Zobrazeno 1 - 10
of 106
pro vyhledávání: '"Gregg, M. D."'
Autor:
Obasi, C., Gómez, M., Minniti, D., Alonso-García, J., Hempel, M., Pullen, J. B., Gregg, M. D., Baravalle, L. D., Alonso, M. V., Okere, B. I.
Publikováno v:
A&A 670, A18 (2023)
Context. The globular cluster (GC) system of Circinus galaxy has not been probed previously partly because of the location of the galaxy at - 3.8$^\circ$ Galactic latitude which suffers severely from interstellar extinction, stellar crowding, and Gal
Externí odkaz:
http://arxiv.org/abs/2212.05482
Autor:
Barth, A. J., Pancoast, A., Thorman, S. J., Bennert, V. N., Sand, D. J., Li, W., Canalizo, G., Filippenko, A. V., Gates, E. L., Greene, J. E., Malkan, M. A., Stern, D., Treu, T., Woo, J. -H., Assef, R. J., Bae, H. -J., Brewer, B. J., Buehler, T., Cenko, S. B., Clubb, K. I., Cooper, M. C., Diamond-Stanic, A. M., Hiner, K. D., Hoenig, S. F., Joner, M. D., Kandrashoff, M. T., Laney, C. D., Lazarova, M. S., Nierenberg, A. M., Park, D., Silverman, J. M., Son, D., Sonnenfeld, A., Tollerud, E. J., Walsh, J. L., Walters, R., da Silva, R. L., Fumagalli, M., Gregg, M. D., Harris, C. E., Hsiao, E. Y., Lee, J., Lopez, L., Rex, J., Suzuki, N., Trump, J. R., Tytler, D., Worseck, G., Yesuf, H. M.
The Lick AGN Monitoring Project 2011 observing campaign was carried out over the course of 11 weeks in Spring 2011. Here we present the first results from this program, a measurement of the broad-line reverberation lag in the Seyfert 1 galaxy Mrk 50.
Externí odkaz:
http://arxiv.org/abs/1111.0061
Autor:
Hall, Patrick B., Anosov, Konstantin, White, R. L., Brandt, W. N., Gregg, M. D., Gibson, R. R., Becker, R. H., Schneider, D. P.
We have observed a dramatic change in the spectrum of the formerly heavily absorbed `overlapping-trough' iron low-ionization broad absorption line (FeLoBAL) quasar FBQS J1408+3054. Over a time span of between 0.6 to 5 rest-frame years, the Mg II trou
Externí odkaz:
http://arxiv.org/abs/1010.3728
Autor:
DiPompeo, M. A., Brotherton, M. S., Becker, R. H., Tran, H. D., Gregg, M. D., White, R. L., Laurent-Muehleisen, S. A.
Publikováno v:
Astrophysical Journal Supplement Series, 189:83-103, 2010 July
We report spectropolarimetry of 30 radio-selected broad absorption line (BAL) quasars with the Keck Observatory, 25 from the sample of Becker et al. (2000). Both high and low-ionization BAL quasars are represented, with redshifts ranging from 0.5 to
Externí odkaz:
http://arxiv.org/abs/1007.0028
Autor:
Evstigneeva, E. A., Drinkwater, M. J., Peng, C. Y., Hilker, M., De Propris, R., Jones, J. B., Phillipps, S., Gregg, M. D., Karick, A. M.
Publikováno v:
The Astronomical Journal 136 (2008) 461-478
We present a detailed analysis of two-band HST/ACS imaging of 21 ultra-compact dwarf (UCD) galaxies in the Virgo and Fornax Clusters. The aim of this work is to test two formation hypotheses for UCDs--whether they are bright globular clusters (GCs) o
Externí odkaz:
http://arxiv.org/abs/0804.4353
Autor:
Morris, R. A. H., Phillipps, S., Jones, J. B., Drinkwater, M. J., Gregg, M. D., Couch, W. J., Parker, Q. A., Smith, R. M.
Publikováno v:
Astron.Astrophys.476:59-62,2007
The Fornax Cluster Spectroscopic Survey (FCSS) is an all-object survey of a region around the Fornax Cluster of galaxies undertaken using the 2dF multi-object spectrograph on the Anglo-Australian Telescope. Its aim was to obtain spectra for a complet
Externí odkaz:
http://arxiv.org/abs/0712.0200
Autor:
Firth, P., Drinkwater, M. J., Evstigneeva, E. A., Gregg, M. D., Karick, A., Jones, J. B., Phillipps, S.
We have obtained spectroscopic redshifts of colour-selected point sources in four wide area VLT-FLAMES fields around the Fornax Cluster giant elliptical galaxy NGC 1399, identifying as cluster members 30 previously unknown faint (-10.5
Externí odkaz:
http://arxiv.org/abs/0709.2517
Autor:
Evstigneeva, E. A., Drinkwater, M. J., Jurek, R., Firth, P., Jones, J. B., Gregg, M. D., Phillipps, S.
Publikováno v:
Mon.Not.Roy.Astron.Soc.378:1036-1042,2007
We present the results of a search for ultra-compact dwarf galaxies (UCDs) in six different galaxy groups: Dorado, NGC1400, NGC0681, NGC4038, NGC4697 and NGC5084. We searched in the apparent magnitude range 17.5 < b_j < 20.5 (except NGC5084: 19.2 < b
Externí odkaz:
http://arxiv.org/abs/0704.1750
Publikováno v:
Astron.J.133:1722-1740,2007
We present new imaging and spectroscopic observations of six ultra-compact dwarf (UCD) galaxies in the Virgo Cluster, along with re-analysed data for five Fornax Cluster UCDs. These are the most luminous UCDs: -14
Externí odkaz:
http://arxiv.org/abs/astro-ph/0612483
Publikováno v:
Mon.Not.Roy.Astron.Soc.372:1856-1868,2006
We have redefined group membership of six southern galaxy groups in the local universe (mean cz < 2000 km/s) based on new redshift measurements from our recently acquired Anglo-Australian Telescope 2dF spectra. For each group, we investigate member g
Externí odkaz:
http://arxiv.org/abs/astro-ph/0608584