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Cosmic microwave background science at commercial airline altitudes
Peiris, Hiranya V.; Verde, Licia; Feeney, Stephen M. +2 more
Obtaining high-sensitivity measurements of degree-scale cosmic microwave background (CMB) polarization is the most direct path to detecting primordial gravitational waves. Robustly recovering any primordial signal from the dominant foreground emission will require high-fidelity observations at multiple frequencies, with excellent control of system…
Accurate Orbital Solution for the New and Metal-poor Eclipsing Binary Tycho 5227-1023-1
Munari, U.; Zwitter, T.; Traven, G. +1 more
The orbit and physical parameters of the previously unsolved double-lined eclipsing binary Tyc 5227-1023-1, discovered during the search for RR Lyr variable candidate members of the Aquarius stream, are derived using high-resolution échelle spectroscopy and V,{I}\prime photometry. A synthetic spectral analysis of both components has be…
Evidence for coherent spicule oscillations from correcting Hinode/SOT Ca II H in the south-east limb of the Sun
Ahangarzadeh Maralani, A. R.; Tavabi, E.; Ajabshirizadeh, A.
Wave theories of heating of the chromosphere, corona and solar wind due to photospheric fluctuations are strengthened by the existence of the wave coherency observed up to the transition region. The coherency of intensity oscillations of solar spicules was explored using the Solar Optical Telescope (SOT) on the Hinode spacecraft with increasing he…
Probing the nature of dark matter with deep XMM-Newton observations of the dwarf spheroidal galaxies
Boyarsky, A.; Ruchayskiy, O.
We report the results of the very large program with XMM-Newton (AO-14) devoted to deep observation of Draco dwarf spheroidal galaxy. The p-n junction (PN) camera shows a positive spectral feature at E = 3.54 ± 0.06 with a 2.3σ significance. The two Metal Oxide Semi-conductor (MOS) cameras show less-significant or no positive deviations, consisten…
Estimating the chromospheric magnetic field from a revised NLTE modelling: the case of HR 7428
Giarrusso, M.; Leone, F.; Frasca, A. +6 more
In this work, we use the semi-empirical atmospheric modelling method to obtain the chromospheric temperature, pressure, density and magnetic field distribution versus height in the K2 primary component of the RS CVn binary system HR 7428. While temperature, pressure and density are the standard output of the semi-empirical modelling technique, the…
Constraining galaxy cluster velocity field with the thermal Sunyaev-Zel'dovich and kinematic Sunyaev-Zel'dovich cross-bispectrum
Hurier, G.
The Sunyaev-Zel'dovich (SZ) effects are produced by the interaction of cosmic microwave background (CMB) photons with the ionized and diffuse gas of electrons inside galaxy clusters integrated along the line of sight. The two main effects are the thermal SZ (tSZ) produced by thermal pressure inside galaxy clusters and the kinematic SZ (kSZ) produc…
Erratum: “On the Existence of the Kolmogorov Inertial Range in the Terrestrial Magnetosheath Turbulence” (2017, ApJL, 836, L10)
Sahraoui, F.; Deng, X. H.; Huang, S. Y. +2 more
Spectroscopic studies of yellow supergiants in the Cepheid instability strip
Usenko, I. A.
High-resolution spectra of nine yellow nonvariable supergiants (NVSs) located within the canonical Cepheid instability strip from Sandage and Tammann (1969) ( α Aqr, ɛ Leo, µ Per, ω Gem, BD+60 2532, HD 172365, HD 187299, HD 190113, and HD 200102) were taken with the 1-m Zeiss and 6-m BTA telescopes at the Special Astrophysical Observatory of…
Study of BL Lac objects in far infrared and submillimetre region
Seal Braun, P.
Here 35 BL Lac objects are studied from far infrared to submillimetre region (60 µm–850 µm) using the observational data from IRAS, ISO and SCUBA. Twelve Fanaroff–Riley radio galaxies are also studied for comparison. Using the flux densities at the far infrared and submillimetre bands, the luminosities, dust temperatures and dust masse…
ESASky: The whole of space Astronomy at your fingertips
Giordano, F.; de Teodoro, P.; Baines, D. +11 more
ESASky is a new science-driven discovery portal for all ESA astronomical missions that gives users worldwide a simplified access to high-level science-ready products from ESA and other data providers. The tool features a sky exploration interface and a single/multiple target interface, and it requires no prior knowledge of specific details of each…