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HST Hot-Jupiter Transmission Spectral Survey: Clear Skies for Cool Saturn WASP-39b
Deming, Drake; Nikolov, Nikolay; Fortney, Jonathan J. +13 more
We present the Hubble Space Telescope (HST) Space Telescope Imaging Spectrograph (STIS) optical transmission spectroscopy of the cool Saturn-mass exoplanet WASP-39b from 0.29-1.025 µm, along with complementary transit observations from Spitzer IRAC at 3.6 and 4.5 µm. The low density and large atmospheric pressure scale height of WASP-3…
The Major Geoeffective Solar Eruptions of 2012 March 7: Comprehensive Sun-to-Earth Analysis
Gontikakis, C.; Patsourakos, S.; Tsinganos, K. +33 more
During the interval 2012 March 7-11 the geospace experienced a barrage of intense space weather phenomena including the second largest geomagnetic storm of solar cycle 24 so far. Significant ultra-low-frequency wave enhancements and relativistic-electron dropouts in the radiation belts, as well as strong energetic-electron injection events in the …
The Evolution of the Intracluster Medium Metallicity in Sunyaev Zel’dovich-selected Galaxy Clusters at 0 < z < 1.5
Hlavacek-Larrondo, J.; Bleem, L. E.; Stalder, B. +16 more
We present the results of an X-ray spectral analysis of 153 galaxy clusters observed with the Chandra, XMM-Newton, and Suzaku space telescopes. These clusters, which span 0 < z < 1.5, were drawn from a larger, mass-selected sample of galaxy clusters discovered in the 2500 square degree South Pole Telescope Sunyaev Zel’dovich (SPT-SZ) survey.…
The Relationship Between Molecular Gas, H I, and Star Formation in the Low-mass, Low-metallicity Magellanic Clouds
Bot, Caroline; Bolatto, Alberto D.; Leroy, Adam K. +14 more
The Magellanic Clouds provide the only laboratory to study the effects of metallicity and galaxy mass on molecular gas and star formation at high (∼⃒20 pc) resolution. We use the dust emission from HERITAGE Herschel data to map the molecular gas in the Magellanic Clouds, avoiding the known biases of CO emission as a tracer of {{{H}}}2. U…
Incidence of debris discs around FGK stars in the solar neighbourhood
Heras, A. M.; Fridlund, M.; Krivov, A. V. +16 more
Context. Debris discs are a consequence of the planet formation process and constitute the fingerprints of planetesimal systems. Their counterparts in the solar system are the asteroid and Edgeworth-Kuiper belts.
Aims: The aim of this paper is to provide robust numbers for the incidence of debris discs around FGK stars in the solar neighbourh…
Subproton-scale Cascades in Solar Wind Turbulence: Driven Hybrid-kinetic Simulations
Rincon, F.; Califano, F.; Cerri, S. S. +2 more
A long-lasting debate in space plasma physics concerns the nature of subproton-scale fluctuations in solar wind (SW) turbulence. Over the past decade, a series of theoretical and observational studies were presented in favor of either kinetic Alfvén wave (KAW) or whistler turbulence. Here, we investigate numerically the nature of the subproton-sca…
Bayesian model selection without evidences: application to the dark energy equation-of-state
Hobson, M. P.; Lasenby, A. N.; Hee, S. +1 more
A method is presented for Bayesian model selection without explicitly computing evidences, by using a combined likelihood and introducing an integer model selection parameter n so that Bayes factors, or more generally posterior odds ratios, may be read off directly from the posterior of n. If the total number of models under consideration is speci…
Cosmology and the neutrino mass ordering
Hannestad, Steen; Schwetz, Thomas
We propose a simple method to quantify a possible exclusion of the inverted neutrino mass ordering from cosmological bounds on the sum of the neutrino masses. The method is based on Bayesian inference and allows for a calculation of the posterior odds of normal versus inverted ordering. We apply the method for a specific set of current data from P…
Solar energetic particle access to distant longitudes through turbulent field-line meandering
Laitinen, T.; Dalla, S.; Kopp, A. +2 more
Context. Current solar energetic particle (SEP) propagation models describe the effects of interplanetary plasma turbulence on SEPs as diffusion, using a Fokker-Planck (FP) equation. However, FP models cannot explain the observed fast access of SEPs across the average magnetic field to regions that are widely separated in longitude within the heli…
The Lyman Continuum Escape Fraction of the Cosmic Horseshoe: A Test of Indirect Estimates
Lewis, Geraint F.; Pettini, Max; Siana, Brian +6 more
High-redshift star-forming galaxies are likely responsible for the reionization of the universe, yet direct detection of their escaping ionizing (Lyman continuum [LyC]) photons has proven to be extremely challenging. In this study, we search for escaping LyC of the Cosmic Horseshoe, a gravitationally lensed, star-forming galaxy at z = 2.38 with a …