Search Results - "Ruan, John J."

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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Changing-look Quasar Candidates: First Results from Follow-up Spectroscopy of Highly Optically Variable Quasars by MacLeod, Chelsea L., Green, Paul J., Anderson, Scott F., Bruce, Alastair, Eracleous, Michael, Graham, Matthew, Homan, David, Lawrence, Andy, LeBleu, Amy, Ross, Nicholas P., Ruan, John J., Runnoe, Jessie, Stern, Daniel, Burgett, William, Chambers, Kenneth C., Kaiser, Nick, Magnier, Eugene, Metcalfe, Nigel

“…Active galactic nuclei (AGNs) that show strong rest-frame optical/UV variability in their blue continuum and broad line emission are classified as…”
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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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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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SEARCHING FOR BINARY SUPERMASSIVE BLACK HOLES VIA VARIABLE BROAD EMISSION LINE SHIFTS: LOW BINARY FRACTION by Wang, Lile, Greene, Jenny E., Ju, Wenhua, Rafikov, Roman R., Ruan, John J., Schneider, Donald P.

“…ABSTRACT Supermassive black hole binaries (SMBHs) are expected to result from galaxy mergers, and thus are natural byproducts (and probes) of hierarchical…”
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Probing the Origin of Changing-look Quasar Transitions with Chandra by Yang, Qian, Green, Paul J., MacLeod, Chelsea L., Plotkin, Richard M., Anderson, Scott F., Bieryla, Allyson, Civano, Francesca, Eracleous, Michael, Graham, Matthew, Ruan, John J., Runnoe, Jessie, Zhao, Xiurui

“…Abstract Extremely variable quasars can also show strong changes in broad-line emission strength and are known as changing-look quasars (CLQs). To study the…”
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Detection of Time Lags between Quasar Continuum Emission Bands Based On Pan-STARRS Light Curves by Jiang (姜燕飞), Yan-Fei, Green, Paul J., Greene, Jenny E., Morganson, Eric, Shen, Yue, Pancoast, Anna, MacLeod, Chelsea L., Anderson, Scott F., Brandt, W. N., Grier, C. J., Rix, H.-W., Ruan, John J., Protopapas, Pavlos, Scott, Caroline, Burgett, W. S., Hodapp, K. W., Huber, M. E., Kaiser, N., Kudritzki, R. P., Magnier, E. A., Metcalfe, N., Tonry, J. T., Wainscoat, R. J., Waters, C.

“…We study the time lags between the continuum emission of quasars at different wavelengths, based on more than four years of multi-band (g, r, i, z) light…”
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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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Erratum: “Changing-Look Quasar Candidates: First Results from Follow-up Spectroscopy of Highly Optically Variable Quasars” (2019, ApJ, 874, 8) by MacLeod, Chelsea L., Green, Paul J., Anderson, Scott F., Bruce, Alastair, Eracleous, Michael, Graham, Matthew, Homan, David, Lawrence, Andy, LeBleu, Amy, Ross, Nicolas P., Ruan, John J., Runnoe, Jessie, Stern, Daniel, Burgett, William, Chambers, Kenneth C., Kaiser, Nick, Magnier, Eugene, Metcalfe, Nigel

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Are blazars above the blazar sequence a significant source of IceCube neutrinos? by Savard, Katherine, Ruan, John J, Haggard, Daryl

“…ABSTRACT The recent association of two flaring blazars (TXS 0506+056 and 3HSP J095507.9+355101) with IceCube neutrinos strongly suggests that blazars are at…”
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EVIDENCE FOR LARGE TEMPERATURE FLUCTUATIONS IN QUASAR ACCRETION DISKS FROM SPECTRAL VARIABILITY by Ruan, John J, Anderson, Scott F, Dexter, Jason, Agol, Eric

“…The well-known bluer-when-brighter trend observed in quasar variability is a signature of the complex processes in the accretion disk and can be a probe of the…”
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DETECTION OF QUASAR FEEDBACK FROM THE THERMAL SUNYAEV-ZEL'DOVICH EFFECT IN PLANCK by Ruan, John J., McQuinn, Matthew, Anderson, Scott F.

“…ABSTRACT Poorly understood feedback processes associated with highly luminous black hole accretion in quasars may dramatically affect the properties of their…”
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A Mote in Andromeda's Disk: A Misidentified Periodic AGN behind M31 by Dorn-Wallenstein, Trevor, Levesque, Emily M., Ruan, John J.

“…We identify an object previously thought to be a star in the disk of M31, J0045+41, as a background active galactic nucleus (AGN) seen through a low-absorption…”
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Now you see it, now you don't: the disappearing central engine of the quasar J1011+5442 by Runnoe, Jessie C., Cales, Sabrina, Ruan, John J., Eracleous, Michael, Anderson, Scott F., Shen, Yue, Green, Paul J., Morganson, Eric, LaMassa, Stephanie, Greene, Jenny E., Dwelly, Tom, Schneider, Donald P., Merloni, Andrea, Georgakakis, Antonis, Roman-Lopes, A.

“…We report the discovery of a new ‘changing-look' quasar, SDSS J101152.98+544206.4, through repeat spectroscopy from the Time Domain Spectroscopic Survey. This…”
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TOWARD AN UNDERSTANDING OF CHANGING-LOOK QUASARS: AN ARCHIVAL SPECTROSCOPIC SEARCH IN SDSS by Ruan, John J., Anderson, Scott F., Cales, Sabrina L., Eracleous, Michael, Green, Paul J., Morganson, Eric, Runnoe, Jessie C., Shen, Yue, Wilkinson, Tessa D., Blanton, Michael R., Dwelly, Tom, Georgakakis, Antonis, Greene, Jenny E., LaMassa, Stephanie M., Merloni, Andrea, Schneider, Donald P.

“…ABSTRACT The uncertain origin of the recently discovered "changing-look" quasar phenomenon-in which a luminous quasar dims significantly to a quiescent state…”
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The Time Domain Spectroscopic Survey: Changing-look Quasar Candidates from Multi-epoch Spectroscopy in SDSS-IV by Green, Paul J., Pulgarin-Duque, Lina, Anderson, Scott F., MacLeod, Chelsea L., Eracleous, Michael, Ruan, John J., Runnoe, Jessie, Graham, Matthew, Roulston, Benjamin R., Schneider, Donald P., Ahlf, Austin, Bizyaev, Dmitry, Brownstein, Joel R., del Casal, Sonia Joesephine, Dodd, Sierra A., Hoover, Daniel, Matt, Cayenne, Merloni, Andrea, Pan, Kaike, Ramirez, Arnulfo, Ridder, Margaret, Moseley, Serena

“…Abstract Active galactic nuclei (AGN) can vary significantly in their rest-frame optical/UV continuum emission, and with strong associated changes in broad…”
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The SDSS–2MASS–WISE 10-dimensional stellar colour locus by Davenport, James R. A., Ivezić, Željko, Becker, Andrew C., Ruan, John J., Hunt-Walker, Nicholas M., Covey, Kevin R., Lewis, Alexia R., AlSayyad, Yusra, Anderson, Lauren M.

“…We present the fiducial main-sequence stellar locus traced by 10 photometric colours observed by Sloan Digital Sky Survey (SDSS), Two Micron All Sky Survey…”
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