Zobrazeno 1 - 10
of 227
pro vyhledávání: '"O'Dowd M"'
Autor:
Vernardos, G., Sluse, D., Pooley, D., Schmidt, R. W., Millon, M., Weisenbach, L., Motta, V., Anguita, T., Saha, P., O'Dowd, M., Peel, A., Schechter, P. L.
Strong gravitational lensing of quasars has the potential to unlock the poorly understood physics of these fascinating objects, as well as serve as a probe of the lensing mass distribution and of cosmological parameters. In particular, gravitational
Externí odkaz:
http://arxiv.org/abs/2312.00931
Autor:
Leigh, Nathan W. C., Geller, Aaron M., McKernan, B., Ford, K. E. S., Mac Low, M. -M., Bellovary, J., Haiman, Z., Lyra, W., Samsing, J., O'Dowd, M., Kocsis, B., Endlich, S.
We assess the contribution of dynamical hardening by direct three-body scattering interactions to the rate of stellar-mass black hole binary (BHB) mergers in galactic nuclei. We derive an analytic model for the single-binary encounter rate in a nucle
Externí odkaz:
http://arxiv.org/abs/1711.10494
We present new spectroscopy of the z=3.62 gravitationally lensed quasar B1422+117 from the Gemini North GMOS integral field spectrograph. We observe significant differential magnifications between the broad emission lines and the continuum, as well a
Externí odkaz:
http://arxiv.org/abs/1708.07535
Autor:
McKernan, B., Ford, K. E. S., Bellovary, J., Leigh, N. W. C., Haiman, Z., Kocsis, B., Lyra, W., MacLow, M. -M., Metzger, B., O'Dowd, M., Endlich, S., Rosen, D. J.
Publikováno v:
2018ApJ...866...66M
Black hole mergers detectable with LIGO can occur in active galactic nucleus (AGN) disks. Here we parameterize the merger rates, the mass spectrum and the spin spectrum of black holes (BH) in AGN disks. The predicted merger rate spans $\sim 10^{-4}-1
Externí odkaz:
http://arxiv.org/abs/1702.07818
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Autor:
LaMassa, Stephanie M., Heckman, T. M., Ptak, A., Schiminovich, D., O'Dowd, M., Bertincourt, B.
We study a combined sample of 264 star-forming, 51 composite, and 73 active galaxies using optical spectra from SDSS and mid-infrared (mid-IR) spectra from the Spitzer Infrared Spectrograph. We examine optical and mid-IR spectroscopic diagnostics tha
Externí odkaz:
http://arxiv.org/abs/1206.5830
The detailed workings of the central engines of powerful quasars remain a mystery. This is primarily due to the fact that, at their cosmological distances, the inner regions of these quasars are spatially unresolvable. Reverberation mapping is now be
Externí odkaz:
http://arxiv.org/abs/1012.3480
Autor:
Treyer, Marie, Schiminovich, D., Johnson, B. D., O'Dowd, M., Martin, C. D., Wyder, T., Charlot, S., Heckman, T., Martins, L., Seibert, M., van der Hulst, J. M.
We investigate the use of MIR PAH bands, continuum and emission lines as probes of star-formation and AGN activity in a sample of 100 'normal' and local (z~0.1) emission-line galaxies. The MIR spectra were obtained with the Spitzer Space Telescope In
Externí odkaz:
http://arxiv.org/abs/1006.5470
We compare the host galaxies properties of BL Lac objects with those of radio loud quasars (RLQs) imaged by the WFPC2 on board of HST. The considered objects (z<0.5) are always well resolved and their host galaxies satisfactorily modelled by elliptic
Externí odkaz:
http://arxiv.org/abs/astro-ph/0107129