Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Lacy, Mark"'
We present preliminary results of a search for galaxies at z>4 through Lyman-limit imaging of the fields of known high-redshift radio-galaxies. Objects were selected by means of their broad-band colours, and spectroscopy of candidate objects in one o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e5652feb2ad02f884cdfab09f2aaa28
https://ora.ox.ac.uk/objects/uuid:5d19455f-4e20-4754-bac6-f37caa1879e9
https://ora.ox.ac.uk/objects/uuid:5d19455f-4e20-4754-bac6-f37caa1879e9
Autor:
Bennert, Nicola, Canalizo, Gabriela, Jungwiert, Bruno, Stockton, Alan, Schweizer, Francois, Peng, Chien Y., Lacy, Mark
To study the relevance of mergers for the fueling of QSOs, we are currently conducting an HST imaging campaign of a sample of QSO host galaxies classified as ellipticals in the literature. Here, we present results from a study of the first five QSO h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d6ab3421449f982e0cd6a63b660f6f0
http://arxiv.org/abs/0807.3371
http://arxiv.org/abs/0807.3371
Autor:
Bennert, Nicola, Canalizo, Gabriela, Jungwiert, Bruno, Stockton, Alan, Schweizer, Francois, Peng, Chien Y., Lacy, Mark
We present results from a pilot HST ACS deep imaging study in broad-band V of five low-redshift QSO host galaxies classified in the literature as ellipticals. The aim of our study is to determine whether these early-type hosts formed at high redshift
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c838596377499e7941228be66f73917a
https://resolver.caltech.edu/CaltechAUTHORS:BENapj08
https://resolver.caltech.edu/CaltechAUTHORS:BENapj08
Recent Spitzer observations have revealed a substantial population of z~2 ULIRGs with deep silicate absorption (��_{9.7}>1). This paper reports a 20cm radio study of such a sample to elucidate their physical nature. We discover that a substantial
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b26a905ba9bd36230627a60f6145add4
http://arxiv.org/abs/0708.0407
http://arxiv.org/abs/0708.0407
Autor:
Lacy, Mark
This review attempts to describe developments in the fields of quasar and quasar host galaxies in the past five. In this time period, the Sloan and 2dF quasar surveys have added several tens of thousands of quasars, with Sloan quasars being found to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1e37ff3f328dcf78519bc2db99c0fcbb
http://arxiv.org/abs/astro-ph/0601255
http://arxiv.org/abs/astro-ph/0601255
Autor:
Schaefer, Justin J., Brotherton, Michael S., Shang, Zhaohui, Gregg, Michael D., Becker, Robert H., Laurent-Muehleisen, Sally A., Lacy, Mark, White, Richard L.
We have detected FIRST J101614.3+520916 with the XMM-Newton X-ray Observatory. FIRST J101614.3+520916, one of the most extreme radio-loud, broad absorption line (BAL) quasars so far discovered, is also a Fanaroff-Riley type II (FR II) radio source. W
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a86a168af3aeff9da79097a3296dd9e5
Autor:
Wilson, Gillian, Muzzin, Adam, Lacy, Mark, Yee, Howard, Surace, Jason, Lonsdale, Carol, Hoekstra, Henk, Majumdar, Subhabrata, Gilbank, David, Gladders, Mike
As the densest galaxy environments in the universe, clusters are vital to our understanding of the role that environment plays in galaxy formation and evolution. Unfortunately, the evolution of high-redshift cluster galaxies is poorly understood beca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::642b503ce987a6e65f55a0a253546697
We present an infrared adaptation of the Cluster Red-Sequence method. We modify the two filter technique of Gladders & Yee (2000) to identify clusters based on their R-[3.6] color. We apply the technique to the 4 degree^2 Spitzer First Look Survey an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9196344cecced803d5589a2dca03bad4
http://arxiv.org/abs/astro-ph/0503638
http://arxiv.org/abs/astro-ph/0503638
We have measured the 3.6 micron cluster luminosity function (LF) using a sample of 123 galaxy clusters selected from the 4 degree^2 Spitzer First Look Survey (FLS). The clusters were selected on the basis of their R - 3.6 micron colors using the clus
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a66845e4d2e1ee2afe7a5043e13ad95
http://arxiv.org/abs/astro-ph/0503640
http://arxiv.org/abs/astro-ph/0503640
Autor:
Lacy, Mark, Canalizo, Gabriela, Rawlings, Steve, Sajina, Anna, Storrie-Lombardi, Lisa, Armus, Lee, Marleau, Francine R., Muzzin, Adam
We present early results from the spectroscopic follow-up of a sample of candidate obscured AGN selected in the mid-infrared from the Spitzer First Look Survey. Our selection allows a direct comparison of the numbers of obscured and unobscured AGN at
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d6aa26c94abcd38af450b58517a7d0cf
http://arxiv.org/abs/astro-ph/0411416
http://arxiv.org/abs/astro-ph/0411416