Showing 2015 · astro-ph.EPShow all

24 papers · 2 filters

astro-ph.EP2015★ 21 cited

2D photochemical modeling of Saturn's stratosphere. Part II: Feedback between composition and temperature

V. Hue, T. K. Greathouse, T. Cavalié +2

Saturn's axial tilt produces seasons in a similar way as on Earth. Both the stratospheric temperature and composition are affected by this latitudinally varying insolation along th…

astro-ph.EP2015★ 197 cited

New constraints on Saturn's interior from Cassini astrometric data

Valéry Lainey, Robert A. Jacobson, Radwan Tajeddine +15

Using astrometric observations spanning more than a century and including a large set of Cassini data, we determine Saturn's tidal parameters through their current effects on the o…

astro-ph.EP2015

Ethyl alcohol and sugar in comet C/2014Q2 (Lovejoy)

Nicolas Biver, Dominique Bockelée-Morvan, Raphaël Moreno +7

The presence of numerous complex organic molecules (COMs; defined as those containing six or more atoms) around protostars shows that star formation is accompanied by an increase o…

astro-ph.EP2015

Confirmation of the Planetary Microlensing Signal and Star and Planet Mass Determinations for Event OGLE-2005-BLG-169

D. P. Bennett, A. Bhattacharya, J. Anderson +15

We present Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) observations of the source and lens stars for planetary microlensing event OGLE-2005-BLG-169, which confirm the r…

astro-ph.EP2015★ 54 cited

The composition of the protosolar disk and the formation conditions for comets

K. Willacy, C. Alexander, M. Ali-Dib +12

Conditions in the protosolar nebula have left their mark in the composition of cometary volatiles, thought to be some of the most pristine material in the solar system. Cometary co…

astro-ph.EP2015★ 84 cited

The SOPHIE search for northern extrasolar planets VIII. A warm Neptune orbiting HD164595

B. Courcol, F. Bouchy, F. Pepe +23

High-precision radial velocity surveys explore the population of low-mass exoplanets orbiting bright stars. This allows accurately deriving their orbital parameters such as their o…

astro-ph.EP2015★ 7 cited

Astrometric observations of Phobos and Deimos during the 1971 opposition of Mars

V. Robert, V. Lainey, D. Pascu +4

Accurate positional measurements of planets and satellites are used to improve our knowledge of their dynamics and to infer the accuracy of planet and satellite ephemerides. In the…

astro-ph.EP2015★ 530 cited

A giant comet-like cloud of hydrogen escaping the warm Neptune-mass exoplanet GJ 436b

David Ehrenreich, Vincent Bourrier, Peter J. Wheatley +8

Exoplanets orbiting close to their parent stars could lose some fraction of their atmospheres because of the extreme irradiation. Atmospheric mass loss primarily affects low-mass e…

astro-ph.EP2015★ 69 cited

The orbital evolution of asteroids, pebbles and planets from giant branch stellar radiation and winds

Dimitri Veras, Siegfried Eggl, Boris T. Gaensicke

The discovery of over 50 planets around evolved stars and more than 35 debris discs orbiting white dwarfs highlight the increasing need to understand small body evolution around bo…

astro-ph.EP2015★ 61 cited

Discovery of Seven Companions to Intermediate Mass Stars with Extreme Mass Ratios in the Scorpius-Centaurus Association

Sasha Hinkley, Adam L. Kraus, Michael J. Ireland +6

We report the detection of seven low mass companions to intermediate-mass stars (SpT B/A/F; 1.5-4.5 solar masses) in the Scorpius-Centaurus Association using nonredunda…

astro-ph.EP2015★ 12 cited

Results of two multi-chord stellar occultations by dwarf planet (1) Ceres

A. R. Gomes-Júnior, B. L. Giacchini, F. Braga-Ribas +24

We report the results of two multi-chord stellar occultations by the dwarf planet (1) Ceres that were observed from Brazil on 2010 August 17, and from the USA on 2013 October 25. F…

astro-ph.EP2015★ 59 cited

Methane storms as a driver of Titan's dune orientation

Benjamin Charnay, Erika Barth, Scot Rafkin +5

Titan's equatorial regions are covered by eastward propagating linear dunes. This direction is opposite to mean surface winds simulated by Global Climate Models (GCMs), which are o…

astro-ph.EP2015★ 18 cited

Transiting exoplanets from the CoRoT space mission XXVII. CoRoT-28b, a planet orbiting an evolved star, and CoRoT-29b, a planet showing an asymmetric transit

J. Cabrera, Sz. Csizmadia, G. Montagnier +50

Context. We present the discovery of two transiting extrasolar planets by the satellite CoRoT. Aims. We aim at a characterization of the planetary bulk parameters, which allow us t…

astro-ph.EP2015★ 23 cited

Growth of calcium-aluminum-rich inclusions by coagulation and fragmentation in a turbulent protoplanetary disk: observations and modelisation

S. Charnoz, J. Aleon, N. Chaumard +2

Whereas it is generally accepted that calcium-aluminum-rich inclusions (CAIs) from chondritic meteorites formed in a hot environment in the solar protoplanetary disk, the condition…

astro-ph.EP2015★ 42 cited

GTC OSIRIS transiting exoplanet atmospheric survey: detection of potassium in HAT-P-1b from narrowband spectrophotometry

P. A. Wilson, D. K Sing, N. Nikolov +7

We present the detection of potassium in the atmosphere of HAT-P-1b using optical transit narrowband photometry. The results are obtained using the 10.4 m Gran Telescopio Canarias…

astro-ph.EP2015★ 144 cited

Classification of magnetized star--planet interactions: bow shocks, tails, and inspiraling flows

Titos Matsakos, Ana Uribe, Arieh Königl

Close-in exoplanets interact with their host stars gravitationally as well as via their magnetized plasma outflows. The rich dynamics that arises may result in distinct observable…

astro-ph.EP2015★ 67 cited

Re-visit of HST FUV observations of hot-Jupiter system HD 209458: No Si III detection and the need for COS transit observations

G. E. Ballester, L. Ben-Jaffel

The discovery of OI atoms and CII ions in the upper atmosphere of HD 209458b, made with the Hubble Space Telescope Imaging Spectrograph (STIS) using the G140L grating, showed that…

astro-ph.EP2015★ 5 cited

Reanalyses of Anomalous Gravitational Microlensing Events in the OGLE-III Early Warning System Database with Combined Data

J. Jeong, H. Park, C. Han +95

We reanalyze microlensing events in the published list of anomalous events that were observed from the OGLE lensing survey conducted during 2004-2008 period. In order to check the…

astro-ph.EP2015★ 40 cited

Detection and characterization of Io's atmosphere from high-resolution 4-μm spectroscopy

E. Lellouch, M. Ali-Dib, K. -L. Jessup +3

We report on high-resolution and spatially-resolved spectra of Io in the 4.0 μm region, recorded with the VLT/CRIRES instrument in 2008 and 2010, which provide the first detection…

astro-ph.EP2015★ 17 cited

The non-convex shape of (234) Barbara, the first Barbarian

P. Tanga, B. Carry, F. Colas +37

Asteroid (234) Barbara is the prototype of a category of asteroids that has been shown to be extremely rich in refractory inclusions, the oldest material ever found in the Solar Sy…

astro-ph.EP2015★ 70 cited

Micron-scale D/H heterogeneity in chondrite matrices: a signature of the pristine solar system water?

Laurette Piani, François Robert, Laurent Remusat

Organic matter and hydrous silicates are intimately mixed in the matrix of chondrites and in-situ determination of their individual D/H ratios is therefore challenging. Nevertheles…

astro-ph.EP2015★ 38 cited

Structure, composition, and location of organic matter in the enstatite chondrite Sahara 97096 (EH3)

Laurette Piani, FrançOis Robert, Olivier Beyssac +8

The insoluble organic matter (IOM) of an unequilibrated enstatite chondrite Sahara (SAH) 97096 has been investigated using a battery of analytical techniques. As the enstatite chon…

astro-ph.EP2015★ 16 cited

Short-term variability on the surface of (1) Ceres. A changing amount of water ice?

D. Perna, Z. Kaňuchová, S. Ieva +5

Context: The dwarf planet (1) Ceres - next target of the NASA Dawn mission - is the largest body in the asteroid main belt; although several observations of this body have been per…

astro-ph.EP2015★ 85 cited

The formation of the solar system

S. Pfalzner, M. B. Davies, M. Gounelle +7

The solar system started to form about 4.56 Gyr ago and despite the long intervening time span, there still exist several clues about its formation. The three major sources for thi…