Search Results - "SHANKAR, F"
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BLACK HOLE AND GALAXY COEVOLUTION FROM CONTINUITY EQUATION AND ABUNDANCE MATCHING
Published in The Astrophysical journal (01-09-2015)“…ABSTRACT We investigate the coevolution of galaxies and hosted supermassive black holes (BHs) throughout the history of the universe by a statistical approach…”
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The massive end of the luminosity and stellar mass functions: dependence on the fit to the light profile
Published in Monthly notices of the Royal Astronomical Society (21-11-2013)“…In addition to the large systematic differences arising from assumptions about the stellar mass-to-light ratio, the massive end of the stellar mass function is…”
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High-redshift Galaxies from Early JWST Observations: Constraints on Dark Energy Models
Published in Astrophysical journal. Letters (01-10-2022)“…Abstract Early observations with JWST have led to the discovery of an unexpectedly large density (stellar-mass density ρ * ≈ 10 6 M ⊙ Mpc −3 ) of massive…”
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QSFit: automatic analysis of optical AGN spectra
Published in Monthly notices of the Royal Astronomical Society (01-12-2017)“…Abstract We present QSFit (Quasar Spectral Fitting package), a new software package to automatically perform the analysis of active galactic nuclei (AGNs)…”
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The Dramatic Size and Kinematic Evolution of Massive Early-type Galaxies
Published in The Astrophysical journal (10-04-2018)“…We aim to provide a holistic view on the typical size and kinematic evolution of massive early-type galaxies (ETGs) that encompasses their high-z star-forming…”
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Systematic effects on the size–luminosity relations of early- and late-type galaxies: dependence on model fitting and morphology
Published in Monthly notices of the Royal Astronomical Society (01-09-2014)“…We quantify the systematics in the size–luminosity relation of galaxies in the Sloan Digital Sky Survey main sample (i.e. at z ∼ 0.1) which arise from fitting…”
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TwO Parameters Semi Empirical Model (TOPSEM): Galaxy Evolution and Bulge/Disk Dicothomy from Two-stage Halo Accretion
Published in The Astrophysical journal (01-09-2023)“…Abstract In recent years, increasing attention has been devoted to semi-empirical, data-driven models to tackle some aspects of the complex and still largely…”
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The significant effects of stellar mass estimation on galaxy pair fractions
Published in Monthly notices of the Royal Astronomical Society (01-12-2020)“…ABSTRACT Theoretical models suggest that galaxy mergers may have profoundly shaped galaxy morphologies through cosmic time. However, observational estimates of…”
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Outflows in the Disks of Active Galaxies
Published in The Astrophysical journal (01-06-2019)“…Recent advances in observations have provided a wealth of measurements of the expansions of outflows in galactic disks out to large radii in a variety of…”
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Host galaxies of luminous z ∼ 0.6 quasars: major mergers are not prevalent at the highest AGN luminosities
Published in Monthly notices of the Royal Astronomical Society (01-04-2017)“…Abstract Galaxy interactions are thought to be one of the main triggers of active galactic nuclei (AGN), especially at high luminosities, where the accreted…”
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A statistical semi-empirical model: satellite galaxies in groups and clusters
Published in Monthly notices of the Royal Astronomical Society (21-02-2019)Get full text
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The cosmic growth of the active black hole population at 1 <z <2 in zCOSMOS, VVDS and SDSS
Published in Monthly notices of the Royal Astronomical Society (01-03-2015)“…We present a census of the active black hole population at 1 < z < 2, by constructing the bivariate distribution function of black hole mass and Eddington…”
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The evolution of the mass-size relation for early-type galaxies from z ∼ 1 to the present: dependence on environment, mass range and detailed morphology
Published in Monthly notices of the Royal Astronomical Society (11-01-2013)“…We study the dependence of the galaxy size evolution on morphology, stellar mass and large-scale environment for a sample of 298 group and 384 field quiescent…”
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The massive end of the luminosity and stellar mass functions and clustering from CMASS to SDSS: evidence for and against passive evolution
Published in Monthly notices of the Royal Astronomical Society (01-02-2016)“…We describe the luminosity function, based on Sérsic fits to the light profiles, of CMASS galaxies at z ∼ 0.55. Compared to previous estimates, our…”
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New Relationships between Galaxy Properties and Host Halo Mass, and the Role of Feedbacks in Galaxy Formation
Published in The Astrophysical journal (20-05-2006)“…We present new relationships between halo masses (M sub(h)) and several galaxy properties, including r*-band luminosities (L sub(r)), stellar (M sub(star)) and…”
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The high-mass end of the stellar mass function: dependence on stellar population models and agreement between fits to the light profile
Published in Monthly notices of the Royal Astronomical Society (23-01-2017)“…Abstract We quantify the systematic effects on the stellar mass function that arise from assumptions about the stellar population, as well as how one fits the…”
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THE CHANDRA COSMOS-LEGACY SURVEY: THE z > 3 SAMPLE
Published in The Astrophysical journal (20-08-2016)“…ABSTRACT We present the largest high-redshift (3 < z < 6.85) sample of X-ray-selected active galactic nuclei (AGNs) on a contiguous field, using sources…”
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Building Robust Active Galactic Nuclei Mock Catalogs to Unveil Black Hole Evolution and for Survey Planning
Published in The Astrophysical journal (01-07-2021)“…Abstract The statistical distributions of active galactic nuclei (AGNs), i.e., accreting supermassive black holes (BHs), in mass, space, and time are…”
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Galaxy luminosities, stellar masses, sizes, velocity dispersions as a function of morphological type
Published in Monthly notices of the Royal Astronomical Society (01-06-2010)“…We provide fits to the distribution of galaxy luminosity, size, velocity dispersion and stellar mass as a function of concentration index Cr and morphological…”
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The role of scatter and satellites in shaping the large-scale clustering of X-ray AGN as a function of host galaxy stellar mass
Published in Monthly notices of the Royal Astronomical Society (01-11-2021)“…ABSTRACT The co-evolution between central supermassive black holes (BHs), their host galaxies, and dark matter haloes is still a matter of intense debate…”
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