Search Results - "Haggard, Daryl"

The Analogous Structure of Accretion Flows in Supermassive and Stellar Mass Black Holes: New Insights from Faded Changing-look Quasars by Ruan, John J., Anderson, Scott F., Eracleous, Michael, Green, Paul J., Haggard, Daryl, MacLeod, Chelsea L., Runnoe, Jessie C., Sobolewska, Malgosia A.

“…Despite their factor of ∼108 difference in black hole mass, several lines of evidence suggest possible similarities between black hole accretion flows in…”
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Chandra Study of the Proper Motion of HST-1 in the Jet of M87 by Thimmappa, Rameshan, Neilsen, Joey, Haggard, Daryl, Nowak, Mike, Markoff, Sera

“…Abstract The radio galaxy M87 is well known for its jet, which features a series of bright knots observable from radio to X-ray wavelengths. We analyze the…”
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KilonovAE: Exploring Kilonova Spectral Features with Autoencoders by Ford, N. M., Vieira, Nicholas, Ruan, John J., Haggard, Daryl

“…Abstract Kilonovae are likely a key site of heavy r -process element production in the Universe, and their optical/infrared spectra contain insights into both…”
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Simulation-based Inference of Radio Millisecond Pulsars in Globular Clusters by Berteaud, Joanna, Eckner, Christopher, Calore, Francesca, Clavel, Maïca, Haggard, Daryl

“…Abstract Millisecond pulsars (MSPs) are abundant in globular clusters (GCs), which offer favorable environments for their creation. While the advent of recent,…”
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Signatures of Massive Black Hole Merger Host Galaxies from Cosmological Simulations. I. Unique Galaxy Morphologies in Imaging by Bardati, Jaeden, Ruan, John J., Haggard, Daryl, Tremmel, Michael

“…Abstract Low-frequency gravitational-wave experiments such as the Laser Interferometer Space Antenna and pulsar timing arrays are expected to detect individual…”
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Spectroscopic r-process Abundance Retrieval for Kilonovae. II. Lanthanides in the Inferred Abundance Patterns of Multicomponent Ejecta from the GW170817 Kilonova by Vieira, Nicholas, Ruan, John J., Haggard, Daryl, Ford, Nicole M., Drout, Maria R., Fernández, Rodrigo

“…Abstract In kilonovae, freshly synthesized r -process elements imprint features on optical spectra, as observed in AT2017gfo, the counterpart to the GW170817…”
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Spectroscopic r-Process Abundance Retrieval for Kilonovae. I. The Inferred Abundance Pattern of Early Emission from GW170817 by Vieira, Nicholas, Ruan, John J., Haggard, Daryl, Ford, Nicole, Drout, Maria R., Fernández, Rodrigo, Badnell, N. R.

“…Abstract Freshly synthesized r -process elements in kilonovae ejecta imprint absorption features on optical spectra, as observed in the GW170817 binary neutron…”
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A Deep CFHT Optical Search for a Counterpart to the Possible Neutron Star-Black Hole Merger GW190814 by Vieira, Nicholas, Ruan, John J., Haggard, Daryl, Drout, Maria R., Nynka, Melania C., Boyce, Hope, Spekkens, Kristine, Safi-Harb, Samar, Carlberg, Raymond G., Fernández, Rodrigo, Piro, Anthony L., Afsariardchi, Niloufar, Moon, Dae-Sik

“…We present a wide-field optical imaging search for electromagnetic counterparts to the likely neutron star-black hole (NS-BH) merger GW190814/S190814bv. This…”
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Explaining the GWSkyNet-Multi Machine Learning Classifier Predictions for Gravitational-wave Events by Raza, Nayyer, Chan, Man Leong, Haggard, Daryl, Mahabal, Ashish, McIver, Jess, Abbott, Thomas C., Buffaz, Eitan, Vieira, Nicholas

“…Abstract GWSkyNet-Multi is a machine learning model developed for the classification of candidate gravitational-wave events detected by the LIGO and Virgo…”
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Multistructured Accretion Flow of Sgr A. II. Signatures of a Cool Accretion Disk in Hydrodynamic Simulations of Stellar Winds by Balakrishnan, Mayura, Russell, Christopher M. P., Corrales, Lia, Calderón, Diego, Cuadra, Jorge, Haggard, Daryl, Markoff, Sera, Neilsen, Joey, Nowak, Michael, Wang, Q. Daniel, Baganoff, Frederick

“…Abstract Hydrodynamic simulations of the stellar winds from Wolf–Rayet stars within the Galactic center can provide predictions for the X-ray spectrum of the…”
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Multistructured Accretion Flow of Sgr A. I. Examination of a Radiatively Inefficient Accretion Flow Model by Balakrishnan, Mayura, Corrales, Lia, Markoff, Sera, Nowak, Michael, Haggard, Daryl, Wang, Q. Daniel, Neilsen, Joey, Russell, Christopher M. P., Calderón, Diego, Cuadra, Jorge, Baganoff, Frederick

“…Abstract The extreme low-luminosity supermassive black hole Sgr A* provides a unique laboratory in which to test models of radiatively inefficient accretion…”
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Radio Scrutiny of the X-Ray-weak Tail of Low-mass Active Galactic Nuclei: A Novel Signature of High-Eddington Accretion? by Paul, Jeremiah D., Plotkin, Richard M., Brandt, W. N., Ellis, Christopher H., Gallo, Elena, Greene, Jenny E., Ho, Luis C., Kimball, Amy E., Haggard, Daryl

“…Abstract The supermassive black holes ( M BH ∼ 10 6 –10 10 M ⊙ ) that power luminous active galactic nuclei (AGNs), i.e., quasars, generally show a correlation…”
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GWSkyNet. II. A Refined Machine-learning Pipeline for Real-time Classification of Public Gravitational Wave Alerts by Chan, Man Leong, McIver, Jess, Mahabal, Ashish, Messick, Cody, Haggard, Daryl, Raza, Nayyer, Lecoeuche, Yannick, Sutton, Patrick J., Ewing, Becca, Di Renzo, Francesco, Cabero, Miriam, Ng, Raymond, Coughlin, Michael W., Ghosh, Shaon, Godwin, Patrick

“…Electromagnetic follow-up observations of gravitational wave events offer critical insights and provide significant scientific gain from this new class of…”
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Chandra Spectral and Timing Analysis of Sgr A's Brightest X-Ray Flares by Haggard, Daryl, Nynka, Melania, Mon, Brayden, Cruz Hernandez, Noelia de la, Nowak, Michael, Heinke, Craig, Neilsen, Joseph, Dexter, Jason, Fragile, P. Chris, Baganoff, Fred, Bower, Geoffrey C., Corrales, Lia R., Zelati, Francesco Coti, Degenaar, Nathalie, Markoff, Sera, Morris, Mark R., Ponti, Gabriele, Rea, Nanda, Wilms, Jöern, Yusef-Zadeh, Farhad

“…We analyze the two brightest Chandra X-ray flares detected from Sagittarius A*, with peak luminosities more than 600× and 245× greater than the quiescent X-ray…”
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Monitoring observations of SMC X-1’s excursions (MOOSE)  – II. A new excursion accompanies spin-up acceleration by Hu, Chin-Ping, Dage, Kristen C, Clarkson, William I, Brumback, McKinley, Charles, Philip A, Haggard, Daryl, Hickox, Ryan C, Mihara, Tatehiro, Bahramian, Arash, Karam, Rawan, Athukoralalage, Wasundara, Altamirano, Diego, Neilsen, Joey, Kennea, Jamie

“…ABSTRACT SMC X-1 is a high-mass X-ray binary showing superorbital modulation with an unstable period. Previous monitoring shows three excursion events in…”
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Gemini Imaging of the Host Galaxies of Changing-look Quasars by Charlton, Paul J. L., Ruan, John J., Haggard, Daryl, Anderson, Scott F., Eracleous, Michael, MacLeod, Chelsea L., Runnoe, Jessie C.

“…Changing-look (CL) quasars are a newly discovered class of luminous active galactic nuclei that undergo rapid ( 10 yr) transitions between Type 1 and Type…”
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Simultaneous Monitoring of X-Ray and Radio Variability in Sagittarius A by Capellupo, Daniel M., Haggard, Daryl, Choux, Nicolas, Baganoff, Fred, Bower, Geoffrey C., Cotton, Bill, Degenaar, Nathalie, Dexter, Jason, Falcke, Heino, Fragile, P. Chris, Heinke, Craig O., Law, Casey J., Markoff, Sera, Neilsen, Joey, Ponti, Gabriele, Rea, Nanda, Yusef-Zadeh, Farhad

“…Monitoring of Sagittarius A* from X-ray to radio wavelengths has revealed structured variability-including X-ray flares-but it is challenging to establish…”
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Prospects for Time-Domain and Multi-Messenger Science with AXIS by Arcodia, Riccardo, Bauer, Franz E., Cenko, S. Bradley, Dage, Kristen C., Haggard, Daryl, Ho, Wynn C. G., Kara, Erin, Koss, Michael, Liu, Tingting, Mallick, Labani, Negro, Michela, Pradhan, Pragati, Quirola-Vásquez, J., Reynolds, Mark T., Ricci, Claudio, Rothschild, Richard E., Sridhar, Navin, Troja, Eleonora, Yao, Yuhan

“…The Advanced X-ray Imaging Satellite (AXIS) promises revolutionary science in the X-ray and multi-messenger time domain. AXIS will leverage excellent spatial…”
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Speedy stars blow the cover of hidden black hole by Haggard, Daryl, Cool, Adrienne

“…Fast-moving stars have been discovered in the middle of the nearby star cluster ω Centauri using two decades of Hubble Space Telescope imaging. The stars offer…”
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Black hole goes with the flow by Haggard, Daryl

“…First you would hear the sound of each drip, and then you would hear an echo when each sound bounces off the cave walls. The authors found that particular…”
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