Search Results - "Simcoe, Robert"

Quasars and the Intergalactic Medium at Cosmic Dawn by Fan, Xiaohui, Bañados, Eduardo, Simcoe, Robert A

“…Quasars at cosmic dawn provide powerful probes of the formation and growth of the earliest supermassive black holes (SMBHs) in the Universe, their connections…”
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EIGER. II. First Spectroscopic Characterization of the Young Stars and Ionized Gas Associated with Strong Hβ and [O iii] Line Emission in Galaxies at z = 5–7 with JWST by Matthee, Jorryt, Mackenzie, Ruari, Simcoe, Robert A., Kashino, Daichi, Lilly, Simon J., Bordoloi, Rongmon, Eilers, Anna-Christina

“…Abstract We present emission-line measurements and physical interpretations for a sample of 117 [O iii ] emitting galaxies at z = 5.33–6.93, using the first…”
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An 800-million-solar-mass black hole in a significantly neutral Universe at a redshift of 7.5 by Bañados, Eduardo, Venemans, Bram P., Mazzucchelli, Chiara, Farina, Emanuele P., Walter, Fabian, Wang, Feige, Decarli, Roberto, Stern, Daniel, Fan, Xiaohui, Davies, Frederick B., Hennawi, Joseph F., Simcoe, Robert A., Turner, Monica L., Rix, Hans-Walter, Yang, Jinyi, Kelson, Daniel D., Rudie, Gwen C., Winters, Jan Martin

“…Observations of a quasar at redshift 7.54, when the Universe was just five per cent of its current age, suggest that the Universe was significantly neutral at…”
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The Carbon Content of Intergalactic Gas at z = 4.25 and Its Evolution toward z = 2.4 by Simcoe, Robert A

“…This paper presents ionization-corrected measurements of the carbon abundance in intergalactic gas at 4.0 < z < 4.5, using spectra of three bright quasars…”
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Similar star formation rate and metallicity variability time-scales drive the fundamental metallicity relation by Torrey, Paul, Vogelsberger, Mark, Hernquist, Lars, McKinnon, Ryan, Marinacci, Federico, Simcoe, Robert A, Springel, Volker, Pillepich, Annalisa, Naiman, Jill, Pakmor, Rüdiger, Weinberger, Rainer, Nelson, Dylan, Genel, Shy

“…Abstract The fundamental metallicity relation (FMR) is a postulated correlation between galaxy stellar mass, star formation rate (SFR), and gas-phase…”
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EIGER. I. A Large Sample of [O iii]-emitting Galaxies at 5.3 < z < 6.9 and Direct Evidence for Local Reionization by Galaxies by Kashino, Daichi, Lilly, Simon J., Matthee, Jorryt, Eilers, Anna-Christina, Mackenzie, Ruari, Bordoloi, Rongmon, Simcoe, Robert A.

“…Abstract We present a first sample of 117 [O iii ] λλ 4960, 5008–selected star-forming galaxies at 5.33 < z < 6.93 detected in JWST/NIRCam 3.5 μ m slitless…”
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Evidence for episodic black hole growth of reionization-era quasars observed with Magellan/FIRE by Bigwood, Leah, Eilers, Anna-Christina, Simcoe, Robert A

“…ABSTRACT Observations of high-redshift quasars hosting billion solar mass black holes at z ≳ 6 challenge our understanding of early supermassive black hole…”
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Detecting and Characterizing Young Quasars. I. Systemic Redshifts and Proximity Zone Measurements by Eilers, Anna-Christina, Hennawi, Joseph F., Decarli, Roberto, Davies, Frederick B., Venemans, Bram, Walter, Fabian, Bañados, Eduardo, Fan, Xiaohui, Farina, Emanuele P., Mazzucchelli, Chiara, Novak, Mladen, Schindler, Jan-Torge, Simcoe, Robert A., Wang, Feige, Yang, Jinyi

“…In a multiwavelength survey of 13 quasars at 5.8 z 6.5, which were preselected to be potentially young, we find five objects with extremely small proximity…”
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EIGER. III. JWST/NIRCam Observations of the Ultraluminous High-redshift Quasar J0100+2802 by Eilers, Anna-Christina, Simcoe, Robert A., Yue, Minghao, Mackenzie, Ruari, Matthee, Jorryt, Ďurovčíková, Dominika, Kashino, Daichi, Bordoloi, Rongmon, Lilly, Simon J.

“…Abstract We present the first rest-frame optical spectrum of a high-redshift quasar observed with JWST/NIRCam in Wide Field Slitless mode. The observed quasar,…”
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Little Red Dots: An Abundant Population of Faint Active Galactic Nuclei at z ∼ 5 Revealed by the EIGER and FRESCO JWST Surveys by Matthee, Jorryt, Naidu, Rohan P., Brammer, Gabriel, Chisholm, John, Eilers, Anna-Christina, Goulding, Andy, Greene, Jenny, Kashino, Daichi, Labbe, Ivo, Lilly, Simon J., Mackenzie, Ruari, Oesch, Pascal A., Weibel, Andrea, Wuyts, Stijn, Xiao, Mengyuan, Bordoloi, Rongmon, Bouwens, Rychard, van Dokkum, Pieter, Illingworth, Garth, Kramarenko, Ivan, Maseda, Michael V., Mason, Charlotte, Meyer, Romain A., Nelson, Erica J., Reddy, Naveen A., Shivaei, Irene, Simcoe, Robert A., Yue, Minghao

“…Abstract Characterizing the prevalence and properties of faint active galactic nuclei (AGNs) in the early Universe is key for understanding the formation of…”
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Heavy Element Absorption Systems at 5.0 < z < 6.8: Metal-poor Neutral Gas and a Diminishing Signature of Highly Ionized Circumgalactic Matter by Cooper, Thomas J., Simcoe, Robert A., Cooksey, Kathy L., Bordoloi, Rongmon, Miller, Daniel R., Furesz, Gabor, Turner, Monica L., Bañados, Eduardo

“…Ratios of different ions of the same element encode ionization information independently from relative abundances in quasar absorption line systems, crucial…”
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Estimating the Effective Lifetime of the z ∼ 6 Quasar Population from the Composite Proximity Zone Profile by Morey, Karna A., Eilers, Anna-Christina, Davies, Frederick B., Hennawi, Joseph F., Simcoe, Robert A.

“…Abstract The lifetime of quasars can be estimated by means of their proximity zone sizes, which are regions of enhanced flux blueward of the Ly α emission line…”
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BLACK HOLE MASS ESTIMATES AND EMISSION-LINE PROPERTIES OF A SAMPLE OF REDSHIFT z > 6.5 QUASARS by De Rosa, Gisella, VENEMANS, BRAM P, DeCarli, Roberto, Gennaro, Mario, Simcoe, Robert A, Dietrich, Matthias, Peterson, Bradley M, Walter, Fabian, Frank, Stephan, McMahon, Richard G, Hewett, Paul C, Mortlock, Daniel J, Simpson, Chris

“…We present the analysis of optical and near-infrared spectra of the only four z > 6.5 quasars known to date, discovered in the UKIDSS-LAS and VISTA-VIKING…”
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Predicting Quasar Continua near Lyα with Principal Component Analysis by Davies, Frederick B., Hennawi, Joseph F., Bañados, Eduardo, Simcoe, Robert A., Decarli, Roberto, Fan, Xiaohui, Farina, Emanuele P., Mazzucchelli, Chiara, Rix, Hans-Walter, Venemans, Bram P., Walter, Fabian, Wang, Feige, Yang, Jinyi

“…Abstract Measuring the proximity effect and the damping wing of intergalactic neutral hydrogen in quasar spectra during the epoch of reionization requires an…”
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EIGER. V. Characterizing the Host Galaxies of Luminous Quasars at z ≳ 6 by Yue, Minghao, Eilers, Anna-Christina, Simcoe, Robert A., Mackenzie, Ruari, Matthee, Jorryt, Kashino, Daichi, Bordoloi, Rongmon, Lilly, Simon J., Naidu, Rohan P.

“…Abstract We report JWST/NIRCam measurements of quasar host galaxy emissions and supermassive black hole (SMBH) masses for six quasars at 5.9 < z < 7.1 in the…”
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Compact [C ii] emitters around a C iv absorption complex at redshift 5.7 by Kashino, Daichi, Lilly, Simon J., Simcoe, Robert A., Bordoloi, Rongmon, Mackenzie, Ruari, Matthee, Jorryt, Eilers, Anna-Christina

“…The physical conditions of the circumgalactic medium are investigated by means of intervening absorption-line systems in the spectrum of background…”
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FIRE: A Facility Class Near-Infrared Echelle Spectrometer for the Magellan Telescopes by Simcoe, Robert A., Burgasser, Adam J., Schechter, Paul L., Fishner, Jason, Bernstein, Rebecca A., Bigelow, Bruce C., Pipher, Judith L., Forrest, William, McMurtry, Craig, Smith, Matthew J., Bochanski, John J.

“…ABSTRACT We describe the design, construction, and commissioning of FIRE, a 0.82-2.51 μ m echelle spectrograph for the 6.5 m Magellan Baade telescope. FIRE may…”
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A Metal-poor Damped Lyα System at Redshift 6.4 by Bañados, Eduardo, Rauch, Michael, Decarli, Roberto, Farina, Emanuele P., Hennawi, Joseph F., Mazzucchelli, Chiara, Venemans, Bram P., Walter, Fabian, Simcoe, Robert A., Prochaska, J. Xavier, Cooper, Thomas, Davies, Frederick B., Chen, Shi-Fan S.

“…Abstract We identify a strong Ly α damping wing profile in the spectrum of the quasar P183+05 at z  = 6.4386. Given the detection of several narrow metal…”
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A SURVEY OF Mg II ABSORPTION AT 2 < z < 6 WITH MAGELLAN/FIRE. I. SAMPLE AND EVOLUTION OF THE Mg II FREQUENCY by MATEJEK, Michael S, SIMCOE, Robert A

“…We present initial results from the first systematic survey for Mg II quasar absorption lines at z > 2.5. Using infrared spectra of 46 high-redshift quasars,…”
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Metal-enriched, subkiloparsec gas clumps in the circumgalactic medium of a faint z = 2.5 galaxy by Crighton, Neil H M, Hennawi, Joseph F, Simcoe, Robert A, Cooksey, Kathy L, Murphy, Michael T, Fumagalli, Michele, Prochaska, J Xavier, Shanks, Tom

“…We report the serendipitous detection of a 0.2 L*, Lyα emitting galaxy at redshift 2.5 at an impact parameter of 50 kpc from a bright background QSO sightline…”
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