Zobrazeno 1 - 10
of 8 638
pro vyhledávání: '"Parker, M A"'
Autor:
Ochmann, M. W., Kollatschny, W., Probst, M. A., Romero-Colmenero, E., Buckley, D. A. H., Chelouche, D., Chini, R., Grupe, D., Haas, M., Kaspi, S., Komossa, S., Parker, M. L., Santos-Lleo, M., Schartel, N., Famula, P.
Publikováno v:
A&A 686, A17 (2024)
NGC 1566 is known for exhibiting recurrent outbursts, which are accompanied by changes in spectral type. The most recent transient event occurred from 2017 to 2019 and was reported to be accompanied by a change in Seyfert classification from Seyfert
Externí odkaz:
http://arxiv.org/abs/2402.12054
Autor:
Storey, D., Zhang, C., Claveria, P. San Miguel, Cao, G. J., Adli, E., Alsberg, L., Ariniello, R., Clarke, C., Corde, S., Dalichaouch, T. N., Ekerfelt, H., Emma, C., Gerstmayr, E., Gessner, S., Gilljohann, M., Hast, C., Knetsch, A., Lee, V., Litos, M., Loney, R., Marsh, K. A., Matheron, A., Mori, W. B., Nie, Z., O'Shea, B., Parker, M., White, G., Yocky, G., Zakharova, V., Hogan, M. J., Joshi, C.
Plasma Wakefield Acceleration (PWFA) provides ultrahigh acceleration gradients of 10s of GeV/m, providing a novel path towards efficient, compact, TeV-scale linear colliders and high brightness free electron lasers. Critical to the success of these a
Externí odkaz:
http://arxiv.org/abs/2310.06215
Autor:
Komossa, S., Kraus, A., Grupe, D., Gonzalez, A. G., Gurwell, M. A., Gallo, L. C., Liu, F. K., Myserlis, I., Krichbaum, T. P., Laine, S., Bach, U., Gomez, J. L., Parker, M. L., Yao, S., Berton, M.
Based on our dedicated Swift monitoring program, MOMO, OJ 287 is one of the best-monitored blazars in the X-ray--UV--optical regime. Here, we report results from our accompanying, dense, multi-frequency (1.4--44 GHz) radio monitoring of OJ 287 betwee
Externí odkaz:
http://arxiv.org/abs/2302.11486
We present the timing and spectral analysis of the Compton Thick Seyfert 2 active galactic nuclei NGC 1068 observed using {\it NuSTAR} and {\it XMM-Newton}. In this work for the first time we calculated the coronal temperature ($\rm{kT_{e}}$) of the
Externí odkaz:
http://arxiv.org/abs/2209.10261
Autor:
Matzeu, G. A., Lieu, M., Costa, M. T., Reeves, J. N., Braito, V., Dadina, M., Nardini, E., Boorman, P. G., Parker, M. L., Sim, S. A., Barret, D., Kammoun, E., Middei, R., Giustini, M., Brusa, M., Cabrera, J. Pérez, Marchesi, S.
We present a new X-Ray Accretion Disk-wind Emulator (\textsc{xrade}) based on the 2.5D Monte Carlo radiative transfer code which provides a physically-motivated, self-consistent treatment of both absorption and emission from a disk-wind by computing
Externí odkaz:
http://arxiv.org/abs/2207.13731
Autor:
Komossa, S., Kraus, A., Grupe, D., Parker, M. L., Gonzalez, A., Gallo, L. C., Gurwell, M. A., Laine, S., Yao, S., Chandra, S., Dey, L., Gomez, J. L., Hada, A. Gopakumar. K., Haggard, D., Hollett, A. R., Jermak, H., Jorstad, S., Krichbaum, T. P., Markoff, S., McCall, C., Neilsen, J., Nowak, M.
We are carrying out the densest and longest multiyear, multiwavelength monitoring project of OJ 287 ever done. The project MOMO (Multiwavelength Observations and Modelling of OJ 287) covers wavelengths from the radio to the high-energy regime. A few
Externí odkaz:
http://arxiv.org/abs/2207.11291
We explore the possibility of using machine learning to estimate physical parameters directly from AGN X-ray spectra without needing computationally expensive spectral fitting. Specifically, we consider survey quality data, rather than long pointed o
Externí odkaz:
http://arxiv.org/abs/2206.04602
Autor:
Parker, M. L., Matzeu, G. A., Matthews, J. H., Middleton, M. J., Dauser, T., Jiang, J., Joyce, A. M.
Relativistic Fe K emission lines from accretion disks and from disk winds encode key information about black holes, and their accretion and feedback mechanisms. We show that these two processes can in principle produce indistinguishable line profiles
Externí odkaz:
http://arxiv.org/abs/2203.14789
Autor:
Mallick, L., Fabian, A. C., García, J. A., Tomsick, J. A., Parker, M. L., Dauser, T., Wilkins, D. R., De Marco, B., Steiner, J. F., Connors, R. M. T., Mastroserio, G., Markowitz, A. G., Pinto, C., Alston, W. N., Lohfink, A. M., Gandhi, P.
The standard alpha-disc model predicts an anti-correlation between the density of the inner accretion disc and the black hole mass times square of the accretion rate, as seen in higher mass ($M_{\rm BH}>10^{6} M_{\odot}$) active galactic nuclei (AGNs
Externí odkaz:
http://arxiv.org/abs/2203.04522
Publikováno v:
ApJ 925 190 (2022)
We present hydrodynamic simulations of the Pegasus-Pisces (PP Arch), an intermediate velocity cloud in our Galaxy. The PP Arch, also known as IVC 86-36, is unique among intermediate and high velocity clouds, because its twin tails are unusually long
Externí odkaz:
http://arxiv.org/abs/2203.00720