Search Results - "METCHEV, STANIMIR"

WEATHER ON OTHER WORLDS. II. SURVEY RESULTS: SPOTS ARE UBIQUITOUS ON L AND T DWARFS by Metchev, Stanimir A, Heinze, Aren, Apai, Daniel, Flateau, Davin, Radigan, Jacqueline, Burgasser, Adam, Marley, Mark S, Artigau, Etienne, Plavchan, Peter, Goldman, Bertrand

“…(ProQuest: ... denotes formulae and/or non-USASCII text omitted) We present results from the Weather on Other Worlds Spitzer Exploration Science program to…”
Get full text

The photometric periods of rapidly rotating field ultra-cool dwarfs by Miles-Páez, Paulo A, Metchev, Stanimir A, George, Benjamin

“…ABSTRACT We use 1-m-class telescopes and the Transiting Exoplanet Survey Satellite (TESS) to explore the photometric variability of all known rapidly rotating…”
Get full text

Ultracool Dwarfs Observed with the Spitzer Infrared Spectrograph: Equatorial Latitudes in L Dwarf Atmospheres Are Cloudier by Suárez, Genaro, Vos, Johanna M., Metchev, Stanimir, Faherty, Jacqueline K., Cruz, Kelle

“…Abstract We report direct observational evidence for a latitudinal dependence of dust cloud opacity in ultracool dwarfs, indicating that equatorial latitudes…”
Get full text

EXTRASOLAR STORMS: PRESSURE-DEPENDENT CHANGES IN LIGHT-CURVE PHASE IN BROWN DWARFS FROM SIMULTANEOUS HST AND SPITZER OBSERVATIONS by Yang, Hao, Apai, Dániel, Marley, Mark S., Karalidi, Theodora, Flateau, Davin, Showman, Adam P., Metchev, Stanimir, Buenzli, Esther, Radigan, Jacqueline, Artigau, Étienne, Lowrance, Patrick J., Burgasser, Adam J.

“…ABSTRACT We present Spitzer/Infrared Array Camera Ch1 and Ch2 monitoring of six brown dwarfs during eight different epochs over the course of 20 months. For…”
Get full text

Weather on Other Worlds. IV. Hα Emission and Photometric Variability Are Not Correlated in L0–T8 Dwarfs by Miles-Páez, Paulo A., Metchev, Stanimir A., Heinze, Aren, Apai, Dániel

“…Abstract Recent photometric studies have revealed that surface spots that produce flux variations are present on virtually all L and T dwarfs. Their likely…”
Get full text

A Cross-Match of 2MASS and SDSS: Newly Found L and T Dwarfs and an Estimate of the Space Density of T Dwarfs by Metchev, Stanimir A, Kirkpatrick, J. Davy, Berriman, G. Bruce, Looper, Dagny

“…We report new L and T dwarfs found in a cross-match of the SDSS Data Release 1 and 2MASS. Our simultaneous search of the two databases effectively allows us to…”
Get full text

HD 203030B: An Unusually Cool Young Substellar Companion near the L/T Transition by Metchev, Stanimir A, Hillenbrand, Lynne A

“…We present the discovery of a brown dwarf companion to the star HD 203030: a G8 V Solar analog with an estimated age between 130 and 400 Myr old G8 V…”
Get full text

The colibri telescope array for KBO detection through serendipitous stellar occultations: A technical description by Mazur, Michael J., Metchev, Stanimir, Brown, Rachel A., Gupta, Ridhee, Bloch, Richard, Mills, Tristan, Pass, Emily

“…We present the technical design, construction and testing of the Colibri telescope array at Elginfield Observatory near London, Ontario, Canada. Three 50-cm…”
Get full text

Initial Results from the Palomar Adaptive Optics Survey of Young Solar-Type Stars: A Brown Dwarf and Three Stellar Companions by Metchev, Stanimir A, Hillenbrand, Lynne A

“…We present first results from the Palomar Adaptive Optics Survey of Young Stars conducted at the Hale 5 m telescope. Through direct imaging we have discovered…”
Get full text

The Moth: An Unusual Circumstellar Structure Associated with HD 61005 by Hines, Dean C, Schneider, Glenn, Hollenbach, David, Mamajek, Eric E, Hillenbrand, Lynne A, Metchev, Stanimir A, Meyer, Michael R, Carpenter, John M, Moro-Martín, Amaya, Silverstone, Murray D, Kim, Jinyoung Serena, Henning, Thomas, Bouwman, Jeroen, Wolf, Sebastian

“…We present the discovery of an unusual spatially resolved circumstellar structure associated with the approximately 90 Myr, nearby, G dwarf star HD 61005…”
Get full text

A SUBSTELLAR COMMON PROPER-MOTION COMPANION TO THE PLEIAD H II 1348 by GEISSLER, Kerstin, METCHEV, Stanimir A, PHAM, Alfonse, LARKIN, James E, MCELWAIN, Michael, HILLENBRAND, Lynne A

“…We announce the identification of a proper-motion companion to the star H II 1348, a K5 V member of the Pleiades open cluster. The existence of a faint point…”
Get full text

Ten Micron Observations of Nearby Young Stars by Metchev, Stanimir A, Hillenbrand, Lynne A, Meyer, Michael R

“…We present new 10 mu m photometry of 21 nearby young stars obtained at the Palomar 5 m and at the Keck I 10 m telescopes as part of a program to search for…”
Get full text

Adaptive Optics Imaging of the AU Microscopii Circumstellar Disk: Evidence for Dynamical Evolution by Metchev, Stanimir A, Eisner, Joshua A, Hillenbrand, Lynne A, Wolf, Sebastian

“…We present an H-band image of the light scattered from circumstellar dust around the nearby (10 pc) young M star AU Microscopii (AU Mic, GJ 803, HD 197481),…”
Get full text

First High-Contrast Science with an Integral Field Spectrograph: The Substellar Companion to GQ Lupi by McElwain, Michael W, Metchev, Stanimir A, Larkin, James E, Barczys, Matthew, Iserlohe, Christof, Krabbe, Alfred, Quirrenbach, Andreas, Weiss, Jason, Wright, Shelley A

“…We present commissioning data from the OSIRIS integral field spectrograph (IFS) on the Keck II 10 m telescope that demonstrate the utility of adaptive optics…”
Get full text

Ultracool dwarfs observed with the Spitzer infrared spectrograph – II. Emergence and sedimentation of silicate clouds in L dwarfs, and analysis of the full M5–T9 field dwarf spectroscopic sample by Suárez, Genaro, Metchev, Stanimir

“…ABSTRACT We present a uniform analysis of all mid-infrared R ≈ 90 spectra of field M5–T9 dwarfs obtained with the Spitzer Infrared Spectrograph (IRS). The…”
Get full text

Ultracool dwarfs observed with the Spitzer Infrared Spectrograph – III. Dust grains in young L dwarf atmospheres are heavier by Suárez, Genaro, Metchev, Stanimir

“…ABSTRACT Analysis of all archival 5–14 micron spectra of field ultracool dwarfs from the Infrared Spectrograph on the Spitzer Space Telescope has shown that…”
Get full text

Adaptive Optics Observations of Vega: Eight Detected Sources and Upper Limits to Planetary-Mass Companions by Metchev, Stanimir A, Hillenbrand, Lynne A, White, Russel J

Get full text

Let the Great World Spin: Revealing the Stormy, Turbulent Nature of Young Giant Exoplanet Analogs with the Spitzer Space Telescope by Vos, Johanna M., Faherty, Jacqueline K., Gagné, Jonathan, Marley, Mark, Metchev, Stanimir, Gizis, John, Rice, Emily L., Cruz, Kelle

“…Abstract We present a survey for photometric variability in young, low-mass brown dwarfs with the Spitzer Space Telescope. The 23 objects in our sample show…”
Get full text

Weather on Other Worlds. VI. Optical Spectrophotometry of Luhman 16B Reveals Large-amplitude Variations in the Alkali Lines by Heinze, A. N., Metchev, Stanimir, Kurtev, Radostin, Gillon, Michael

“…Abstract Using a novel wide-slit, multiobject approach with the GMOS spectrograph on the 8 m Gemini South telescope, we have obtained precise time-series…”
Get full text

WEATHER ON OTHER WORLDS. III. A SURVEY FOR T DWARFS WITH HIGH-AMPLITUDE OPTICAL VARIABILITY by Heinze, Aren N, Metchev, Stanimir, Kellogg, Kendra

“…We have monitored 12 T dwarfs with the Kitt Peak 2.1 m telescope using an F814W filter (0.7-0.95 mu m) to place in context the remarkable 10%-20% variability…”
Get full text