Search Results - "Oza, Apurva V"
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Sodium and Potassium Signatures of Volcanic Satellites Orbiting Close-in Gas Giant Exoplanets
Published in The Astrophysical journal (10-11-2019)“…Extrasolar satellites are generally too small to be detected by nominal searches. By analogy to the most active body in the solar system, Io, we describe how…”
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2
Tidal pull of the Earth strips the proto-Moon of its volatiles
Published in Icarus (New York, N.Y. 1962) (01-08-2021)“…Prevailing models for the formation of the Moon invoke a giant impact between a planetary embryo and the proto-Earth (Canup, 2004; Ćuk et al., 2016). Despite…”
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Radio-loud Exoplanet-exomoon Survey: GMRT Search for Electron Cyclotron Maser Emission
Published in The Astronomical journal (01-01-2023)“…Abstract We conducted the first dedicated search for signatures of exoplanet–exomoon interactions using the Giant Metrewave Radio Telescope (GMRT) as part of…”
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4
Redshifted Sodium Transient near Exoplanet Transit
Published in Astrophysical journal. Letters (01-10-2024)“…Abstract Neutral sodium (Na i ) is an alkali metal with a favorable absorption cross section such that tenuous gases are easily illuminated at select…”
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Debris Disks Can Contaminate Mid-infrared Exoplanet Spectra: Evidence for a Circumstellar Debris Disk around Exoplanet Host WASP-39
Published in Astrophysical journal. Letters (01-07-2024)“…Abstract The signal from a transiting planet can be diluted by astrophysical contamination. In the case of circumstellar debris disks, this contamination could…”
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Alkaline exospheres of exoplanet systems: evaporative transmission spectra
Published in Monthly notices of the Royal Astronomical Society (01-10-2020)“…ABSTRACT Hydrostatic equilibrium is an excellent approximation for the dense layers of planetary atmospheres, where it has been canonically used to interpret…”
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7
Downward Oxidant Transport Through Europa's Ice Shell by Density‐Driven Brine Percolation
Published in Geophysical research letters (16-03-2022)“…Jupiter's moon Europa is thought to have an ocean beneath its ice shell and the habitability of the internal ocean depends on the availability of redox…”
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uGMRT observations of the hot-Saturn WASP-69b: Radio-Loud Exoplanet–Exomoon Survey II (RLEES II)
Published in Monthly notices of the Royal Astronomical Society (21-04-2023)“…ABSTRACT Exomoons have so far eluded ongoing searches. Several studies have exploited transit and transit timing variations and high-resolution spectroscopy to…”
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9
A secondary atmosphere on the rocky exoplanet 55 Cancri e
Published in Nature (London) (20-06-2024)“…Characterizing rocky exoplanets is a central aim of astronomy, and yet the search for atmospheres on rocky exoplanets has so far resulted in either tight upper…”
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10
Callisto's Atmosphere: First Evidence for H2 and Constraints on H2O
Published in Journal of geophysical research. Planets (01-11-2022)“…We explore the parameter space for the contribution to Callisto's H corona observed by the Hubble Space Telescope from sublimated H2O and radiolytically…”
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11
Common origin of trapped volatiles in oxidized icy moons and comets
Published in Icarus (New York, N.Y. 1962) (15-03-2024)“…Following spacecraft encounters with comets 67P/C-G and 1P/Halley, it was surprising that O2, expected to be a very minor species in their comas, was observed…”
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12
Dusk/dawn atmospheric asymmetries on tidally-locked satellites: O2 at Europa
Published in Icarus (New York, N.Y. 1962) (01-05-2018)“…•A 1-D analytical model is presented to examine dusk/dawn asymmetries in tidally-locked satellites.•The atmospheric shift towards dusk for a…”
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13
Low-resolution transit spectroscopy of three hot Jupiters using the 2 m Himalayan Chandra Telescope
Published in Monthly notices of the Royal Astronomical Society (05-11-2024)“…ABSTRACT Here, we present the low-resolution transmission spectroscopy of three giant planets using the Himalayan Faint Object Spectrograph Camera (HFOSC) on…”
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14
Sulfur dioxide in the mid-infrared transmission spectrum of WASP-39b
Published in Nature (London) (29-02-2024)“…The recent inference of sulfur dioxide (SO 2 ) in the atmosphere of the hot (approximately 1,100 K), Saturn-mass exoplanet WASP-39b from near-infrared JWST…”
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15
VOLATILE LOSS AND CLASSIFICATION OF KUIPER BELT OBJECTS
Published in The Astrophysical journal (10-08-2015)“…ABSTRACT Observations indicate that some of the largest Kuiper Belt Objects (KBOs) have retained volatiles in the gas phase (e.g., Pluto), while others have…”
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Callisto's Atmosphere: First Evidence for H-2 and Constraints on H2O
Published in Journal of geophysical research. Planets (01-11-2022)“…We explore the parameter space for the contribution to Callisto's H corona observed by the Hubble Space Telescope from sublimated H2O and radiolytically…”
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17
Dusk over dawn O2 asymmetry in Europa's near-surface atmosphere
Published in Planetary and space science (01-03-2019)“…The evolution of Europa's water-product exosphere over its 85-h day, based on current models, has not been shown to exhibit any diurnal asymmetries. Here we…”
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18
Evolution of Mercury’s Earliest Atmosphere
Published in The planetary science journal (01-12-2021)“…Abstract MESSENGER observations suggest a magma ocean formed on proto-Mercury, during which evaporation of metals and outgassing of C- and H-bearing volatiles…”
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Callisto's Atmosphere: First Evidence for H 2 and Constraints on H 2 O
Published in Journal of geophysical research. Planets (01-11-2022)“…Abstract We explore the parameter space for the contribution to Callisto's H corona observed by the Hubble Space Telescope from sublimated H 2 O and…”
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20
Alkaline Exospheres of Exoplanet Systems: Evaporative Transmission Spectra
Published 10-08-2020“…Hydrostatic equilibrium is an excellent approximation for the dense layers of planetary atmospheres where it has been canonically used to interpret…”
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