59 citations · 354 across the 25 of their papers we have counts for
26 papers
No evidence of vorticity production from irrotational turbulent gravitational collapse yet
Axel Brandenburg, Evangelia Ntormousi, Jennifer Schober
Gravitational collapse creates large amounts of kinetic energy that could potentially seed turbulence. If such turbulence were also suitable to initiate dynamo action, the resultin…
Cosmic ray heating of cold streams: Implications for the gas supply and growth of massive galaxies
Ellis R. Owen, Nicolas Ledos, Evangelia Ntormousi +3
Recent observations have demonstrated the presence of cosmic rays (CRs) in cosmic-web filaments. Cold streams supply gas inflows from these filaments into massive galaxies during t…
The dynamical origin of the magnetic field distributions in compressible turbulence
Evangelia Ntormousi, Fabio Del Sordo
Magnetohydrodynamical (MHD) simulations of isothermal compressible turbulence report that the density distribution is well described by a lognormal with a variance proportional to…
SIMPLIFI -- Study of Interstellar Magnetic Polarization: a Legacy Investigation of Filaments. I. Magnetically-Guided Accretion onto the DR21 Ridge
Thushara G. S. Pillai, Jens Kauffmann, Juan D. Soler +15
We present first results from SIMPLIFI (Study of Interstellar Magnetic Polarization: a Legacy Investigation of Filaments), a SOFIA/HAWC+ polarimetric survey of Galact…
Is feedback-free star formation possible?
A. Ferrara, D. Manzoni, E. Ntormousi
It has been suggested that, if the free-fall time of star-forming clouds is shorter than the lifetime ( Myr) of massive stars exploding as supernovae (SN), a large frac…
Magnetic field amplification during a turbulent collapse
Axel Brandenburg, Evangelia Ntormousi
The question of whether a dynamo can be triggered by gravitational collapse is of great interest, especially for the early Universe. Here, we employ supercomoving coordinates to st…
Strong turbulence and magnetic coherent structures in the interstellar medium
Evangelia Ntormousi, Loukas Vlahos, Anna Konstantinou +1
Magnetic turbulence is classified as weak or strong based on the relative amplitude of the magnetic field fluctuations compared to the mean field. These two classifications have di…
Magnetising galaxies with cold inflows
Nicolas Ledos, Evangelia Ntormousi, Shinsuke Takasao +1
High-redshift () galaxies accrete circumgalactic gas through cold streams. Recent high-resolution MHD simulations of these streams showed a significant amplification of t…
Extragalactic Magnetism with SOFIA (SALSA Legacy Program). VII. A Tomographic View of Far-infrared and Radio Polarimetric Observations through MHD Simulations of Galaxies
Sergio Martin-Alvarez, Enrique Lopez-Rodriguez, Tara Dacunha +17
The structure of magnetic fields in galaxies remains poorly constrained, despite the importance of magnetism in the evolution of galaxies. Radio synchrotron and far-infrared (FIR)…
Extragalactic magnetism with SOFIA (SALSA Legacy Program) -- V: First results on the magnetic field orientation of galaxies
Alejandro S. Borlaff, Enrique Lopez-Rodriguez, Rainer Beck +13
We present the analysis of the magnetic field (-field) structure of galaxies measured with far-infrared (FIR) and radio (3 and 6 cm) polarimetric observations. We use the first…
Extragalactic magnetism with SOFIA (SALSA Legacy Program). VI. The magnetic fields in the multi-phase interstellar medium of the Antennae galaxies
Enrique Lopez-Rodriguez, Alejandro S. Borlaff, Rainer Beck +8
Mergers are thought to be a fundamental channel for galaxy growth, perturbing the gas dynamics and the magnetic fields (B-fields) in the interstellar medium (ISM). However, the mec…
A closer look at supernovae as seeds for galactic magnetization
Evangelia Ntormousi, Fabio Del Sordo, Matteo Cantiello +1
Explaining the currently observed magnetic fields in galaxies requires relatively strong seeding in the early Universe. One theory proposes that magnetic fields of the order of …
Galactic Dynamos
Axel Brandenburg, Evangelia Ntormousi
Spiral galaxies, including the Milky Way, have large-scale magnetic fields with significant energy densities. The dominant theory attributes these magnetic fields to a large-scale…
Extragalactic magnetism with SOFIA (SALSA Legacy Program) -- IV: Program overview and first results on the polarization fraction
Enrique Lopez-Rodriguez, Sui Ann Mao, Rainer Beck +12
We present the first data release of the Survey on extragALactic magnetiSm with SOFIA (SALSA Legacy Program) with a set of 14 nearby ( Mpc) galaxies with resolved imaging pola…
Extragalactic magnetism with SOFIA (SALSA Legacy Program) -- III: First data release and on-the-fly polarization mapping characterization
Enrique Lopez-Rodriguez, Melanie Clarke, Sachin Shenoy +17
We describe the data processing of the Survey on extragALactic magnetiSm with SOFIA (SALSA Legacy Program). This first data release presents 33% (51.34h out of 155.7h, including ov…
First look at the multiphase interstellar medium with synthetic observations of low-frequency Faraday tomography
A. Bracco, E. Ntormousi, V. Jelić +6
Faraday tomography of radio polarimetric data below 200 MHz from LOFAR are providing us with a new perspective on the diffuse and magnetized interstellar medium (ISM). Of particula…
Magnetic fields in star formation: from clouds to cores
Kate Pattle, Laura Fissel, Mehrnoosh Tahani +2
In this chapter we review recent advances in understanding the roles that magnetic fields play throughout the star formation process, gained through observations and simulations of…
Dynamo effect in unstirred self-gravitating turbulence
Axel Brandenburg, Evangelia Ntormousi
In many astrophysical environments, self-gravity can generate kinetic energy, which, in principle, is available for driving dynamo action. Using direct numerical simulations, we sh…
Extragalactic magnetism with SOFIA (Legacy Program) -- II: A magnetically-driven flow in the starburst ring of NGC 1097
Enrique Lopez-Rodriguez, Rainer Beck, Susan E. Clark +10
Galactic bars are frequent in disk galaxies and they may support the transfer of matter towards the central engine of active nuclei. The barred galaxy NGC 1097 has magnetic forces…
Extragalactic Magnetism with SOFIA (Legacy Program) -- I: The magnetic field in the multi-phase interstellar medium of M51
Alejandro S. Borlaff, Enrique Lopez-Rodriguez, Rainer Beck +17
The recent availability of high-resolution far-infrared (FIR) polarization observations of galaxies using HAWC+/SOFIA has facilitated studies of extragalactic magnetic fields in th…
A dynamo amplifies the magnetic field of a Milky-Way-like galaxy
Evangelia Ntormousi, Konstantinos Tassis, Fabio Del Sordo +2
The magnetic fields of spiral galaxies are so strong that they cannot be primordial. Their typical values are over one billion times higher than any value predicted for the early U…
Turnaround radius of galaxy clusters in N-body simulations
Giorgos Korkidis, Vasiliki Pavlidou, Konstantinos Tassis +3
We use N-body simulations to examine whether a characteristic turnaround radius, as predicted from the spherical collapse model in a Universe, can be meaningfully iden…
Probing the cold magnetized Universe with SPICA-POL (B-BOP)
Ph. André, A. Hughes, V. Guillet +53
SPICA, the cryogenic infrared space telescope recently pre-selected for a `Phase A' concept study as one of the three remaining candidates for ESA's fifth medium class (M5) mission…
Magnetic fields in massive spirals: The role of feedback and initial conditions
Evangelia Ntormousi
Magnetic fields play a very important role in the evolution of galaxies through their direct impact on star formation and stellar feedback-induced turbulence. However, their co-evo…