Zobrazeno 81 - 90
of 1 641
pro vyhledávání: '"Vestergaard, M."'
In order to derive information on the star formation history in the early universe we observed 6 high-redshift (z=3.4) quasars in the near-infrared to measure the relative iron and \mgii emission strengths. A detailed comparison of the resulting spec
Externí odkaz:
http://arxiv.org/abs/astro-ph/0109208
Autor:
Shemmer, O., Romano, P., Bertram, R., Brinkmann, W., Collier, S., Crowley, K. A., Detsis, E., Filippenko, A. V., Gaskell, C. M., George, T. A., Gliozzi, M., Hiller, M. E., Jewell, T. L., Kaspi, S., Klimek, E. S., Lannon, M. H., Li, W., Martini, P., Mathur, S., Negoro, H., Netzer, H., Papadakis, I., Papamastorakis, I., Peterson, B. M., Peterson, B. W., Pogge, R. W., Pronik, V. I., Rumstay, K. S., Sergeev, S. G., Sergeeva, E. A., Stirpe, G. M., Taylor, C. J., Treffers, R. R., Turner, T. J., Uttley, P., Vestergaard, M., von Braun, K., Wagner, R. M., Zheng, Z.
We present the results of a two-year long optical monitoring program of the narrow-line Seyfert 1 galaxy Akn 564. The majority of this monitoring project was also covered by X-ray observations (RXTE) and for a period of ~50 days, we observed the gala
Externí odkaz:
http://arxiv.org/abs/astro-ph/0107075
Autor:
Vestergaard, M., Wilkes, B. J.
Iron emission is often a severe contaminant in optical-ultraviolet spectra of active galaxies. Its presence complicates emission line studies. A viable solution, already successfully applied at optical wavelengths, is to use an empirical iron emissio
Externí odkaz:
http://arxiv.org/abs/astro-ph/0106510
Autor:
Vestergaard, M., Wilkes, B. J.
Publikováno v:
Astrophys.J.Suppl.134:1-34,2001
We present an empirical template spectrum suitable for fitting/subtracting and studying the FeII and FeIII line emission in the restframe UV spectra of active galatic nuclei (AGNs), the first empirical UV iron template to cover the full 1250 - 3090 A
Externí odkaz:
http://arxiv.org/abs/astro-ph/0104320
Autor:
Gaillard, C., Sørensen, M.T., Vestergaard, M., Weisbjerg, M.R., Basar, A., Larsen, M.K., Martinussen, H., Kidmose, U., Sehested, J.
Publikováno v:
In Journal of Dairy Science November 2017 100(11):8928-8938
Autor:
Gaillard, C., Sørensen, M.T., Vestergaard, M., Weisbjerg, M.R., Basar, A., Larsen, M.K., Martinussen, H., Kidmose, U., Sehested, J.
Publikováno v:
In Journal of Dairy Science October 2017 100(10):7980-7989
Autor:
Andersen, M. I., Hjorth, J., Pedersen, H., Jensen, B. L., Hunt, L. K., Gorosabel, J., Moller, P., Fynbo, J., Kippen, R. M., Thomsen, B., Olsen, L. F., Christensen, L., Vestergaard, M., Masetti, N., Palazzi, E., Hurley, K., Cline, T., Kaper, L., Jaunsen, A. O.
Publikováno v:
Astron.Astrophys.364:L54-L61,2000
We report the discovery of the gamma-ray burst GRB 000131 and its optical afterglow. The optical identification was made with the VLT 84 hours after the burst following a BATSE detection and an Inter Planetary Network localization. GRB 000131 was a b
Externí odkaz:
http://arxiv.org/abs/astro-ph/0010322
We present evidence that the high-velocity CIV lambda 1549 emission line gas of radio-loud quasars may originate in a disk-like configuration, in close proximity to the accretion disk often assumed to emit the low-ionization lines. For a sample of 36
Externí odkaz:
http://arxiv.org/abs/astro-ph/0006165
Autor:
Peterson, B. M., McHardy, I. M., Wilkes, B. J., Berlind, P., Bertram, R., Calkins, M., Collier, S. J., Huchra, J. P., Mathur, S., Papadakis, I., Peters, J., Pogge, R. W., Romano, P., Tokarz, S., Uttley, P., Vestergaard, M., Wagner, R. M.
We report on the results of a three-year program of coordinated X-ray and optical monitoring of the narrow-line Seyfert 1 galaxy NGC 4051. The rapid continuum variations observed in the X-ray spectra are not detected in the optical, although the time
Externí odkaz:
http://arxiv.org/abs/astro-ph/0005433
We present supportive evidence that the Boroson and Green eigenvector 1 is not driven by source orientation. Until recently it was generally accepted that eigenvector 1 does not depend on orientation as it strongly correlates with [OIII]5007 emission
Externí odkaz:
http://arxiv.org/abs/astro-ph/0005385