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HATS-37Ab and HATS-38b: Two Transiting Hot Neptunes in the Desert
Butler, R. P.; Henning, Th.; Mancini, L. +24 more
We report the discovery of two transiting Neptunes by the HATSouth survey. The planet HATS-37Ab has a mass of $0.099\pm 0.042$ ${M}_{{\rm{J}}}$ (31.5 ± 13.4 M⊕) and a radius of $0.606\pm 0.016$ ${R}_{{\rm{J}}}$ , and is on a $P=4.3315$ day orbit around a $V=12.266\pm 0.030$ mag, ${0.843}_{-0.012}^{+0.017}$ ${M}_{\odot }$ star with a rad…
Magnetic Reconnection Invoked by Sweeping of the CME-driven Fast-mode Shock
Lin, Jun; Wang, Jingxiu; Zhang, Yuzong +4 more
Coronal waves exist ubiquitously in the solar atmosphere. They are important not only because of their rich physics but also because they are essential candidates for triggering remote magnetic eruptions. However, the latter mechanism has never been directly confirmed. By revisiting the successive eruptions on 2012 March 7, fast-mode shocks are id…
Seasonal evolution of temperatures in Titan's lower stratosphere
Irwin, P. G. J.; Teanby, N. A.; Bézard, B. +4 more
The Cassini mission offered us the opportunity to monitor the seasonal evolution of Titan's atmosphere from 2004 to 2017, i.e. half a Titan year. The lower part of the stratosphere (pressures greater than 10 mbar) is a region of particular interest as there are few available temperature measurements, and because its thermal response to the seasona…
Optical and Infrared Study of the Obscured B[e] Supergiant High-mass X-Ray Binary IGR J16318-4848
Chaty, Sylvain; Fortin, Francis; Sander, Andreas
The supergiant high-mass X-ray binary IGR J16318-4848 was the first source detected by the INTErnational Gamma-Ray Astrophysics Laboratory satellite in 2003 and distinguishes itself by its high intrinsic absorption and B[e] phenomenon. It is the perfect candidate to study both binary interaction and the environment of supergiant B[e] stars. This s…
A Systematic Study of Galactic Outflows via Fluorescence Emission: Implications for Their Size and Structure
Heckman, Timothy M.; Wang, Bingjie; Norman, Colin A. +1 more
Galactic outflows play a major role in the evolution of galaxies, but the underlying physical processes are poorly understood. This is mainly because we have little information about the outflow structure, especially on large scales. In this paper, we probe the structure of galactic outflows in low-z starbursts using a combination of ultraviolet s…
Estimating black hole masses: Accretion disk fitting versus reverberation mapping and single epoch
Celotti, Annalisa; Ghisellini, Gabriele; Sbarrato, Tullia +1 more
We selected a sample of 28 Type 1 active galactic nuclei for which a black hole mass has been inferred using the reverberation mapping technique and single epoch scaling relations. All 28 sources show clear evidence of the "Big Blue Bump" in the optical-UV band whose emission is produced by an accretion disk (AD) around a supermassive black hole. …
High-contrast Thermal Infrared Spectroscopy with ALES: The 3-4 µm Spectrum of κ Andromedae b
Spalding, Eckhart; Barman, Travis; Woodward, Charles E. +7 more
We present the first L-band (2.8-4.1 µm) spectroscopy of κ Andromedae b, a ∼20 MJup companion orbiting at 1″ projected separation from its B9-type stellar host. We combine our Large Binocular Telescope (LBT) Arizona Lenslets for Exoplanet Spectroscopy (ALES) integral field spectrograph data with measurements from other instruments…
Very long baseline interferometry imaging of the advancing ejecta in the first gamma-ray nova V407 Cygni
Munari, U.; Cheung, C. C.; Giroletti, M. +7 more
Context. In 2010 March, the Large Area Telescope on board Fermi revealed a transient gamma-ray source that is positionally coincident with the optical nova in the symbiotic binary, V407 Cyg. This event marked the first discovery of gamma-ray emission from a nova.
Aims: We aim to obtain resolved radio imaging of the material involved in the no…
The OTELO survey. Nature and mass-metallicity relation for Hα emitters at z ∼ 0.4
Gallego, Jesús; Sánchez-Portal, Miguel; Pintos-Castro, Irene +14 more
Context. A sample of low-mass Hα emission line sources at z ∼ 0.4 was studied in the context of the mass-metallicty relation (MZR) and its possible evolution. We drew our sample from the OSIRIS Tunable Emission Line Object (OTELO) survey, which exploits the red tunable filter of OSIRIS at the Gran Telescopio Canarias to perform a blind narrow-band…
Orbits and resonances of the regular moons of Neptune
de Pater, Imke; Showalter, Mark R.; Lissauer, Jack J. +3 more
We report integrated orbital fits for the inner regular moons of Neptune based on the most complete astrometric data set to date, with observations from Earth-based telescopes, Voyager 2, and the Hubble Space Telescope covering 1981-2016. We summarize the results in terms of state vectors, mean orbital elements, and orbital uncertainties. The esti…