Search Publications
Flux conservation, radial scalings, Mach numbers, and critical distances in the solar wind: magnetohydrodynamics and Ulysses observations
Verscharen, Daniel; Velli, Marco; Bale, Stuart D.
One of the key challenges in solar and heliospheric physics is to understand the acceleration of the solar wind. As a super-sonic, super-Alfvénic plasma flow, the solar wind carries mass, momentum, energy, and angular momentum from the Sun into interplanetary space. We present a framework based on two-fluid magnetohydrodynamics to estimate the flu…
An ALMA view of 11 dusty star-forming galaxies at the peak of cosmic star formation history
Cimatti, A.; Pozzi, F.; Massardi, M. +10 more
We present the ALMA view of 11 main-sequence dusty star-forming galaxies (DSFGs) (sub-)millimetre selected in the Great Observatories Origins Survey South (GOODS-S) field and spectroscopically confirmed to be at the peak of cosmic star formation history (z ~ 2). Our study combines the analysis of galaxy spectral energy distribution with ALMA conti…
CLUMP-3D: the lack of non-thermal motions in galaxy cluster cores
Cui, Weiguang; Umetsu, Keiichi; Sereno, Mauro +5 more
We report the non-thermal pressure fraction (Pnt/Ptot) obtained from a three-dimensional triaxial analysis of 16 galaxy clusters in the CLASH sample using gravitational lensing (GL) data primarily from Subaru and HST, X-ray spectroscopic imaging from Chandra, and Sunyaev-Zel'dovich effect (SZE) data from Planck and Bolocam. O…
The post-Herschel view of intrinsic AGN emission: constructing templates for galaxy and AGN emission at IR wavelengths
Alexander, D. M.; Mullaney, J. R.; Rosario, D. J. +3 more
Measuring the star-forming properties of active galactic nucleus (AGN) hosts is key to our understanding of galaxy formation and evolution. However, this topic remains debated, partly due to the difficulties in separating the infrared (i.e. 1-1000 ${\rm \mu m}$) emission into AGN and star-forming components. Taking advantage of archival far-infrar…
Testing the fossil field hypothesis: could strongly magnetized OB stars produce all known magnetars?
Igoshev, Andrei P.; Kholtygin, A. F.; Makarenko, Ekaterina I.
Stars of spectral types O and B produce neutron stars (NSs) after supernova explosions. Most of NSs are strongly magnetized including normal radio pulsars with B ∝ 1012 G and magnetars with B ∝ 1014 G. A fraction of 7-12 per cent of massive stars are also magnetized with B ∝ 103 G and some are weakly magnetized wit…
Unveiling the nature of 11 dusty star-forming galaxies at the peak of cosmic star formation history
Cimatti, A.; Pozzi, F.; Danese, L. +9 more
We present a panchromatic study of 11 (sub-)millimetre selected DSFGs with spectroscopically confirmed redshift (1.5 < zspec < 3) in the GOODS-S field, with the aim of constraining their astrophysical properties (e.g. age, stellar mass, dust, and gas content) and characterizing their role in the context of galaxy evolution. The mu…
WISDOM project - VI. Exploring the relation between supermassive black hole mass and galaxy rotation with molecular gas
Sarzi, Marc; Cappellari, Michele; Davis, Timothy A. +6 more
Empirical correlations between the masses of supermassive black holes (SMBHs) and properties of their host galaxies are well established. Among these is the correlation with the flat rotation velocity of each galaxy measured either at a large radius in its rotation curve or via a spatially integrated emission-line width. We propose here the use of…
Broad-band X-ray observations of the 2018 outburst of the changing-look active galactic nucleus NGC 1566
Ricci, Claudio; Naik, Sachindra; Jana, Arghajit +5 more
We study the nature of the changing-look active galactic nucleus NGC 1566 during its 2018 June outburst. During the outburst, the X-ray intensity of the source rises up to ~25-30 times compared to its quiescent state intensity. We perform timing and spectral analysis of the source during pre-outburst, outburst, and post-outburst epochs using semis…
The KMOS galaxy evolution survey (KGES): the angular momentum of star-forming galaxies over the last ≈10 Gyr
Smail, I.; Swinbank, A. M.; Obreschkow, D. +8 more
We present the KMOS Galaxy Evolution Survey (KGES), a K-band Multi-Object Spectrograph (KMOS) study of the H α and [N II] emission from 288 K-band-selected galaxies at 1.2 ≲ z ≲ 1.8, with stellar masses in the range $\log _{10}(M_{*}/\rm {M}_{\odot })\approx 9$ - 11.5. In this paper, we describe the survey design, present the sample, and discuss t…
GASTON: Galactic Star Formation with NIKA2 - evidence for the mass growth of star-forming clumps
Berta, S.; Aussel, H.; Adam, R. +44 more
Determining the mechanism by which high-mass stars are formed is essential for our understanding of the energy budget and chemical evolution of galaxies. By using the New IRAM KIDs Array 2 (NIKA2) camera on the Institut de Radio Astronomie Millimétrique (IRAM) 30-m telescope, we have conducted high-sensitivity and large-scale mapping of a fraction…