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Near-infrared Spectroscopy of the Y0 WISEP J173835.52+273258.9 and the Y1 WISE J035000.32-565830.2: The Importance of Non-equilibrium Chemistry
Tremblin, P.; Saumon, D.; Morley, Caroline V. +5 more
We present new near-infrared spectra, obtained at Gemini Observatory, for two Y dwarfs: WISE J035000.32-565830.2 (W0350) and WISEP J173835.52+273258.9 (W1738). A FLAMINGOS-2 R = 540 spectrum was obtained for W0350, covering 1.0\lt λ µ {{m}} \lt 1.7, and a cross-dispersed Gemini near-infrared spectrograph R = 2800 spectrum was obtained for W1…
H-ATLAS/GAMA: the nature and characteristics of optically red galaxies detected at submillimetre wavelengths
Cooray, A.; Hony, S.; De Zotti, G. +39 more
We combine Herschel/SPIRE submillimetre (submm) observations with existing multiwavelength data to investigate the characteristics of low-redshift, optically red galaxies detected in submm bands. We select a sample of galaxies in the redshift range 0.01 ≤ z ≤ 0.2, having >5σ detections in the SPIRE 250 µm submm waveband. Sources are then …
Properties of Magnetic Tongues over a Solar Cycle
Démoulin, Pascal; Mandrini, Cristina H.; López Fuentes, Marcelo +1 more
The photospheric spatial distribution of the main magnetic polarities of bipolar active regions (ARs) present during their emergence deformations are known as magnetic tongues. They are attributed to the presence of twist in the toroidal magnetic-flux tubes that form the ARs. The aim of this article is to study the twist of newly emerged ARs from …
Population of post-nova supersoft X-ray sources
Gilfanov, Marat; Bildsten, Lars; Soraisam, Monika D. +1 more
Novae undergo a supersoft X-ray phase of varying duration after the optical outburst. Such transient post-nova supersoft X-ray sources (SSSs) are the majority of the observed SSSs in M31. In this paper, we use the post-nova evolutionary models of Wolf et al. to compute the expected population of post-nova SSSs in M31. We predict that depending on …
The clustering amplitude of X-ray-selected AGN at z ∼ 0.8: evidence for a negative dependence on accretion luminosity
Georgakakis, A.; Salvato, M.; Liu, Z. +5 more
The northern tile of the wide-area and shallow XMM-XXL X-ray survey field is used to estimate the average dark matter halo mass of relatively luminous X-ray-selected active galactic nucleus (AGN) [log {L}_X (2-10 keV)= 43.6^{+0.4}_{-0.4} erg s^{-1}] in the redshift interval z = 0.5-1.2. Spectroscopic follow-up observations of X-ray sources in the …
Radiative energy balance of Venus based on improved models of the middle and lower atmosphere
Kappel, D.; Drossart, P.; Piccioni, G. +4 more
The distribution of sources and sinks of radiative energy forces the atmospheric dynamics. The radiative transfer simulation model described by Haus et al. (2015b) is applied to calculate fluxes and temperature change rates in the middle and lower atmosphere of Venus (0-100 km) covering the energetic significant spectral range 0.125-1000 µm.…
Dynamics of the flares in the active polar region of Jupiter
Badman, S. V.; Bonfond, B.; Gérard, J. -C. +2 more
The duskside of the polar region of Jupiter's UV aurorae, called the active region, sometimes exhibits quasiperiodic (QP) flares on timescales of 2-3 min. Based on Hubble Space Telescope Far-UV time-tag images, we show for the first time that the Northern Hemisphere also displays QP flares. The area covered by these flares can reach up to 2.4 × 10…
[Fe II] jets from intermediate-mass protostars in Carina
Smith, Nathan; Bally, John; Reiter, Megan
We present new HST/WFC3-IR narrow-band [Fe II] images of protostellar jets in the Carina Nebula. Combined with five previously published sources, we have a sample of 18 jets and two Herbig-Haro (HH) objects. All of the jets we targeted with Wide-Field Camera 3 (WFC3) show bright infrared [Fe II] emission, and a few Hα candidate jets are confirmed …
Saturn's tropospheric particles phase function and spatial distribution from Cassini ISS 2010-11 observations
Irwin, Patrick G. J.; Sánchez-Lavega, Agustín; Pérez-Hoyos, Santiago +2 more
The phase function describes the way particles scatter the incoming radiation. This is a fundamental piece of knowledge in order to understand how a planetary atmosphere scatters sunlight and so it has a profound influence in the retrieved atmospheric properties such as cloud height, particle density distribution and radiative forcing by aerosols.…
The origin of seed photons for Comptonization in the black hole binary Swift J1753.5-0127
Tsygankov, S.; Neustroev, V.; Veledina, A. +1 more
Aims: The black hole binary Swift J1753.5-0127 is providing a unique data set to study accretion flows. Various investigations of this system and of other black holes have not, however, led to an agreement on the accretion flow geometry or on the seed photon source for Comptonization during different stages of X-ray outbursts. We place constr…