Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Rachael M. Alexandroff"'
Autor:
Rachael M. Alexandroff, Nadia L. Zakamska, W. N. Brandt, Serena Perrotta, Jenny E. Greene, Michael A. Strauss, Guilin Liu, Fred Hamann, Nicholas P. Ross, Ai-Lei Sun, Dominika Wylezalek, Marco Chiaberge
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 489:497-516
We present Hubble Space Telescope 1.4-1.6 micron images of the hosts of ten extremely red quasars (ERQs) and six type 2 quasar candidates at z=2-3. ERQs, whose bolometric luminosities range between 10^47 and 10^48 erg/sec, show spectroscopic signs of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b8a3dc944c3f2f2a8688bfc1b29dc2c2
https://doi.org/10.1093/mnras/stz2071
https://doi.org/10.1093/mnras/stz2071
Autor:
Rachael M. Alexandroff, Christopher M. Dupuis, Rolf A. Jansen, Mansi Padave, Sanchayeeta Borthakur, Timothy M. Heckman
We present the discovery of a low-redshift damped Ly$\alpha$ (DLA) system in the spectrum of background starburst galaxy SDSS J111323.88+293039.3 ($z=0.17514$). The DLA is at an impact parameter of $\rm \rho=36~kpc$ from the star forming galaxy, SDSS
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::698a21a300dc2344003a9a7497e2939c
http://arxiv.org/abs/2011.09565
http://arxiv.org/abs/2011.09565
Autor:
Isabelle Pâris, Michael A. Strauss, Rachael M. Alexandroff, Nadia L. Zakamska, Fred Hamann, Nicholas P. Ross, Jenny E. Greene, Julian H. Krolik, Aaron J. Barth
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, 2018, 479, pp.4936-4957. ⟨10.1093/mnras/sty1685⟩
Alexandroff, R M, Zakamska, N L, Barth, A J, Hamann, F, Strauss, M A, Krolik, J, Greene, J E, Pâris, I & Ross, N P 2018, ' Spectropolarimetry of high-redshift obscured and red quasars ', Monthly Notices of the Royal Astronomical Society, vol. 479, no. 4, pp. 4936-4957 . https://doi.org/10.1093/mnras/sty1685
Monthly Notices of the Royal Astronomical Society, 2018, 479, pp.4936-4957. ⟨10.1093/mnras/sty1685⟩
Alexandroff, R M, Zakamska, N L, Barth, A J, Hamann, F, Strauss, M A, Krolik, J, Greene, J E, Pâris, I & Ross, N P 2018, ' Spectropolarimetry of high-redshift obscured and red quasars ', Monthly Notices of the Royal Astronomical Society, vol. 479, no. 4, pp. 4936-4957 . https://doi.org/10.1093/mnras/sty1685
Spectropolarimetry is a powerful technique that has provided critical support for the geometric unification model of local active galactic nuclei. In this paper, we present optical (rest-frame UV) Keck spectropolarimetry of five luminous obscured (Ty
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f28ff08fbfeaa680c9997591fbaf0f59
https://doi.org/10.1093/mnras/sty1685
https://doi.org/10.1093/mnras/sty1685
Autor:
Fred Hamann, Serena Perrotta, Rachael M. Alexandroff, David S. N. Rupke, Dominika Wylezalek, Nadia L. Zakamska
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::80df631e98425f4ba1e0115d41fa4d0c
http://arxiv.org/abs/1906.00980
http://arxiv.org/abs/1906.00980
Current models of galaxy formation require star formation in high-mass galaxies to be limited by poorly understood mechanisms of quasar feedback. Feedback processes can be studied by examining the molecular gas content of AGN hosts through the CO rot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::823f6aa1b94c38a13c2908e6699873e2
Autor:
Jenny E. Greene, Rachael M. Alexandroff, Serena Perrotta, Gordon T. Richards, Hsiang-Chih Hwang, Fred Hamann, Nadia L. Zakamska
Most active galactic nuclei (AGNs) are radio-quiet, and the origin of their radio emission is not well-understood. One hypothesis is that this radio emission is a by-product of quasar-driven winds. In this paper, we present the radio properties of 10
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8845e63377ccef7c56a76a3ee1646189
Autor:
Isabelle Pâris, Nicholas P. Ross, Fred Hamann, Rachael M. Alexandroff, Michael A. Strauss, Carolin Villforth, Dominika Wylezalek, W. N. Brandt, Nadia L. Zakamska, Jenny E. Greene
Publikováno v:
Zakamska, N L, Hamann, F, Pâris, I, Brandt, W N, Greene, J E, Strauss, M A, Villforth, C, Wylezalek, D, Alexandroff, R M & Ross, N P 2016, ' Discovery of extreme [O III] λ5007 Å outflows in high-redshift red quasars ', Monthly Notices of the Royal Astronomical Society, vol. 459, pp. 3144-3160 . https://doi.org/10.1093/mnras/stw718
Black hole feedback is now a standard component of galaxy formation models. These models predict that the impact of black hole activity on its host galaxy likely peaked at z=2-3, the epoch of strongest star formation activity and black hole accretion
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac7462cb28cb65a06a3937f5d0535150
https://purehost.bath.ac.uk/ws/files/144863072/MNRAS_2016_Zakamska_3144_60.pdf
https://purehost.bath.ac.uk/ws/files/144863072/MNRAS_2016_Zakamska_3144_60.pdf
Autor:
Jenny E. Greene, Michael A. Strauss, Sjoert van Velzen, Rachael M. Alexandroff, Nadia L. Zakamska
We study the radio properties of moderately obscured quasars over a range of redshifts to understand the role of radio activity in accretion using the Jansky Very Large Array (JVLA) at 6.0GHz and 1.4GHz. Our z~2.5 sample consists of optically-selecte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af469e923997e736763120d6e7e9233b
http://arxiv.org/abs/1603.07325
http://arxiv.org/abs/1603.07325
Autor:
Rachael M. Alexandroff, Nicholas P. Ross, Nadia L. Zakamska, Kelly D. Denney, Ben Cook, Jenny E. Greene, Donald P. Schneider, Fred Hamann, H. Herbst, W. Niel Brandt, Isabelle Paris, Gordon T. Richards, Carolin Villforth, Michael A. Strauss
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2017, 000 (3), pp.1-32. ⟨10.1093/mnras/stw2387⟩
Hamann, F, Zakamska, N L, Ross, N, Paris, I, Alexandroff, R M, Villforth, C, Richards, G T, Herbst, H, Brandt, W N, Cook, B, Denney, K D, Greene, J E, Schneider, D P & Strauss, M A 2016, ' Extremely red quasars in BOSS ', Monthly Notices of the Royal Astronomical Society, vol. 464, no. 3, pp. 3431-3463 . https://doi.org/10.1093/mnras/stw2387
Monthly Notices of the Royal Astronomical Society, 2017, 000 (3), pp.1-32. ⟨10.1093/mnras/stw2387⟩
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2017, 000 (3), pp.1-32. ⟨10.1093/mnras/stw2387⟩
Hamann, F, Zakamska, N L, Ross, N, Paris, I, Alexandroff, R M, Villforth, C, Richards, G T, Herbst, H, Brandt, W N, Cook, B, Denney, K D, Greene, J E, Schneider, D P & Strauss, M A 2016, ' Extremely red quasars in BOSS ', Monthly Notices of the Royal Astronomical Society, vol. 464, no. 3, pp. 3431-3463 . https://doi.org/10.1093/mnras/stw2387
Monthly Notices of the Royal Astronomical Society, 2017, 000 (3), pp.1-32. ⟨10.1093/mnras/stw2387⟩
Red quasars are candidate young objects in an early transition stage of massive galaxy evolution. Our team recently discovered a population of extremely red quasars (ERQs) in the Baryon Oscillation Spectroscopic Survey (BOSS) that has a suite of pecu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb5e8c6f4912d6e5f3cad1a132bbfa3b
Autor:
Isabelle Pâris, W. Niel Brandt, Donald P. Schneider, Rachael M. Alexandroff, Carolin Villforth, Nadia L. Zakamska, Adam D. Myers, Michael A. Strauss, Gordon T. Richards, Fred Hamann, Guilin Liu, Jenny E. Greene, Nicholas P. Ross
Publikováno v:
Ross, N, Hamann, F, Zakamska, N L, Richards, G T, Villforth, C, Strauss, M A, Greene, J E, Alexandroff, R M, Brandt, W N, Liu, G, Myers, A D, Paris, I & Schneider, D P 2015, ' Extremely red quasars from SDSS, BOSS and WISE: classification of optical spectra ', Monthly Notices of the Royal Astronomical Society . https://doi.org/10.1093/mnras/stv1710
Ross, N P, Hamann, F, Zakamska, N L, Richards, G T, Villforth, C, Strauss, M A, Greene, J E, Alexandroff, R, Brandt, W N, Liu, G, Myers, A D, Paris, I & Schneider, D P 2015, ' Extremely red quasars from SDSS, BOSS and WISE : classification of optical spectra ', Monthly Notices of the Royal Astronomical Society, vol. 453, no. 4, pp. 3932-3952 . https://doi.org/10.1093/mnras/stv1710
Ross, N P, Hamann, F, Zakamska, N L, Richards, G T, Villforth, C, Strauss, M A, Greene, J E, Alexandroff, R, Brandt, W N, Liu, G, Myers, A D, Paris, I & Schneider, D P 2015, ' Extremely red quasars from SDSS, BOSS and WISE : classification of optical spectra ', Monthly Notices of the Royal Astronomical Society, vol. 453, no. 4, pp. 3932-3952 . https://doi.org/10.1093/mnras/stv1710
Quasars with extremely red infrared-to-optical colours are an interesting population that can test ideas about quasar evolution as well as orientation, obscuration and geometric effects in the so-called AGN unified model. To identify such a populatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6c703202f2ec7e66e1d6bfef1382f2db
https://hdl.handle.net/20.500.11820/998cce4e-cbe3-45ef-b78b-ba2c15b8c9b2
https://hdl.handle.net/20.500.11820/998cce4e-cbe3-45ef-b78b-ba2c15b8c9b2