302 citations · 3k across the 71 of their papers we have counts for
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The impact of faint AGN discovered by JWST on reionization
Shikhar Asthana, Martin G. Haehnelt, Girish Kulkarni +4
The relative contribution of emission from stellar sources and accretion onto supermassive black holes to reionization has been brought into focus again by the apparent high abunda…
E-XQR-30: The evolution of MgII, CII and OI across 2<z<6
Alma Maria Sebastian, Emma Ryan-Weber, Rebecca L. Davies +12
Intervening metal absorbers in quasar spectra at can be used as probes to study the chemical enrichment of the Universe during the Epoch of Reionization (EoR). This work pr…
A SPectroscopic survey of biased halos In the Reionization Era (ASPIRE): Impact of Galaxies on the CGM Metal Enrichment at z > 6 Using the JWST and VLT
Siwei Zou, Zheng Cai, Feige Wang +27
We characterize the multiphase circumgalactic medium and galaxy properties at z = 6.0-6.5 in four quasar fields from the James Webb Space Telescope A SPectroscopic survey of biased…
JWST observations of galaxy damping wings during reionization interpreted with cosmological simulations
Laura C. Keating, James S. Bolton, Fergus Cullen +3
Spectra of the highest redshift galaxies taken with JWST are now allowing us to see into the heart of the reionization epoch. Many of these observed galaxies exhibit strong damping…
New quasar proximity zone size measurements at using the enlarged XQR-30 sample
Sindhu Satyavolu, Anna-Christina Eilers, Girish Kulkarni +15
Proximity zones of high-redshift quasars are unique probes of their central supermassive black holes as well as the intergalactic medium in the last stages of reionization. We pres…
A SPectroscopic survey of biased halos In the Reionization Era (ASPIRE): JWST Reveals a Filamentary Structure around a z=6.61 Quasar
Feige Wang, Jinyi Yang, Joseph F. Hennawi +56
We present the first results from the JWST ASPIRE program (A SPectroscopic survey of biased halos In the Reionization Era). This program represents an imaging and spectroscopic sur…
A SPectroscopic survey of biased halos In the Reionization Era (ASPIRE): A First Look at the Rest-frame Optical Spectra of Quasars Using JWST
Jinyi Yang, Feige Wang, Xiaohui Fan +53
Studies of rest-frame optical emission in quasars at have historically been limited by the wavelengths accessible by ground-based telescopes. The James Webb Space Telescope (…
The need for obscured supermassive black hole growth to explain quasar proximity zones in the epoch of reionization
Sindhu Satyavolu, Girish Kulkarni, Laura C. Keating +1
Proximity zones of high-redshift quasars are unique probes of supermassive black hole formation, but simultaneously explaining proximity zone sizes and black hole masses has proved…
Prospects for Observing the low-density Cosmic Web in Lyman-alpha Emission
Joris Witstok, Ewald Puchwein, Girish Kulkarni +2
Mapping the intergalactic medium (IGM) in Lyman- emission would yield unprecedented tomographic information on the large-scale distribution of baryons and potentially provide ne…
Modelling the observed luminosity function and clustering evolution of Lyman- emitters: growing evidence for late reionization
Lewis H. Weinberger, Martin G. Haehnelt, Girish Kulkarni
We model the high redshift (z > 5) Lyman- emitting (LAE) galaxy population using the empirical rest-frame equivalent width distribution. We calibrate to the observed luminosity…
Evolution of the AGN UV luminosity function from redshift 7.5
Girish Kulkarni, Gábor Worseck, Joseph F. Hennawi
Determinations of the UV luminosity function of AGN at high redshifts are important for constraining the AGN contribution to reionization and understanding the growth of supermassi…
Lyman-alpha emitters gone missing: the different evolution of the bright and faint populations
Lewis H. Weinberger, Girish Kulkarni, Martin G. Haehnelt +2
We model the transmission of the Lyman-alpha line through the circum- and intergalactic media around dark matter haloes expected to host Lyman-alpha emitters (LAEs) at z > 5.7, usi…
Predictions and sensitivity forecasts for reionization-era [C II] line intensity mapping
Sebastian Dumitru, Girish Kulkarni, Guilaine Lagache +1
Observations of the high-redshift Universe using the 21 cm line of neutral hydrogen and complimentary emission lines from the first galaxies promise to open a new door for our unde…
Chemical enrichment of stars due to accretion from ISM during the Galaxy's assembly
Sijing Shen, Girish Kulkarni, Piero Madau +1
Using the Eris zoom-in cosmological simulation of assembly of a Milky Way analog, we study chemical enrichment of stars due to accretion of metal-enriched gas from the interstellar…
Constraints on the evolution of the relationship between HI mass and halo mass in the last 12 Gyr
Hamsa Padmanabhan, Girish Kulkarni
The neutral hydrogen (HI) content of dark matter haloes forms an intermediate state in the baryon cycle that connects the hot shock-heated gas and cold star-forming gas in haloes.…
Models of the Cosmological 21 cm Signal from the Epoch of Reionization Calibrated with Lyman-alpha and CMB Data
Girish Kulkarni, Tirthankar Roy Choudhury, Ewald Puchwein +1
We present here 21 cm predictions from high dynamic range simulations for a range of reionization histories that have been tested against available Lyman-alpha and CMB data. We ass…
Radio Crickets: Chirping Jets from Black Hole Binaries Entering their Gravitational Wave Inspiral
Girish Kulkarni, Abraham Loeb
We study a novel electromagnetic signature of supermassive black hole binaries whose inspiral starts being dominated by gravitational wave (GW) emission. Recent simulations suggest…