell A. Millar-Blanchaer, Jessica A. Arnold, Paul Kalas, Kimberly Ward-Duong, Jason J. Wang, David J. Wilner, Zachary H. Draper, Glenn Schneider, Pascale Hibon, Elodie Choquet, Jeffrey Chilcote, Thomas M. Esposito, Schuyler Wolff, Franck Marchis, Juan Sebastián Bruzzone, Johan Mazoyer, Gaspard Duchêne, Pauline Arriaga, Marshall D. Perrin, Charles A. Poteet, Justin Hom, Bin Ren, Laurent Pueyo, Christine Chen, Rémi Soummer, Fredrik T. Rantakyrö, Dean C. Hines, Christopher C. Stark, Michael P. Fitzgerald, Vanessa P. Bailey, Jennifer Patience, Julien Milli, Brenda C. Matthews, Space Telescope Science Institute (STSci), Johns Hopkins University (JHU), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Department of Astronomy [Berkeley], University of California [Berkeley], University of California-University of California, Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Centre National d'Études Spatiales [Toulouse] (CNES)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ), Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA), Arizona State University [Tempe] (ASU), Department of Physics and Astronomy [UCLA, Los Angeles], University of California [Los Angeles] (UCLA), Caltech Department of Astronomy [Pasadena], California Institute of Technology (CALTECH), Carnegie Institution for Science [Washington], Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Physics and Astronomy Department, The University of Western Ontario (UWO), University of Western Ontario (UWO), Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), European Southern Observatory [Santiago] (ESO), European Southern Observatory (ESO), University of Victoria [Canada] (UVIC), Physics and Astronomy Department, Amherst College, Search for Extraterrestrial Intelligence Institute (SETI), Gemini Observatory [Southern Operations Center], Association of Universities for Research in Astronomy (AURA), Department of Terrestrial Magnetism [Carnegie Institution], Steward Observatory, University of Arizona, Harvard-Smithsonian Center for Astrophysics (CfA), Harvard University [Cambridge]-Smithsonian Institution, Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), University of California [Berkeley] (UC Berkeley), University of California (UC)-University of California (UC), Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France -Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France, Carnegie Institution for Science, Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), and Harvard University-Smithsonian Institution

Subjects
010504 meteorology & atmospheric sciences, [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], FOS: Physical sciences, 01 natural sciences, Measure (mathematics), symbols.namesake, Debris disks, 0103 physical sciences, Gemini Planet Imager, 010303 astronomy & astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), Astrophysics::Galaxy Astrophysics, 0105 earth and related environmental sciences, Earth and Planetary Astrophysics (astro-ph.EP), Physics, Debris disk, Scattering, [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], Astronomy and Astrophysics, Markov chain Monte Carlo, Function (mathematics), Circumstellar matter, Computational physics, Wavelength, Astrophysics - Solar and Stellar Astrophysics, 13. Climate action, Space and Planetary Science, symbols, SPHERES, Astrophysics::Earth and Planetary Astrophysics, Planetary system formation, Coronagraphic imaging, Astrophysics - Earth and Planetary Astrophysics
Abstract

We have obtained Gemini Planet Imager (GPI) J-, H-, K1-, and K2-Spec observations of the iconic debris ring around the young, main-sequence star HR 4796A. We applied several point-spread function (PSF) subtraction techniques to the observations (Mask-and-Interpolate, RDI-NMF, RDI-KLIP, and ADI-KLIP) to measure the geometric parameters and the scattering phase function for the disk. To understand the systematic errors associated with PSF subtraction, we also forward-modeled the observations using a Markov Chain Monte Carlo framework and a simple model for the disk. We found that measurements of the disk geometric parameters were robust, with all of our analyses yielding consistent results; however, measurements of the scattering phase function were challenging to reconstruct from PSF-subtracted images, despite extensive testing. As a result, we estimated the scattering phase function using disk modeling. We searched for a dependence of the scattering phase function with respect to the GPI filters but found none. We compared the H-band scattering phase function with that measured by Hubble Space Telescope STIS at visual wavelengths and discovered a blue color at small scattering angles and a red color at large scattering angles, consistent with predictions and laboratory measurements of large grains. Finally, we successfully modeled the SPHERE H2 HR 4796A scattered phase function using a distribution of hollow spheres composed of silicates, carbon, and metallic iron., 34 pages, 30 figures, accepted in ApJ

Published
2020

2. NULLING DATA REDUCTION AND ON-SKY PERFORMANCE OF THE LARGE BINOCULAR TELESCOPE INTERFEROMETER

Author

P. Arbo, John M. Hill, T. J. McMahon, Andras Gaspar, A. Vaz, O. Durney, Jarron Leisenring, K. Stapeldfeldt, Olivier Absil, Keith Powell, Philip M. Hinz, Alfio Puglisi, Denis Defrere, Lindsay Marion, William C. Danchi, P. Grenz, Christopher A. Haniff, Simone Esposito, M. Montoya, Alycia J. Weinberger, Vanessa P. Bailey, Eugene Serabyn, George H. Rieke, Andy Skemer, Bertrand Mennesson, E. Downey, R. Sosa, Guido Brusa, Geoffrey Bryden, Hop Bailey, Mark C. Wyatt, M. Nowak, Rafael Millan-Gabet, Aki Roberge, Enrico Pinna, Kate Y. L. Su, Grant M. Kennedy, W. F. Hoffmann, Eckhart Spalding, Space Sciences, Technologies and Astrophysics Research Institute (STAR), Université de Liège, University of Arizona, NASA ExoPlanet Science Institute (NExScI), California Institute of Technology (CALTECH), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Cavendish Laboratory, University of Cambridge [UK] (CAM), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Dipartimento di Fisica, Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome] (UNIROMA), Steward Observatory, GSFC Exoplanets and Stellar Astrophysics Laboratory, NASA Goddard Space Flight Center (GSFC), Haniff, Christopher [0000-0001-8726-5797], Kennedy, Grant [0000-0001-6831-7547], Wyatt, Mark [0000-0001-9064-5598], Apollo - University of Cambridge Repository, California Institute of Technology (CALTECH)-NASA, and Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome]

Subjects
media_common.quotation_subject, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, 7. Clean energy, circumstellar matter, 010309 optics, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, Nuller, Astrophysics::Galaxy Astrophysics, ComputingMilieux_MISCELLANEOUS, media_common, Earth and Planetary Astrophysics (astro-ph.EP), Physics, Wavefront, [PHYS]Physics [physics], zodiacal dust, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Astronomy and Astrophysics, Large Binocular Telescope, Planetary system, Stars, Interferometry, Space and Planetary Science, Sky, techniques: interferometric, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Data reduction, Astrophysics - Earth and Planetary Astrophysics
Abstract

The Large Binocular Telescope Interferometer (LBTI) is a versatile instrument designed for high-angular resolution and high-contrast infrared imaging (1.5-13 microns). In this paper, we focus on the mid-infrared (8-13 microns) nulling mode and present its theory of operation, data reduction, and on-sky performance as of the end of the commissioning phase in March 2015. With an interferometric baseline of 14.4 meters, the LBTI nuller is specifically tuned to resolve the habitable zone of nearby main-sequence stars, where warm exozodiacal dust emission peaks. Measuring the exozodi luminosity function of nearby main-sequence stars is a key milestone to prepare for future exoEarth direct imaging instruments. Thanks to recent progress in wavefront control and phase stabilization, as well as in data reduction techniques, the LBTI demonstrated in February 2015 a calibrated null accuracy of 0.05% over a three-hour long observing sequence on the bright nearby A3V star beta Leo. This is equivalent to an exozodiacal disk density of 15 to 30 zodi for a Sun-like star located at 10pc, depending on the adopted disk model. This result sets a new record for high-contrast mid-infrared interferometric imaging and opens a new window on the study of planetary systems., 17 pages, 18 figures (resubmitted to ApJ with referee's comments)

Published
2016

3. AN ENIGMATIC POINT-LIKE FEATURE WITHIN THE HD 169142 TRANSITIONAL DISK

Author

Thomas Henning, Katherine B. Follette, Timothy J. Rodigas, Beth Biller, Attila Juhasz, Sylvestre Lacour, Katie M. Morzinski, Rainer Köhler, Jared R. Males, Philip M. Hinz, Alycia J. Weinberger, Laird M. Close, Mickael Bonnefoy, Jörg-Uwe Pott, Aurora Sicilia-Aguilar, Myriam Benisty, Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, Kavli Institute for Particle Astrophysics and Cosmology (KIPAC), Stanford University, Institut de Planétologie et d'Astrophysique de Grenoble (IPAG ), Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), INAF - Osservatorio Astrofisico di Arcetri (OAA), Istituto Nazionale di Astrofisica (INAF), and University of St Andrews. School of Physics and Astronomy

Subjects
Protoplanetary disks, Brightness, astro-ph.SR, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Planet, 0103 physical sciences, QB Astronomy, 10. No inequality, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), QC, ComputingMilieux_MISCELLANEOUS, QB, Physics, Earth and Planetary Astrophysics (astro-ph.EP), [PHYS]Physics [physics], Debris disk, Photosphere, 010308 nuclear & particles physics, Astronomy and Astrophysics, Position angle, Stars, detection [Planets and satellites], gaseous planets [Planets and satellites], QC Physics, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, Feature (computer vision), astro-ph.EP, Astrophysics::Earth and Planetary Astrophysics, Protoplanet, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], formation [Planets and satellites], Astrophysics - Earth and Planetary Astrophysics
Abstract

We report the detection of a faint pointlike feature possibly related to ongoing planet-formation in the disk of the transition disk star HD 169142. The pointlike feature has a $\Delta$mag(L)$\sim$6.4, at a separation of $\sim$0.11" and PA$\sim$0$^{\circ}$. Given its lack of an H or K$_{S}$ counterpart despite its relative brightness, this candidate cannot be explained by purely photospheric emission and must be a disk feature heated by an as yet unknown source. Its extremely red colors make it highly unlikely to be a background object, but future multi-wavelength followup is necessary for confirmation and characterization of this feature., Comment: Accepted to ApJ Letters, see also Reggiani et al. 2014

Published
2014

4. An Infrared Coronagraphic Survey for Substellar Companions

Author

P. Plait, S. R. Heap, Richard J. Terrile, Jean-Luc Beuzit, Eliot M. Malumuth, Christophe Dumas, Alycia J. Weinberger, Barry Zuckerman, Eric E. Becklin, Glenn Schneider, J. Davy Kirkpatrick, Patrick Lowrance, Dean C. Hines, Laboratoire d'Astrophysique de Grenoble (LAOG), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Proper motion, Infrared, Brown dwarf, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, law.invention, law, Planet, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, Coronagraph, Astrophysics::Galaxy Astrophysics, Physics, Spectrometer, 010308 nuclear & particles physics, Astrophysics (astro-ph), Astronomy and Astrophysics, Stars, 13. Climate action, Space and Planetary Science, Astrophysics::Earth and Planetary Astrophysics, Jupiter mass
Abstract

We have used the F160W filter (1.4-1.8 um) and the coronagraph on the Near-InfraRed Camera and Multi-Object Spectrometer (NICMOS) on the Hubble Space Telescope (HST) to survey 45 single stars with a median age of 0.15 Gyr, an average distance of 30 pc, and an average H-magnitude of 7 mag. For the median age we were capable of detecting a 30 M_Jup companion at separations between 15 and 200 AU. A 5 M_Jup object could have been detected at 30 AU around 36% of our primaries. For several of our targets that were less than 30 Myr old, the lower mass limit was as low as a Jupiter mass, well into the high mass planet region. Results of the entire survey include the proper motion verification of five low-mass stellar companions, two brown dwarfs (HR7329B and TWA5B) and one possible brown dwarf binary (Gl 577B/C)., 11 figures, accepted by AJ

Published
2005

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