Search Publications
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…
Evidence of Magnetoacoustic Oscillations above the Brightened and Magnetically Active Quiet-Sun
Srivastava, A. K.; Dwivedi, B. N.
We study the near photospheric Fe I 6302 Å (V-component) and chromospheric Ca II H 3968 Å radiance oscillations in the lower solar atmosphere above the four brightened and magnetically active regions of the quiet-Sun as observed by the solar optical telescope onboard Hinode. At the chosen locations (L1, L3, L4), we obtain the statistically signifi…
Analysis of luminosity distributions of strong lensing galaxies: subtraction of diffuse lensed signal
Magain, P.; Biernaux, J.; Hauret, C.
Context. Strong gravitational lensing gives access to the total mass distribution of galaxies. It can unveil a great deal of information about the lenses' dark matter content when combined with the study of the lenses' light profile. However, gravitational lensing galaxies, by definition, appear surrounded by lensed signal, both point-like and dif…
Music and astronomy. II. Unitedsoundofcosmos
Caballero, J. A.; Arias, A.; Machuca, J. J. +1 more
We have been congratulated on the stage by a Nobel laureate (he was our curtain raiser), shocked audiences in rock concerts, written monthly on Musica Universalis , made the second concert in 3D in Spain after Kraftwerk and broadcasted it live in Radio 3, mixed our music with poetry read aloud by scientists, composed the soundtracks of CARMENES, Q…
Optical, Near-IR, and X-Ray Observations of SN 2015J and Its Host Galaxy
Boutsia, K.; Testa, V.; Nucita, A. A. +7 more
SN 2015J was discovered on 2015 April 27th and is classified as an SN IIn. At first, it appeared to be an orphan SN candidate, I.e., without any clear identification of its host galaxy. Here, we present an analysis of the observations carried out by the VLT 8 m class telescope with the FORS2 camera in the R band and the Magellan telescope (6.5 m) …