Zobrazeno 1 - 10
of 604
pro vyhledávání: '"Hamann, F"'
Autor:
Rupke, D. S. N., Wylezalek, D., Zakamska, N. L., Veilleux, S., Bertemes, C., Ishikawa, Y., Liu, W., Sankar, S., Vayner, A., Lim, H. X. G., McCrory, R., Murphree, G., Whitesell, L., Shen, L., Liu, G., Barrera-Ballesteros, J. K., Chen, H. -W., Diachenko, N., Goulding, A. D., Greene, J. E., Hainline, K. N., Hamann, F., Heckman, T., Johnson, S. D., Lutz, D., Lützgendorf, N., Mainieri, V., Nesvadba, N., Ogle, P., Sturm, E.
Publikováno v:
2023ApJ...953L..26R
The [OIII] 5007 A emission line is the most common tracer of warm, ionized outflows in active galactic nuclei across cosmic time. JWST newly allows us to use mid-infrared spectral features at both high spatial and spectral resolution to probe these s
Externí odkaz:
http://arxiv.org/abs/2306.12541
Autor:
Perrotta, S., D'Odorico, V., Prochaska, J. X., Cristiani, S., Cupani, G., Ellison, S., López, S., Becker, G. D., Berg, T. A. M., Christensen, L., Denney, K. D., Hamann, F., Pâris, I., Vestergaard, M., Worseck, G.
We statistically study the physical properties of a sample of narrow absorption line (NAL) systems looking for empirical evidences to distinguish between intrinsic and intervening NALs without taking into account any a priori definition or velocity c
Externí odkaz:
http://hdl.handle.net/10150/621733
http://arizona.openrepository.com/arizona/handle/10150/621733
http://arizona.openrepository.com/arizona/handle/10150/621733
Autor:
López, S., D’Odorico, V., Ellison, S. L., Becker, G. D., Christensen, L., Cupani, G., Denney, K. D., Pâris, I., Worseck, G., Berg, T. A. M., Cristiani, S., Dessauges-Zavadsky, M., Haehnelt, M., Hamann, F., Hennawi, J., Iršič, V., Kim, T.-S., López, P., Lund Saust, R., Ménard, B., Perrotta, S., Prochaska, J. X., Sánchez-Ramírez, R., Vestergaard, M., Viel, M., Wisotzki, L.
We describe the execution and data reduction of the European Southern Observatory Large Programme "Quasars and their absorption lines: a legacy survey of the high-redshift Universe with VLT/X-shooter" (hereafter "XQ-100"). XQ-100 has produced and mad
Externí odkaz:
http://hdl.handle.net/10150/622799
http://arizona.openrepository.com/arizona/handle/10150/622799
http://arizona.openrepository.com/arizona/handle/10150/622799
We study the connection between the X-ray and UV properties of the broad absorption line (BAL) wind in the highly X-ray variable quasar PG 2112+059 by comparing Chandra-ACIS data with contemporaneous UV HST/STIS spectra in three different epochs. We
Externí odkaz:
http://arxiv.org/abs/2106.06567
Autor:
Falcão, Anna Trindade, Kraemer, S. B., Fischer, T. C., Crenshaw, D. M., Revalski, M., Schmitt, H. R., Maksym, W. P., Vestergaard, M., Elvis, M., Gaskell, C. M., Hamann, F., Ho, L. C., Hutchings, J., Mushotzky, R., Netzer, H., Storchi-Bergmann, T., Turner, T. J., Ward, M. J.
We present a dynamical study of the narrow-line regions in two nearby QSO2s. We construct dynamical models based on detailed photoionization models of the emission-line gas, including the effects of internal dust, to apply to observations of large-sc
Externí odkaz:
http://arxiv.org/abs/2105.12188
Autor:
Falcao, Anna Trindade, Kraemer, S. B., Fischer, T. C., Crenshaw, D. M., Revalski, M., Schmitt, H. R., Vestergaard, M., Elvis, M., Gaskell, C. M., Hamann, F., Ho, L. C., Hutchings, J., Mushotzky, R., Netzer, H., Storchi-Bergmann, T., Turner, T. J., Ward, M. J.
We use Hubble Space Telescope (HST)/ Space Telescope Imaging Spectrograph (STIS) long-slit G430M and G750M spectra to analyse the extended [O~III] 5007A emission in a sample of twelve nearby (z < 0.12) luminous (L_bol > 1.6 x 10^45 erg s^-1) QSO2s. T
Externí odkaz:
http://arxiv.org/abs/2010.08050
We investigate Extremely Red Quasars (ERQs), a remarkable population of heavily-reddened quasars at redshift z$\sim$2 - 3 that might be caught during a short-lived 'blow-out' phase of quasar/galaxy evolution. We perform a near-IR observational campai
Externí odkaz:
http://arxiv.org/abs/1906.00980
Autor:
Villforth, C., Herbst, H., Hamann, F., Hamilton, T., Bertemes, C., Efthymiadou, A., Hewlett, T.
Theoretical models have suggested an evolutionary model for quasars, in which most of luminous quasars are triggered by major mergers. It is also postulated that reddening as well as powerful outflows indicate an early phase of activity, close to the
Externí odkaz:
http://arxiv.org/abs/1811.11773
Autor:
Perrotta, S., D'Odorico, V., Hamann, F., Cristiani, S., Prochaska, J. X., Ellison, S. L., Lopez, S., Cupani, G., Becker, G., Berg, T. A. M., Christensen, L., Denney, K. D., Worseck, G.
We investigate the NV absorption signal along the line of sight of background quasars, in order to test the robustness of the use of this ion as criterion to select intrinsic (i.e. physically related to the quasar host galaxy) narrow absorption lines
Externí odkaz:
http://arxiv.org/abs/1808.09995
Autor:
Fischer, Travis C., Kraemer, S. B., Schmitt, H. R., Micchi, L. F. Longo, Crenshaw, D. M., Revalski, M., Vestergaard, M., Elvis, M., Gaskell, C. M., Hamann, F., Ho, L. C., Hutchings, J., Mushotsky, R., Netzer, H., Storchi-Bergmann, T., Straughn, A., Turner, T. J., Ward, M. J.
We present a Hubble Space Telescope (HST) survey of extended [O III] {\lambda}5007 emission for a sample of 12 nearby (z < 0.12), luminous Type 2 quasars (QSO2s), which we use to measure the extent and kinematics of their AGN-ionized gas. We find the
Externí odkaz:
http://arxiv.org/abs/1802.06184