Search Publications

Strong coronal channelling and interplanetary evolution of a solar storm up to Earth and Mars

Dumbović, Mateja; Temmer, Manuela; Vršnak, Bojan +15 more

The severe geomagnetic effects of solar storms or coronal mass ejections (CMEs) are to a large degree determined by their propagation direction with respect to Earth. There is a lack of understanding of the processes that determine their non-radial propagation. Here we present a synthesis of data from seven different space missions of a fast CME, …

Properties of flat-spectrum radio-loud narrow-line Seyfert 1 galaxies

Maraschi, L.; Tagliaferri, G.; Lähteenmäki, A. +27 more

We have conducted a multiwavelength survey of 42 radio loud narrow-1ine Seyfert 1 galaxies (RLNLS1s), selected by searching among all the known sources of this type and omitting those with steep radio spectra. We analyse data from radio frequencies to X-rays, and supplement these with information available from online catalogues and the literature…

Dissipation and heating in solar wind turbulence: from the macro to the micro and back again

Chapman, S. C.; Osman, K. T.; Kiyani, K. H.

New redshift z ≃ 9 galaxies in the Hubble Frontier Fields: implications for early evolution of the UV luminosity density

McLure, R. J.; Dunlop, J. S.; McLeod, D. J. +3 more

We present the results of a new search for galaxies at redshift z ≃ 9 in the first two Hubble Frontier Fields with completed HST WFC3/IR and ACS imaging. To ensure robust photometric redshift solutions, and to minimize incompleteness, we confine our search to objects with H₁₆₀ < 28.6 (AB mag), consider only image regions with an rms …

T-PHOT: A new code for PSF-matched, prior-based, multiwavelength extragalactic deconfusion photometry

Elbaz, D.; Shu, X.; Ferguson, H. C. +19 more

Context. The advent of deep multiwavelength extragalactic surveys has led to the necessity for advanced and fast methods for photometric analysis. In fact, codes which allow analyses of the same regions of the sky observed at different wavelengths and resolutions are becoming essential to thoroughly exploit current and future data. In this context…

Photohadronic origin of γ -ray BL Lac emission: implications for IceCube neutrinos

Padovani, P.; Resconi, E.; Mastichiadis, A. +2 more

The recent IceCube discovery of 0.1-1 PeV neutrinos of astrophysical origin opens up a new era for high-energy astrophysics. Although there are various astrophysical candidate sources, a firm association of the detected neutrinos with one (or more) of them is still lacking. A recent analysis of plausible astrophysical counterparts within the error…

New Constraints on the Faint End of the UV Luminosity Function at z ~ 7-8 Using the Gravitational Lensing of the Hubble Frontier Fields Cluster A2744

Richard, Johan; Schaerer, Daniel; Kneib, Jean-Paul +8 more

Exploiting the power of gravitational lensing, the Hubble Frontier Fields (HFF) program aims at observing six massive galaxy clusters to explore the distant universe far beyond the limits of blank field surveys. Using the complete Hubble Space Telescope observations of the first HFF cluster A2744, we report the detection of 50 galaxy candidates at…

The behaviour of dark matter associated with four bright cluster galaxies in the 10 kpc core of Abell 3827

Richard, Johan; Hilton, Matt; Massey, Richard +20 more

Galaxy cluster Abell 3827 hosts the stellar remnants of four almost equally bright elliptical galaxies within a core of radius 10 kpc. Such corrugation of the stellar distribution is very rare, and suggests recent formation by several simultaneous mergers. We map the distribution of associated dark matter, using new Hubble Space Telescope imaging …

The Herschel Comprehensive (U)LIRG Emission Survey (HERCULES): CO Ladders, Fine Structure Lines, and Neutral Gas Cooling

Veilleux, S.; Sanders, D. B.; Isaak, K. G. +27 more

(Ultra) luminous infrared galaxies ((U)LIRGs) are objects characterized by their extreme infrared (8-1000 µm) luminosities (L _LIRG > 10¹¹ L _⊙ and L _ULIRG > 10¹² L _⊙). The Herschel Comprehensive ULIRG Emission Survey (PI: van der Werf) presents a representative flux-limit…

The far-infrared/radio correlation and radio spectral index of galaxies in the SFR-M_∗ plane up to z~2

Berta, S.; Magnelli, B.; Nordon, R. +21 more

We study the evolution of the radio spectral index and far-infrared/radio correlation (FRC) across the star-formation rate - stellar masse (i.e. SFR-M_∗) plane up to z ~ 2. We start from a stellar-mass-selected sample of galaxies with reliable SFR and redshift estimates. We then grid the SFR-M_∗ plane in several redshift ranges…