Zobrazeno 1 - 10
of 86
pro vyhledávání: '"Gayley, K. G."'
Autor:
Poniatowski, L. G., Kee, N. D., Sundqvist, J. O., Driessen, F. A., Moens, N., Owocki, S. P., Gayley, K. G., Decin, L., de Koter, A., Sana, H.
Publikováno v:
A&A 667, A113 (2022)
In accelerating and supersonic media, the interaction of photons with spectral lines can be of ultimate importance. However, fully accounting for such line forces currently can only be done by specialised codes in 1-D steady-state flows. More general
Externí odkaz:
http://arxiv.org/abs/2204.09981
Autor:
Jones, C. E., Labadie-Bartz, J., Cotton, D. V., Nazé, Y., Peters, G. J., Hillier, D. J., Neiner, C., Richardson, N. D., Hoffman, J. L., Carciofi, A. C., Wisniewski, J. P., Gayley, K. G., Suffak, M. W., Ignace, R., Scowen, P. A.
Publikováno v:
Astrophysics and Space Science, Volume 367, Issue 12, article id.124, December 2022
UV spectroscopy and spectropolarimetry hold the key to understanding certain aspects of massive stars that are largely inaccessible with optical or longer wavelength observations. This is especially true for the rapidly-rotating Be and Bn stars, owin
Externí odkaz:
http://arxiv.org/abs/2111.07926
Autor:
Hubrig, S., Scholz, K., Hamann, W. -R., Schoeller, M., Ignace, R., Ilyin, I., Gayley, K. G., Oskinova, L. M.
To investigate if magnetic fields are present in Wolf-Rayet stars, we selected a few stars in the Galaxy and one in the Large Magellanic Cloud (LMC). We acquired low-resolution spectropolarimetric observations with the ESO FORS2 instrument during two
Externí odkaz:
http://arxiv.org/abs/1603.01441
Autor:
Bray, J. D., Alvarez-Muniz, J., Buitink, S., Dagkesamanskii, R. D., Ekers, R. D., Falcke, H., Gayley, K. G., Huege, T., James, C. W., Mevius, M., Mutel, R. L., Protheroe, R. J., Scholten, O., Spencer, R. E., ter Veen, S.
The lunar Askaryan technique, which involves searching for Askaryan radio pulses from particle cascades in the outer layers of the Moon, is a method for using the lunar surface as an extremely large detector of ultra-high-energy particles. The high t
Externí odkaz:
http://arxiv.org/abs/1509.05256
Autor:
Bray, J. D., Alvarez-Muñiz, J., Buitink, S., Dagkesamanskii, R. D., Ekers, R. D., Falcke, H., Gayley, K. G., Huege, T., James, C. W., Mevius, M., Mutel, R. L., Protheroe, R. J., Scholten, O., Spencer, R. E., ter Veen, S.
The origin of the most energetic particles in nature, the ultra-high-energy (UHE) cosmic rays, is still a mystery. Only the most energetic of these have sufficiently small angular deflections to be used for directional studies, and their flux is so l
Externí odkaz:
http://arxiv.org/abs/1408.6069
Autor:
Gayley, K. G.
In collisional ionization equilibrium (CIE), the X-ray spectrum from a plasma depends on the distribution of emission measure over temperature (DEM). Due to the well-known ill conditioning problem, no precisely resolved DEM can be inverted directly f
Externí odkaz:
http://arxiv.org/abs/1401.6680
Autor:
Ignace, R., Gayley, K. G., Hamann, W. R., Huenemoerder, D. P., Oskinova, L. M., Pollock, A. M. T., McFall, M.
We obtained four pointings of over 100 ks each of the well-studied Wolf-Rayet star WR 6 with the XMM-Newton satellite. With a first paper emphasizing the results of spectral analysis, this follow-up highlights the X-ray variability clearly detected i
Externí odkaz:
http://arxiv.org/abs/1307.7074
The active young protostar DG Tau has an extended jet that has been well studied at radio, optical, and X-ray wavelengths. We report sensitive new VLA full-polarization observations of the core and jet between 5 GHz and 8 GHz. Our high angular resolu
Externí odkaz:
http://arxiv.org/abs/1302.0751
Autor:
Oskinova, L. M., Gayley, K. G., Hamann, W. -R., Huenemoerder, D. P., Ignace, R., Pollock, A. M. T.
We present the first high-resolution X-ray spectrum of a putatively single Wolf-Rayet star. 400 ks observations of WR 6 by the XMM-Newton-telescope resulted in a superb quality high-resolution X-ray spectrum. Spectral analysis reveals that the X-rays
Externí odkaz:
http://arxiv.org/abs/1202.1525