A quasar microlensing light-curve generator for LSST [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT We present a tool to generate mock quasar microlensing light curves and sample them according to any observing strategy. An updated treatment of the fixed and random velocity components of observer, lens, and source is used, together with a proper alignment with the external shear defining the magnification map caustic ...
Georgios Vernardos +2 more
openaire +2 more sources
A Generative Model for Quasar Spectra
The Astrophysical Journal, 2022 Abstract We build a multi-output generative model for quasar spectra and the properties of their black hole engines, based on a Gaussian process latent-variable model. This model treats every quasar as a vector of latent properties such that the spectrum and all physical properties of the quasar are associated with non-linear functions ...
Anna–Christina Eilers +5 more
openaire +4 more sources
Astroinformatics of galaxies and quasars: a new general method for photometric redshifts estimation [PDF]
Monthly Notices of the Royal Astronomical Society, 2011 © 2011 The Authors. Monthly Notices of the Royal Astronomical Society © 2011 Royal Astronomical Society. Accepted 2011 July 10; Received 2011 June 17; in original form 2011 March 9. This work was made possible by the financial support of the US Virtual Astronomical Observatory, which is sponsored by the National Science Foundation and the National ...
O. Laurino +3 more
openaire +5 more sources
Cosmic ray generation by quasar remnants: constraints and implications [PDF]
Monthly Notices of the Royal Astronomical Society, 2000 The quasar remnant cores of nearby giant elliptical galaxies NGC 4486 (M87), NGC 1399, NGC 4649 and NGC 4472 are the sites of supermassive (greater than one billion solar masses) black holes. These objects are investigated as to the viability of the conjecture that they could harbor compact dynamos capable of generating the highest energy cosmic rays ...
Boldt, Elihu, Loewenstein, Michael
openaire +2 more sources
CONSTRAINING SUB-PARSEC BINARY SUPERMASSIVE BLACK HOLES IN QUASARS WITH MULTI-EPOCH SPECTROSCOPY. I. THE GENERAL QUASAR POPULATION [PDF]
The Astrophysical Journal, 2013 replaced with accepted version; ApJ, in ...
Shen, Yue +3 more
openaire +4 more sources
Testing general relativity on cosmological scales at redshift z ∼ 1.5 with quasar and CMB lensing [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT We test general relativity (GR) at the effective redshift $\bar{z} \sim 1.5$ by estimating the statistic EG, a probe of gravity, on cosmological scales $19 - 190\, h^{-1}{\rm Mpc}$. This is the highest redshift and largest scale estimation of EG so far.
Yucheng Zhang +12 more
openaire +6 more sources
Weak13CO in the Cloverleaf quasar: evidence for a young, early generation starburst [PDF]
Astronomy and Astrophysics, 2010 7 pages, 5 figures, accepted for publication in A&A (Main Journal)
Henkel, C. +4 more
openaire +3 more sources
Quadruply-imaged quasars: some general features
, 2020 11 pages, 12 figures, accepted for publication in Journal of the Korean Astronomical Society (JKAS)
Tuan-Anh, P. +8 more
openaire +2 more sources
PHOTOMETRIC REDSHIFTS AND QUASAR PROBABILITIES FROM A SINGLE, DATA-DRIVEN GENERATIVE MODEL [PDF]
The Astrophysical Journal, 2012 We describe a technique for simultaneously classifying and estimating the redshift of quasars. It can separate quasars from stars in arbitrary redshift ranges, estimate full posterior distribution functions for the redshift, and naturally incorporate flux uncertainties, missing data, and multi-wavelength photometry.
Bovy, Jo +9 more
openaire +2 more sources
QUANTIFYING QUASAR VARIABILITY AS PART OF A GENERAL APPROACH TO CLASSIFYING CONTINUOUSLY VARYING SOURCES [PDF]
The Astrophysical Journal, 2009 Robust fast methods to classify variable light curves in large sky surveys are becoming increasingly important. While it is relatively straightforward to identify common periodic stars and particular transient events (supernovae, novae, microlensing), there is no equivalent for non-periodic continuously varying sources (quasars, aperiodic stellar ...
Kozlowski, Szymon +10 more
openaire +2 more sources