Parsec ≈ Parsec
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A NEW GENERATION OF PARSEC-COLIBRI STELLAR ISOCHRONES INCLUDING THE TP-AGB PHASE Open
We introduce a new generation of PARSEC – COLIBRI stellar isochrones that includes a detailed treatment of the thermally pulsing asymptotic giant branch (TP-AGB) phase, covering a wide range of initial metallicities (0.0001 < Z i < 0.06). …
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Kinematics of Parsec-scale Jets of Gamma-Ray Blazars at 43 GHz within the VLBA-BU-BLAZAR Program Open
We analyze the parsec-scale jet kinematics from 2007 June to 2013 January of a sample of γ -ray bright blazars monitored roughly monthly with the Very Long Baseline Array at 43 GHz. In a total of 1929 images, we measure apparent speeds of …
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PARSEC V2.0: Stellar tracks and isochrones of low- and intermediate-mass stars with rotation Open
We present a new comprehensive collection of stellar evolutionary tracks and isochrones for rotating low- and intermediate-mass stars assembled with the updated version of PARSEC V 2.0. This version includes our recent calibration of the e…
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Observational Evidence for the Origin of High-energy Neutrinos in Parsec-scale Nuclei of Radio-bright Active Galaxies Open
Observational information on high-energy astrophysical neutrinos is being continuously collected by the IceCube observatory. However, the sources of the neutrinos are still unknown. In this study, we use radio very long baseline interferom…
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A parsec-scale Galactic 3D dust map out to 1.25 kpc from the Sun Open
Context. High-resolution 3D maps of interstellar dust are critical for probing the underlying physics shaping the structure of the interstellar medium, and for foreground correction of astrophysical observations affected by dust. Aims. We …
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An overabundance of black hole X-ray binaries in the Galactic Centre from tidal captures Open
A large population of X-ray binaries (XRBs) was recently discovered within the central parsec of the Galaxy by Hailey et al. While the presence of compact objects on this scale due to radial mass segregation is, in itself, unsurprising, th…
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Kinematics of Parsec-scale Jets of Gamma-Ray Blazars at 43 GHz during 10 yr of the VLBA-BU-BLAZAR Program Open
We analyze the parsec-scale jet kinematics from 2007 June to 2018 December of a sample of γ -ray bright blazars monitored roughly monthly with the Very Long Baseline Array (VLBA) at 43 GHz under the VLBA-BU-BLAZAR program. We implement a n…
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VLBI-<i>Gaia</i>offsets favor parsec-scale jet direction in active galactic nuclei Open
The data release 1 (DR1) of milliarcsecond-scale accurate optical positions\nof stars and galaxies was recently published by the space mission Gaia. We\nstudy the offsets of highly accurate absolute radio (very long baseline\ninterferometr…
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Dissecting the active galactic nucleus in Circinus – II. A thin dusty disc and a polar outflow on parsec scales Open
Recent observations which resolved the mid-infrared (MIR) emission of nearby\nactive galactic nuclei (AGN), surprisingly revealed that their dust emission\nappears prominently extended in the polar direction, at odds with the\nexpectations…
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Brownian motion of massive black hole binaries and the final parsec problem Open
Massive black hole binaries (BHBs) are expected to be one of the most powerful sources of gravitational waves in the frequency range of the pulsar timing array and of forthcoming space-borne detectors. They are believed to form in the fina…
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LeMMINGs – II. The <i>e</i>-MERLIN legacy survey of nearby galaxies. The deepest radio view of the Palomar sample on parsec scale Open
We present the second data release of high-resolution (≤0.2 arcsec) 1.5-GHz radio images of 177 nearby galaxies from the Palomar sample, observed with the e-MERLIN array, as part of the Legacy e-MERLIN Multi-band Imaging of Nearby Galaxies…
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Infalling clouds on to supermassive black hole binaries – II. Binary evolution and the final parsec problem Open
The formation of massive black hole binaries (MBHBs) is an unavoidable\noutcome of galaxy evolution via successive mergers. However, the mechanism that\ndrives their orbital evolution from parsec separations down to the\ngravitational wave…
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ACCELERATION OF COMPACT RADIO JETS ON SUB-PARSEC SCALES Open
Jets of compact radio sources are highly relativistic and Doppler boosted, making studies of their intrinsic properties difficult. Observed brightness temperatures can be used to study the intrinsic physical properties of relativistic jets…
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EMISSION SIGNATURES FROM SUB-PARSEC BINARY SUPERMASSIVE BLACK HOLES. I. DIAGNOSTIC POWER OF BROAD EMISSION LINES Open
Motivated by advances in observational searches for sub-parsec supermassive black hole binaries (SBHBs) made in the past few years, we develop a semi-analytic model to describe spectral emission-line signatures of these systems. The goal o…
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Parsec scale Faraday-rotation structure across the jets of nine active galactic nuclei Open
A number of groups have recently been active in searching for gradients in\nthe ob- served Faraday rotation measure (RM) across jets of Active Galactic\nNuclei (AGNs) on various scales and estimating their reliability. Such RM\nstructures …
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Sub-parsec resolution cosmological simulations of star-forming clumps at high redshift with feedback of individual stars Open
We introduce a new set of zoom-in cosmological simulations with sub-pc resolution, intended to model extremely faint, highly magnified star-forming stellar clumps, detected at z = 6.14 thanks to gravitational lensing. The simulations inclu…
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MOJAVE – XX. Persistent linear polarization structure in parsec-scale AGN jets Open
We analysed the parsec-scale linear polarization properties of 436 active galactic nuclei (AGNs) based on 15 GHz polarimetric Very Long Baseline Array observations. We present polarization and total intensity images averaged over at least …
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Constructing Neuronal Network Models in Massively Parallel Environments Open
Recent advances in the development of data structures to represent spiking neuron network models enable us to exploit the complete memory of petascale computers for a single brain-scale network simulation. In this work, we investigate how …
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Gamma-ray emission in radio galaxies under the VLBI scope Open
Aims . In the framework of the multi-wavelength and very long baseline interferometry (VLBI) monitoring program TANAMI (Tracking Active Nuclei with Austral Milliarcsecond Interferometry), we study the evolution of the parsec-scale radio em…
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A parsec-scale optical jet from a massive young star in the Large Magellanic Cloud Open
Highly collimated parsec-scale jets, which are generally linked to the presence of an accretion disk, are commonly observed in low-mass young stellar objects. In the past two decades, a few of these jets have been directly (or indirectly) …
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Axion core–halo mass and the black hole–halo mass relation: constraints on a few parsec scales Open
If the dark matter is made of ultralight axions, stable solitonic cores form at the centres of virialized haloes. In some range for the mass m of the axion particle, these cores are sufficiently compact and can mimic supermassive black hol…
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WiSync Open
Peer Reviewed
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MAMBO Open
As the ARM architecture expands beyond its traditional embedded domain, there is a growing interest in dynamic binary modification (DBM) tools for general-purpose multicore processors that are part of the ARM family. Existing DBM tools for…
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Star cluster progenitors are dynamically decoupled from their parent molecular clouds Open
The formation of stellar clusters dictates the pace at which galaxies evolve, and solving the question of their formation will undoubtedly lead to a better understanding of the Universe as a whole. While it is well known that star clusters…
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Parsec-scale jet properties of the gamma-ray quasar 3C 286 Open
The quasar 3C~286 is one of two compact steep spectrum sources detected by\nthe {\\it Fermi}/LAT. Here, we investigate the radio properties of the\nparsec(pc)-scale jet and its (possible) association with the $\\gamma$-ray\nemission in 3C~…
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A parsec-scale radio jet launched by the central intermediate-mass black hole in the dwarf galaxy SDSS J090613.77+561015.2 Open
The population of intermediate-mass black holes (IMBHs) in nearby dwarf galaxies plays an important ‘ground truth’ role in exploring black hole formation and growth in the early Universe. In the dwarf elliptical galaxy SDSS J090613.77+5610…
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Supernova kicks and dynamics of compact remnants in the Galactic Centre Open
The Galactic Centre (GC) is a unique place to study the extreme dynamical\nprocesses occurring near a super-massive black hole (SMBH). Here we investigate\nthe role of supernova (SN) explosions occurring in massive binary systems lying\nin…
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Repeating Fast Radio Bursts Reveal Memory from Minutes to an Hour Open
Fast radio bursts (FRBs) are brief, luminous pulses with unknown physical origin. The repetition pattern of FRBs contains essential information about their physical nature and emission mechanisms. Using the two largest samples of FRB 20121…
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Detection of a parsec-scale jet in a radio-quiet narrow-line Seyfert 1 galaxy with highly accreting supermassive black hole Open
The jet in active galactic nuclei (AGN) is a key ingredient in understanding the co-evolution of galaxies and their central supermassive black holes (SMBHs). Unfortunately, the mechanism of jet launching and collimation is still elusive. T…
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Performance and Energy Trade-Offs for Parallel Applications on Heterogeneous Multi-Processing Systems Open
This work proposes a methodology to find performance and energy trade-offs for parallel applications running on Heterogeneous Multi-Processing systems with a single instruction-set architecture. These offer flexibility in the form of diffe…