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pro vyhledávání: '"Forman, William"'
Akademický článek
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Autor:
Snios, Bradford, Nulsen, Paul E. J., Kraft, Ralph P., Cheung, C. C., Meyer, Eileen T., Forman, William R., Jones, Christine, Murray, Stephen S.
Chandra HRC observations are investigated for evidence of proper motion and brightness changes in the X-ray jet of the nearby radio galaxy M87. Using images spanning 5 yr, proper motion is measured in the X-ray knot HST-1, with a superluminal apparen
Externí odkaz:
http://arxiv.org/abs/1905.04330
Autor:
Ge, Chong, Sun, Ming, Liu, Ruo-Yu, Rudnick, Lawrence, Sarazin, Craig, Forman, William, Jones, Christine, Chen, Hao, Liu, Wenhao, Yagi, Masafumi, Boselli, Alessandro, Fossati, Matteo, Gavazzi, Giuseppe
Multi-wavelength observations show that Abell 1367 (A1367) is a dynamically young cluster, with at least two subclusters merging along the SE-NW direction. With the wide-field XMM-Newton mosaic of A1367, we discover a previously unknown merger shock
Externí odkaz:
http://arxiv.org/abs/1904.08803
Moderately strong shocks arise naturally when two subclusters merge. For instance, when a smaller subcluster falls into the gravitational potential of a more massive cluster, a bow shock is formed and moves together with the subcluster. After pericen
Externí odkaz:
http://arxiv.org/abs/1904.03052
Autor:
Drake, Jeremy J., Alvarado-Gómez, Julián D., Airapetian, Vladimir, Cauley, P. Wilson, Argiroffi, Costanza, Browning, Matthew K., Christian, Damian J., Cohen, Ofer, Corrales, Lia, Danchi, William, de Val-Borro, Miguel, Dong, Chuanfei, Forman, William, France, Kevin, Gallo, Elena, Garcia-Sage, Katherine, Garraffo, Cecilia, Gelino, Dawn M., Gronoff, Guillaume, Günther, H. Moritz, Harper, Graham M., Haywood, Raphaëlle D., Karovska, Margarita, Kashyap, Vinay, Kastner, Joel, Kim, Jinyoung Serena, Leutenegger, Maurice A., Linsky, Jeffrey, López-Morales, Mercedes, Micela, Giusi, Moschou, Sofia-Paraskevi, Oskinova, Lidia, Osten, Rachel A., Owen, James E., Poppenhaeger, Katja, Principe, David A., Pye, John P., Sciortino, Salvatore, Tzanavaris, Panayiotis, Wargelin, Brad, Wheatley, Peter J., Williams, Peter K. G., Winston, Elaine, Wolk, Scott J.
It is now recognized that energetic stellar photon and particle radiation evaporates and erodes planetary atmospheres and controls upper atmospheric chemistry. Key exoplanet host stars will be too faint at X-ray wavelengths for accurate characterizat
Externí odkaz:
http://arxiv.org/abs/1903.12338
Autor:
Sheardown, Alex, Fish, Thomas M., Roediger, Elke, Hunt, Matthew, ZuHone, John, Su, Yuanyuan, Kraft, Ralph P., Nulsen, Paul, Churazov, Eugene, Forman, William, Jones, Christine, Lyskova, Natalia, Eckert, Dominique, de Grandi, Sabrina
We show that there is a new class of gas tails - slingshot tails - which form as a subhalo (i.e. a subcluster or early-type cluster galaxy) moves away from the cluster center towards the apocenter of its orbit. These tails can point perpendicular or
Externí odkaz:
http://arxiv.org/abs/1903.00482
Autor:
Snios, Bradford, Wykes, Sarka, Nulsen, Paul E. J., Kraft, Ralph P., Meyer, Eileen T., Birkinshaw, Mark, Worrall, Diana M., Hardcastle, Martin J., Roediger, Elke, Forman, William R., Jones, Christine
We report results from Chandra observations analyzed for evidence of variability and proper motion in the X-ray jet of Centaurus A. Using data spanning 15 years, collective proper motion of $11.3\pm3.3$ mas yr$^{-1}$, or $0.68\pm0.20c$, is detected f
Externí odkaz:
http://arxiv.org/abs/1901.00509
Based on constraints from Big Bang nucleosynthesis and the cosmic microwave background, the baryon content of the high-redshift Universe can be precisely determined. However, at low redshift, about one-third of the baryons remain unaccounted for, whi
Externí odkaz:
http://arxiv.org/abs/1812.04625
Autor:
Wykes, Sarka, Snios, Bradford T., Nulsen, Paul E. J., Kraft, Ralph P., Birkinshaw, Mark, Hardcastle, Martin J., Worrall, Diana M., McDonald, Iain, Rejkuba, Marina, Jones, Thomas W., Stark, David J., Forman, William R., Meyer, Eileen T., Jones, Christine
We implement a steady, one-dimensional flow model for the X-ray jet of Centaurus A in which entrainment of stellar mass loss is the primary cause of dissipation. Using over 260 ks of new and archival Chandra/ACIS data, we have constrained the tempera
Externí odkaz:
http://arxiv.org/abs/1812.04587
Autor:
Bogdan, Akos, Lovisari, Lorenzo, Kovacs, Orsolya E., Andrade-Santos, Felipe, Jones, Christine, Forman, William R., Kraft, Ralph P.
Brightest Cluster Galaxies (BCGs) residing in the centers of galaxy clusters are typically quenched giant ellipticals. A recent study hinted that star-forming galaxies with large disks, so-called superluminous spirals and lenticulars, are the BCGs of
Externí odkaz:
http://arxiv.org/abs/1811.04958