Zobrazeno 1 - 10
of 2 652
pro vyhledávání: '"Harrison, F"'
Autor:
Bierschenk, M., Ricci, C., Temple, M. J., Satyapal, S., Cann, J., Xie, Y., Diaz, Y., Ichikawa, K., Koss, M. J., Bauer, F. E., Rojas, A., Kakkad, D., Tortosa, A., Ricci, F., Mushotzky, R., Kawamuro, T., Gupta, K. K., Trakhtenbrot, B., Chang, C. S., Riffel, R., Oh, K., Harrison, F., Powell, M., Stern, D., Urry, C. M.
We analyze the Spitzer spectra of 140 active galactic nuclei (AGN) detected in the hard X-rays (14-195 keV) by the Burst Alert Telescope (BAT) on board Swift. This sample allows us to probe several orders of magnitude in black hole masses ($10^6-10^9
Externí odkaz:
http://arxiv.org/abs/2409.17334
Autor:
Walton, D. J., Bachetti, M., Kosec, P., Furst, F., Pinto, C., Roberts, T. P., Soria, R., Stern, D., Alston, W. N., Brightman, M., Earnshaw, H. P., Fabian, A. C., Harrison, F. A., Middleton, M. J., Sathyaprakash, R.
We present a series of five new broadband X-ray observations of the ultraluminous X-ray source Holmberg IX X-1, performed by $XMM$-$Newton$ and $NuSTAR$ in coordination. The first three of these show high soft X-ray fluxes but a near total collapse o
Externí odkaz:
http://arxiv.org/abs/2409.12241
Autor:
de la Parra, P. V., Kiehlmann, S., Mroz, P., Readhead, A. C. S., Synani, A., Begelman, M. C., Blandford, R. D., Ding, Y., Harrison, F., Liodakis, I., Max-Moerbeck, W., Pavlidou, V., Reeves, R., Vallisneri, M., Aller, M. F., Graham, M. J., Hovatta, T., Lawrence, C. R., Lazio, T. J. W., Mahabal, A. A., Molina, B., O'Neill, S., Pearson, T. J., Ravi, V., Tassis, K., Zensus, J. A.
Owens Valley Radio Observatory (OVRO) observations of supermassive black hole binary (SMBHB) candidate PKS~2131$-$021 revealed, for the first time, six likely characteristics of the phenomenology exhibited by SMBHB in blazars, of which the most unexp
Externí odkaz:
http://arxiv.org/abs/2408.02645
Autor:
Scheirich, Peter, Pravec, Petr, Meyer, Alex J., Agrusa, Harrison F., Richardson, Derek C., Chesley, Steven R., Naidu, Shantanu P., Thomas, Cristina, Moskovitz, Nicholas A.
Publikováno v:
The Planetary Science Journal, 5(1), 17 (2024)
The NASA Double Asteroid Redirection Test (DART) spacecraft successfully impacted the Didymos-Dimorphos binary asteroid system on 2022 September 26 UTC. We provide an update to its pre-impact mutual orbit and estimate the post-impact physical and orb
Externí odkaz:
http://arxiv.org/abs/2403.02804
Autor:
Agrusa, Harrison F., Zhang, Yun, Richardson, Derek C., Pravec, Petr, Ćuk, Matija, Michel, Patrick, Ballouz, Ronald-Louis, Jacobson, Seth A., Scheeres, Daniel J., Walsh, Kevin, Barnouin, Olivier, Daly, R. Terik, Palmer, Eric, Pajola, Maurizio, Lucchetti, Alice, Tusberti, Filippo, DeMartini, Joseph V., Ferrari, Fabio, Meyer, Alex J., Raducan, Sabina D., Sánchez, Paul
We explore binary asteroid formation by spin-up and rotational disruption considering the NASA DART mission's encounter with the Didymos-Dimorphos binary, which was the first small binary visited by a spacecraft. Using a suite of $N$-body simulations
Externí odkaz:
http://arxiv.org/abs/2401.09269
Autor:
Boorman, P. G., Torres-Albà, N., Annuar, A., Marchesi, S., Pfeifle, R., Stern, D., Civano, F., Baloković, M., Buchner, J., Ricci, C., Alexander, D. M., Brandt, W. N., Brightman, M., Chen, C. T., Creech, S., Gandhi, P., García, J. A., Harrison, F., Hickox, R., Kammoun, E., LaMassa, S., Lanzuisi, G., Marcotulli, L., Madsen, K., Matt, G., Matzeu, G., Nardini, E., Piotrowska, J. M., Pizzetti, A., Puccetti, S., Sicilian, D., Silver, R., Walton, D. J., Wilkins, D. R., Zhao, X.
Ever since the discovery of the first Active Galactic Nuclei (AGN), substantial observational and theoretical effort has been invested into understanding how massive black holes have evolved across cosmic time. Circum-nuclear obscuration is now estab
Externí odkaz:
http://arxiv.org/abs/2311.04949
Autor:
Ricci, C., Ichikawa, K., Stalevski, M., Kawamuro, T., Yamada, S., Ueda, Y., Mushotzky, R., Privon, G. C., Koss, M. J., Trakhtenbrot, B., Fabian, A. C., Ho, L. C., Asmus, D., Bauer, F. E., Chang, C. S., Gupta, K. K., Oh, K., Powell, M., Pfeifle, R. W., Rojas, A., Ricci, F., Temple, M. J., Toba, Y., Tortosa, A., Treister, E., Harrison, F., Stern, D., Urry, C. M.
Accreting supermassive black holes (SMBHs) located at the center of galaxies are typically surrounded by large quantities of gas and dust. The structure and evolution of this circumnuclear material can be studied at different wavelengths, from the su
Externí odkaz:
http://arxiv.org/abs/2311.01494
Autor:
Meyer, Alex J., Agrusa, Harrison F., Richardson, Derek C., Daly, R. Terik, Fuentes-Muñoz, Oscar, Hirabayashi, Masatoshi, Michel, Patrick, Merrill, Colby C., Nakano, Ryota, Cheng, Andrew F., Barbee, Brent, Barnouin, Olivier S., Chesley, Steven R., Ernst, Carolyn M., Gkolias, Ioannis, Moskovitz, Nicholas A., Naidu, Shantanu P., Pravec, Petr, Scheirich, Petr, Thomas, Cristina A., Tsiganis, Kleomenis, Scheeres, Daniel J.
With the successful impact of the NASA DART spacecraft in the Didymos-Dimorphos binary asteroid system, we provide an initial analysis of the post-impact perturbed binary asteroid dynamics. To compare our simulation results with observations, we intr
Externí odkaz:
http://arxiv.org/abs/2307.16777
Autor:
O'Connor, B., Gogus, E., Hare, J., Mukai, K., Huppenkothen, D., Brink, J., Buckley, D. A. H., Levan, A., Baring, M. G., Stewart, R., Kouveliotou, C., Woudt, P., Bellm, E., Cenko, S. B., Evans, P. A., Granot, J., Hailey, C., Harrison, F., Hartmann, D., van der Horst, A. J., Kaper, L., Kennea, J. A., Potter, S. B., Slane, P. O., Stern, D., Wijers, R. A. M. J., Younes, G.
Here, we present the results of our multi-wavelength campaign aimed at classifying \textit{Swift} J170800$-$402551.8 as part of the \textit{Swift} Deep Galactic Plane Survey (DGPS). We utilized Target of Opportunity (ToO) observations with \textit{Sw
Externí odkaz:
http://arxiv.org/abs/2307.13959
Autor:
O'Connor, B., Kouveliotou, C., Evans, P. A., Gorgone, N., van Kooten, A. J., Gagnon, S., Yang, H., Baring, M. G., Bellm, E., Beniamini, P., Brink, J., Buckley, D. A. H., Cenko, S. B., Egbo, O. D., Gogus, E., Granot, J., Hailey, C., Hare, J., Harrison, F., Hartmann, D., van der Horst, A. J., Huppenkothen, D., Kaper, L., Kargaltsev, O., Kennea, J. A., Mukai, K., Slane, P. O., Stern, D., Troja, E., Wadiasingh, Z., Wijers, R. A. M. J., Woudt, P., Younes, G.
The \textit{Swift} Deep Galactic Plane Survey is a \textit{Swift} Key Project consisting of 380 tiled pointings covering 40 deg$^{2}$ of the Galactic Plane between longitude $10$\,$<$\,$|l|$\,$<$\,$30$ deg and latitude $|b|$\,$<$\,$0.5$ deg. Each poi
Externí odkaz:
http://arxiv.org/abs/2306.14354