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The Smallest Scale of Hierarchy survey (SSH) - I. Survey description
Cignoni, M.; Tosi, M.; Bellazzini, M. +7 more
The Smallest Scale of Hierarchy (SSH) survey is an ongoing strategic large program at the Large Binocular Telescope, aimed at the detection of faint stellar streams and satellites around 45 late-type dwarf galaxies located in the Local Universe within ≃10 Mpc. SSH exploits the wide-field, deep photometry provided by the Large Binocular Cameras in …
The XMM deep survey in the CDFS. XI. X-ray spectral properties of 185 bright sources
Brandt, W. N.; Vignali, C.; Gilli, R. +11 more
We present the X-ray spectra of 185 bright sources detected in the XMM-Newton deep survey of the Chandra Deep Field South with the three EPIC cameras combined. The 2-10 keV flux limit of the sample is 2 × 10-15 erg s-1 cm-2. The sources are distributed over a redshift range of z = 0.1-3.8, with 11 new X-ray redshif…
Erratum: The Herschel Bright Sources (HerBS): sample definition and SCUBA-2 observations
Ivison, R. J.; Omont, A.; Clements, D. L. +20 more
A study of the physical properties of SB2s with both the visual and spectroscopic orbits
Tamazian, Vakhtang S.; Campo, Pedro P.; Piccotti, Luca +4 more
The study of a selected set of 69 double-lined spectroscopic binaries (SB2) with well-defined visual and spectroscopic orbits was carried out. The orbital parallax, the mass, the colour, and the luminosity of each component were derived from observational data for almost all of these systems. We have also obtained an independent estimation of the …
Precise calibration of the dependence of surface brightness-colour relations on colour and class for late-type stars
White, T. R.; Huber, D.; Farrington, C. D. +9 more
Context. Surface brightness-colour relations (SBCRs) are used to derive the stellar angular diameters from photometric observations. They have various astrophysical applications, such as the distance determination of eclipsing binaries or the determination of exoplanet parameters. However, strong discrepancies between the SBCRs still exist in the …
Solar-Cycle Variation of the Subsurface Flows of Active- and Quiet-Region Subsets
Howe, R.; Komm, R.; Hill, F.
We study the solar-cycle variation of subsurface flows for both active and quiet solar regions. We derive flows from the surface to a depth of 16 Mm using ring-diagram analysis applied to Dopplergrams obtained with the Michelson Doppler Imager (MDI) Dynamics Program, the Global Oscillation Network Group (GONG), and the Helioseismic and Magnetic Im…
Paleolakes in the Northwest Hellas Region, Mars: Implications for the Regional Geologic History and Paleoclimate
Xiao, Long; Glotch, Timothy D.; Zhao, Jiannan
Hellas basin is one of the largest and oldest impact basins on the Martian surface. Its surrounding highland regions have undergone complicated geologic processes after the formation of Hellas basin. However, the geologic and climatic histories of the highlands surrounding Hellas are still unclear. Paleolakes provide us clues to answer these quest…
Statistical Analysis of the Relation between Coronal Mass Ejections and Solar Energetic Particles
Yashiro, Seiji; Nitta, Nariaki V.; Ichimoto, Kiyoshi +4 more
To improve the forecasting capability of impactful solar energetic particle (SEP) events, the relation between coronal mass ejections (CMEs) and SEP events needs to be better understood. Here we present a statistical study of SEP occurrences and timescales with respect to the CME source locations and speeds, considering all 257 fast (vCME
Optical interferometry and Gaia measurement uncertainties reveal the physics of asymptotic giant branch stars
Schultheis, M.; Millour, F.; Chiavassa, A. +20 more
Context. Asymptotic giant branch (AGB) stars are cool luminous evolved stars that are well observable across the Galaxy and populating Gaia data. They have complex stellar surface dynamics, which amplifies the uncertainties on stellar parameters and distances.
Aims: On the AGB star CL Lac, it has been shown that the convection-related variabi…
Cloud Atlas: Unraveling the Vertical Cloud Structure with the Time-series Spectrophotometry of an Unusually Red Brown Dwarf
Schneider, Glenn; Apai, Dániel; Marley, Mark +8 more
Rotational modulations of emission spectra in brown dwarf and exoplanet atmospheres show that clouds are often distributed non-uniformly in these ultracool atmospheres. The spatial heterogeneity in cloud distribution demonstrates the impact of atmospheric dynamics on cloud formation and evolution. In this study, we update the Hubble Space Telescop…