Zobrazeno 1 - 10
of 3 279
pro vyhledávání: '"Ford K"'
Autor:
Wang, Yihan, Graham, Matthew J., Ford, K. E. Saavik, McKernan, Barry, Ryu, Taeho, Stern, Daniel
The phenomenon of changing-look (CL) behavior in active galactic nuclei (AGN) is characterized by dramatic changes in luminosity and/or emission line profiles over relatively short periods, ranging from months to years. The origin of CL-AGNs remains
Externí odkaz:
http://arxiv.org/abs/2406.12096
Tidal Disruption Events (TDEs) are routinely observed in quiescent galaxies, as stars from the nuclear star cluster are scattered into the loss cone of the central supermassive black hole (SMBH). TDEs are also expected to occur in Active Galactic Nuc
Externí odkaz:
http://arxiv.org/abs/2310.00020
Autor:
McKernan, B., Ford, K. E. S.
Merging black holes (BH) are expected to produce remnants with large dimensionless spin parameters ($a_{\rm spin} \sim 0.7$). However, gravitational wave (GW) observations with LIGO/Virgo suggest that merging BH are consistent with modestly positive
Externí odkaz:
http://arxiv.org/abs/2309.15213
Autor:
Saade, M. Lynne, Brightman, Murray, Stern, Daniel, Connor, Thomas, Djorgovski, S. G., D'Orazio, Daniel J., Ford, K. E. S., Graham, Matthew J., Haiman, Zoltan, Jun, Hyunsung D., Kammoun, Elias, Kraft, Ralph P., McKernan, Barry, Vikhlinin, Alexei, Walton, Dominic J.
We present analysis of NuSTAR X-ray observations of three AGN that were identified as candidate subparsec binary supermassive black hole (SMBH) systems in the Catalina Real-Time Transient Survey based on apparent periodicity in their optical light cu
Externí odkaz:
http://arxiv.org/abs/2304.06144
Autor:
Fagin, Joshua, Park, Ji Won, Best, Henry, Chan, James Hung-Hsu, Ford, K. E Saavik, Graham, Matthew J., Villar, V. Ashley, Ho, Shirley, O'Dowd, Matthew
Publikováno v:
The Astrophysical Journal, Volume 965, Number 2, April 2024
Quasars are bright and unobscured active galactic nuclei (AGN) thought to be powered by the accretion of matter around supermassive black holes at the centers of galaxies. The temporal variability of a quasar's brightness contains valuable informatio
Externí odkaz:
http://arxiv.org/abs/2304.04277
Autor:
Sivaramakrishnan, Anand, Tuthill, Peter, Lloyd, James P., Greenbaum, Alexandra Z., Thatte, Deepashri, Cooper, Rachel A., Vandal, Thomas, Kammerer, Jens, Sanchez-Bermudez, Joel, Pope, Benjamin J. S., Blakely, Dori, Albert, Loïc, Cook, Neil J., Johnstone, Doug, Martel, André R., Volk, Kevin, Soulain, Anthony, Artigau, Étienne, Lafrenière, David, Willott, Chris J., Parmentier, Sébastien, Ford, K. E. Saavik, McKernan, Barry, Vila, M. Begoña, Rowlands, Neil, Doyon, René, Desdoigts, Louis, Fullerton, Alexander W., De Furio, Matthew, Goudfrooij, Paul, Holfeltz, Sherie T., LaMassa, Stephanie, Maszkiewicz, Michael, Meyer, Michael R., Perrin, Marshall D., Pueyo, Laurent, Sahlmann, Johannes, Sohn, Sangmo Tony, Teixeira, Paula S.
The James Webb Space Telescope's Near Infrared Imager and Slitless Spectrograph (JWST-NIRISS) flies a 7-hole non-redundant mask (NRM), the first such interferometer in space, operating at 3-5 \micron~wavelengths, and a bright limit of $\simeq 4$ magn
Externí odkaz:
http://arxiv.org/abs/2210.17434
Autor:
Graham, Matthew J., McKernan, Barry, Ford, K. E. Saavik, Stern, Daniel, Djorgovski, S. G., Coughlin, Michael, Burdge, Kevin B., Bellm, Eric C., Helou, George, Mahabal, Ashish A., Masci, Frank J., Purdum, Josiah, Rosnet, Philippe, Rusholme, Ben
The accretion disks of active galactic nuclei (AGN) are promising locations for the merger of compact objects detected by gravitational wave (GW) observatories. Embedded within a baryon-rich, high density environment, mergers within AGN are the only
Externí odkaz:
http://arxiv.org/abs/2209.13004
Autor:
Breivik, Katelyn, Connolly, Andrew J., Ford, K. E. Saavik, Jurić, Mario, Mandelbaum, Rachel, Miller, Adam A., Norman, Dara, Olsen, Knut, O'Mullane, William, Price-Whelan, Adrian, Sacco, Timothy, Sokoloski, J. L., Villar, Ashley, Acquaviva, Viviana, Ahumada, Tomas, AlSayyad, Yusra, Alves, Catarina S., Andreoni, Igor, Anguita, Timo, Best, Henry J., Bianco, Federica B., Bonito, Rosaria, Bradshaw, Andrew, Burke, Colin J., de Campos, Andresa Rodrigues, Cantiello, Matteo, Caplar, Neven, Chandler, Colin Orion, Chan, James, da Costa, Luiz Nicolaci, Danieli, Shany, Davenport, James R. A., Fabbian, Giulio, Fagin, Joshua, Gagliano, Alexander, Gall, Christa, Camargo, Nicolás Garavito, Gawiser, Eric, Gezari, Suvi, Gomboc, Andreja, Gonzalez-Morales, Alma X., Graham, Matthew J., Gschwend, Julia, Guy, Leanne P., Holman, Matthew J., Hsieh, Henry H., Hundertmark, Markus, Ilić, Dragana, Ishida, Emille E. O., Jurkić, Tomislav, Kannawadi, Arun, Kosakowski, Alekzander, Kovačević, Andjelka B., Kubica, Jeremy, Lanusse, François, Lazar, Ilin, Levine, W. Garrett, Li, Xiaolong, Lu, Jing, Luna, Gerardo Juan Manuel, Mahabal, Ashish A., Malz, Alex I., Mao, Yao-Yuan, Medan, Ilija, Moeyens, Joachim, Nikolić, Mladen, Nikutta, Robert, O'Dowd, Matt, Olsen, Charlotte, Pearson, Sarah, Pedraza, Ilhuiyolitzin Villicana, Popinchalk, Mark, Popović, Luka C., Pritchard, Tyler A., Quint, Bruno C., Radović, Viktor, Ragosta, Fabio, Riccio, Gabriele, Riley, Alexander H., Rożek, Agata, Sánchez-Sáez, Paula, Sarro, Luis M., Saunders, Clare, Savić, Đorđe V., Schmidt, Samuel, Scott, Adam, Shirley, Raphael, Smotherman, Hayden R., Stetzler, Steven, Storey-Fisher, Kate, Street, Rachel A., Trilling, David E., Tsapras, Yiannis, Ustamujic, Sabina, van Velzen, Sjoert, Vázquez-Mata, José Antonio, Venuti, Laura, Wyatt, Samuel, Yu, Weixiang, Zabludoff, Ann
The Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) dataset will dramatically alter our understanding of the Universe, from the origins of the Solar System to the nature of dark matter and dark energy. Much of this research will depe
Externí odkaz:
http://arxiv.org/abs/2208.02781
Autor:
Nasim, Syeda S., Fabj, Gaia, Caban, Freddy, Secunda, Amy, Ford, K. E. Saavik, McKernan, Barry, Bellovary, Jillian M., Leigh, Nathan W. C., Lyra, Wladimir
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 522, Issue 4, July 2023, Pages 5393-5401
Stars and stellar remnants orbiting a supermassive black hole (SMBH) can interact with an active galactic nucleus (AGN) disc. Over time, prograde orbiters (inclination $i<90^{\circ}$) decrease inclination, as well as semi-major axis $(a)$ and eccentr
Externí odkaz:
http://arxiv.org/abs/2207.09540