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The high energy X-ray probe (HEX-P): studying extreme accretion with ultraluminous X-ray sources
Frontiers in Astronomy and Space Sciences, 2023 Introduction: Ultraluminous X-ray sources (ULXs) represent an extreme class of accreting compact objects: from the identification of some of the accretors as neutron stars to the detection of powerful winds travelling at 0.1–0.2 c, the increasing ...
Matteo Bachetti +28 more
doaj +1 more source
Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. IX. 10 New Observations of Reverberation Mapping and Shortened Hβ Lags [PDF]
, 2018 As one paper in a series reporting on a large reverberation mapping campaign of super-Eddington accreting massive black holes (SEAMBHs) in active galactic nuclei (AGNs), we present the results of 10 SEAMBHs monitored spectroscopically during 2015–2017 ...
P. Du +12 more
semanticscholar +1 more source
UV excess measures of accretion onto young very low-mass stars and brown dwarfs [PDF]
, 2008 Low-resolution spectra from 3000-9000 AA of young low-mass stars and brown dwarfs were obtained with LRIS on Keck I. The excess UV and optical emission arising in the Balmer and Paschen continua yields mass accretion rates ranging from 2e-12 to 1e-8 Mo ...
Baraffe I. +8 more
core +2 more sources
, 2015 The Central Asian Orogenic Belt records the accretion and convergence of three collage systems that were finally rotated into two major oroclines. The Mongolia collage system was a long, N–S-oriented composite ribbon that was rotated to its current ...
W. Xiao +8 more
semanticscholar +1 more source
Mapping accretion and its variability in the young open cluster NGC 2264: a study based on u-band photometry [PDF]
, 2014 We aim at characterizing the accretion properties of several hundred members of the star-forming cluster NGC 2264 (3 Myr). We performed a deep u,g,r,i mapping and a simultaneous u+r monitoring of the region with CFHT/MegaCam in order to directly probe ...
Alencar, Silvia H. P. +11 more
core +4 more sources
, 1995 49p. To appear in XXI Canary Islands Winter School of Astrophysics, ed. T. Shahbaz, CUP (significantly improved, expanded and updated version of an earlier text)
openaire +5 more sources
, 2021 In the two-phase scenario of galaxy formation, a galaxy's stellar mass growth is first dominated by in-situ star formation, and subsequently by accretion. We analyse the radial distribution of the accreted stellar mass in ~500 galaxies from the hydrodynamical cosmological simulation Magneticum.
Remus, Rhea-Silvia, Forbes, Duncan A.
openaire +2 more sources
Universe, 2021 Double-spiral galaxies are common in the Universe. It is known that the logarithmic double spiral is a Maximum Entropy geometry in hyperbolic (flat) spacetime that well represents an idealised spiral galaxy, with its central supermassive black hole (SMBH)
Michael C. Parker, Chris Jeynes
doaj +1 more source
Evolution of Interstellar Medium, Star Formation, and Accretion at High Redshift [PDF]
, 2017 ALMA observations of the long wavelength dust continuum are used to estimate the interstellar medium (ISM) masses in a sample of 708 galaxies at z = 0.3 to 4.5 in the COSMOS field.
N. Scoville +23 more
semanticscholar +1 more source
Magellan Adaptive Optics Imaging of PDS 70: Measuring the Mass Accretion Rate of a Young Giant Planet within a Gapped Disk [PDF]
Astrophysical Journal Letters, 2018 PDS 70b is a recently discovered and directly imaged exoplanet within the wide (≳40 au) cavity around PDS 70. Ongoing accretion onto the central star suggests that accretion onto PDS 70b may also be ongoing.
K. Wagner +13 more
semanticscholar +1 more source