Browsing by Author "Kim, Sam"
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- ItemA comprehensive view of a strongly lensedplanck-associated submillimeter galaxy.(2012) Fu, Hai; Kim, Sam; Jullo, E.; Cooray, Asantha; Bussmann, R. S.; Ivison, R. J.; Pérez-Fournon, I.; Djorgovski, S. G.; Scoville, Nick Z.; Yan, L.; Riechers, D. A.
- ItemA detailed gravitational lens model based on submillimeter array and keck adaptive optics imaging of a Herschel-atlas submillimeter galaxy AT z = 4.243.(2012) Bussmann, R. S.; Kim, Sam; Gurwell, M. A.; Fu, Hai; Smith, D. J. B.; Dye, S.; Auld, R.; Baes, M.; Baker, A. J.; Bonfield, D.; Cava, A.
- ItemA Revised Host Galaxy Association for GRB 020819B : A High-Redshift Dusty Starburst, Not a Low-Redshift Gas-Poor Spiral.(2016) Perley, Daniel A.; Kim, Sam; Krühler, Thomas; Schady, Patricia; Michalowski, Michal J.; Thöne, Christina C.; Petry, Dirk; Graham, John F.; Greiner, Jochen; Klose,Sylvio; Schulze, Steve.
- ItemALMA and GMRT Constraints on the Off-axis Gamma-Ray Burst 170817A from the Binary Neutron Star Merger GW170817.(2017) Kim, Sam; González López, Jorge; Bauer, Franz Erik; Schulze, Steve.; Resmi, L.; Higgins, A. B.; Ishwara-Chandra, C. H.; Gregorio-Monsalvo, I. de; Pasquale, M. de; Ugarte Postigo, A. de; Kann, D. A.; Kim, Sam; González López, Jorge; Bauer, Franz Erik; Schulze, Steve.; Resmi, L.; Higgins, A. B.; Ishwara-Chandra, C. H.; Gregorio-Monsalvo, I. de; Pasquale, M. de; Ugarte Postigo, A. de; Kann, D. A.
- ItemCosmic evolution and metal aversion in superluminous supernova host galaxies(2018) Schulze, Steve; Krühler, T.; Leloudas, G.; Gorosabel, J.; Mehner, A.; Buchner, J.; Kim, Sam; Ibar, Edo; Amorín, Ricardo; Herrero Illana, Rubén; Anderson, Joseph; Bauer, Franz Erik
- ItemDelayed appearance and evolution of coronal lines in the TDE AT2019qiz(Oxford University Press, 2023) Short, P.; Lawrence, A.; Nicholl, M.; Ward, M.; Reynolds, T. M.; Mattila, S.; Yin, C.; Arcavi, I; Carnall, A.; Charalampopoulos, P.; Gromadzki, M.; Jonker, P. G.; Kim, Sam; Leloudas, G.; Mandel, I; Onori, F.; Pursiainen, M.; Schulze, S.; Villforth, C.; Wevers, T.Tidal disruption events (TDEs) occur when a star gets torn apart by a supermassive black hole as it crosses its tidal radius. We present late-time optical and X-ray observations of the nuclear transient AT2019qiz, which showed the typical signs of an optical-UV transient class commonly believed to be TDEs. Optical spectra were obtained 428, 481, and 828 rest-frame days after optical light-curve peak, and a UV/X-ray observation coincided with the later spectrum. The optical spectra show strong coronal emission lines, including [Fe vii], [Fe x], [Fe xi], and [Fe xiv]. The Fe lines rise and then fall, except [Fe xiv] that appears late and rises. We observe increasing flux of narrow H & alpha; and H & beta; and a decrease in broad H & alpha; flux. The coronal lines have full width at half-maximum ranging from & SIM;150-300 km s(-1), suggesting they originate from a region between the broad- and narrow-line emitting gas. Between the optical flare and late-time observation, the X-ray spectrum softens dramatically. The 0.3-1 keV X-ray flux increases by a factor of & SIM;50, while the hard X-ray flux decreases by a factor of & SIM;6. Wide-field Infrared Survey Explorer fluxes also rose over the same period, indicating the presence of an infrared echo. With AT2017gge, AT2019qiz is one of two examples of a spectroscopically confirmed optical-UV TDE showing delayed coronal line emission, supporting speculations that Extreme Coronal Line Emitters in quiescent galaxies can be echos of unobserved past TDEs. We argue that the coronal lines, narrow lines, and infrared emission arise from the illumination of pre-existing material likely related to either a previous TDE or active galactic nucleus activity.
- ItemDiscovery of a Multiply-Lensed Submillimeter Galaxy in Early HerMES Herschel/SPIRE Data(2011) Conley, A.; Kim, Sam; Cooray, Asantha; Vieira, J. D.; González Solares, E. A.; Aguirre, J. E.; Amblard, A.; Auld, R.; Baker, A. J.; Beelen, A.; Blain, A.
- ItemDynamical structure of the molecular interstellar medium in an extremely bright, multiply lensed z 3 submillimeter galaxy discovered with Herschel.(2011) Riechers, Dominik A.; Kim, Sam; Cooray, Asantha; Omont, A.; Neri, R.; Harris, A. I.; Baker, A. J.; Cox, P.; Frayer, D. T.; Carpenter, J. M.; Auld, R.
- ItemFrontier Fields: Combining HST, VLT, and Spitzer data to explore the z similar to 8 Universe behind the lensing cluster MACSJ0416.1-2403(2015) Laporte, Nicolás; Kim, Sam; Bauer, Franz Erik; Infante Lira, Leopoldo; Laporte, Nicolás; Kim, Sam; Bauer, Franz Erik; Infante Lira, Leopoldo
- ItemHerMES: Candidate Gravitationally Lensed Galaxies and Lensing Statistics at Submillimeter Wavelengths.(2013) Wardlow, Julie L.; Kim, Sam; Cooray, Asantha; Bernardis, Francesco De; Amblard, A.; Arumugam, V.; Aussel, H.; Baker, A. J.; Bethermin, M.; Blundell, R.; Bock, J.
- ItemHerschel-ATLAS : deep HST/WFC3 imaging of strongly lensed submillimetre galaxies.(2014) Negrello, Mattia; Kim, Sam; Hopwood, R.; Dye, S.; Cunha, E. da; Serjeant, S.; Fritz, J.; Rowlands, K.; Fleuren, S.; Bussmann, R. S.; Cooray, Asantha
- ItemLens Models of Herschel-Selected Galaxies From High-Resolution Near-IR Observations.(2014) Calanog, J.; Kim, Sam; Fu, Hai; Cooray, Asantha; Wardlow, Julie L.; Ma, B.; Amber, S.; Baker, A. J.; Baes, M.; Bock, J.; Bourne, N.
- ItemLong-term x-ray variability of typical active galactic nuclei in the distant universe.(2016) Yang, G.; Kim, Sam; Brandt, W N.; Bauer, Franz Erik; Schulze, Steve.; Luo, B.; Xue, Y. Q.; Sun, M. Y.; Zheng, X. C.; Paolillo, M.; Shemmer, O.
- ItemMeasurements of co redshifts with Z-spec for lensed submillimeter galaxies discovered in the H-atlas survey.(2012) Lupu, R. E.; Kim, Sam; Scott, K. S.; Aguirre, J. E.; Aretxaga, I.; Auld, R.; Barton, E.; Beelen, A.; Bertoldi, F.; Bock, J. J.; Bonfield, D.
- ItemMid-infrared properties of disk averaged observations of earth with airs.(2009) Hearty, Thomas; Kim, Sam; Song, Inseok; Tinetti, Giovanna
- ItemModeling of the HERMES submillimeter source lensed by a dark matter dominated foreground group of galaxies.(2011) Gavazzi, R.; Kim, Sam; Cooray, Asantha; Conley, A.; Aguirre, J. E.; Amblard, A.; Auld, R.; Beelen, A.; Blain, A.; Blundell, R.; Bock, J.
- ItemMulti-messenger Observations of a Binary Neutron Star Merger.(2017) Abbott, B. P.; Kim, Sam; Bauer, Franz Erik; González López, Jorge; Abbott, R.; Abbott, T. D.; Acernese, F.; Ackley, K.; Adams Wrighton, Christopher William; Adams, T.; Addesso, P.; Abbott, B. P.; Kim, Sam; Bauer, Franz Erik; González López, Jorge; Abbott, R.; Abbott, T. D.; Acernese, F.; Ackley, K.; Adams Wrighton, Christopher William; Adams, T.; Addesso, P.; Abbott, B. P.; Kim, Sam; Bauer, Franz Erik; González López, Jorge; Abbott, R.; Abbott, T. D.; Acernese, F.; Ackley, K.; Adams Wrighton, Christopher William; Adams, T.; Addesso, P.; Abbott, B. P.; Kim, Sam; Bauer, Franz Erik; González López, Jorge; Abbott, R.; Abbott, T. D.; Acernese, F.; Ackley, K.; Adams Wrighton, Christopher William; Adams, T.; Addesso, P.
- ItemNew debris disk candidates around 49 nearby stars.(2010) Koerner, D. W.; Kim, Sam; Trilling, D. E.; Larson, H.; Cotera, A.; Stapelfeldt, K. R.; Wahhaj, Z.; Fajardo-Acosta, S.; Padgett, D.; Backman, D.
- ItemNine lensed quasars and quasar pairs discovered through spatially extended variability in Pan-STARRS(2024) Dux, Frederic; Lemon, Cameron; Courbin, Frederic; Neira, Favio; Anguita, Timo; Galan, Aymeric; Kim, Sam; Hempel, Maren; Hempel, Angela; Lachaume, RegisWe present the proof of concept of a method for finding strongly lensed quasars using their spatially extended photometric variability through difference imaging in cadenced imaging survey data. We applied the method to Pan-STARRS, starting with an initial selection of 14 107 Gaia multiplets with quasar-like infrared colours from WISE. We identified 229 candidates showing notable spatially extended variability during the Pan-STARRS survey period. These include 20 known lenses and an additional 12 promising candidates for which we obtained long-slit spectroscopy follow-up. This process resulted in the confirmation of four doubly lensed quasars, four unclassified quasar pairs, and one projected quasar pair. Only three are pairs of stars or quasar + star projections. The false-positive rate accordingly is 25%. The lens separations are between 0.81 '' and 1.24 '', and the source redshifts lie between z = 1 :47 and z = 2 :46. Three of the unclassified quasar pairs are promising dual-quasar candidates with separations ranging from 6.6 to 9.3 kpc. We expect that this technique is a particularly e fficient way to select lensed variables in the upcoming Rubin-LSST, which will be crucial given the expected limitations for spectroscopic follow-up.
- ItemOptical survey with kmtnet for dusty star-forming galaxies in the AKARI Deep Field South(2016) Jeong, Woong-Seob; Kim, Sam; Ko, Kyeongyeon; Kim, Minjin; Ko, Jongwan; Pyo, Jeonghyun; Kim, Seong Jin; Kim, Taehyun; Seo, Hyun Jong; Park, Won-Kee; Park, Sung-Joon