Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Matejek, Michael"'
Autor:
Chen, Shi-Fan S., Simcoe, Robert A., Torrey, Paul, Bañados, Eduardo, Cooksey, Kathy, Cooper, Tom, Furesz, Gabor, Matejek, Michael, Miller, Daniel, Turner, Monica, Venemans, Bram, Decarli, Roberto, Farina, Emanuele P., Mazzucchelli, Chiara, Walter, Fabian
We present final statistics from a survey for intervening MgII absorption towards 100 quasars with emission redshifts between $z=3.55$ and $z=7.08$. Using infrared spectra from Magellan/FIRE, we detect 279 cosmological MgII absorbers, and confirm tha
Externí odkaz:
http://arxiv.org/abs/1612.02829
Autor:
Matejek, Michael Scott
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2012.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 185-198).
We present results from the first systematic survey for Mg ii absor
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 185-198).
We present results from the first systematic survey for Mg ii absor
Externí odkaz:
http://hdl.handle.net/1721.1/79521
Autor:
Zheng, Haoxuan, Tegmark, Max, Buza, Victor, Dillon, Joshua S., Gharibyan, Hrant, Hickish, Jack, Kunz, Eben, Liu, Adrian, Losh, Jon, Lutomirski, Andrew, Morrison, Scott, Narayanan, Sruthi, Perko, Ashley, Rosner, Devon, Sanchez, Nevada, Schutz, Katelin, Tribiano, Shana M., Valdez, Michael, Yang, Hung-I, Adami, Kristian Zarb, Zelko, Ioana, Zheng, Kevin, Armstrong, Richard, Bradley, Richard F., Dexter, Matthew R., Ewall-Wice, Aaron, Magro, Alessio, Matejek, Michael, Morgan, Edward, Neben, Abraham R., Pan, Qinxuan, Penna, Robert F., Peterson, Courtney M., Su, Meng, Villasenor, Joel, Williams, Christopher L., Zhu, Yan
We report on the MIT Epoch of Reionization (MITEoR) experiment, a pathfinder low-frequency radio interferometer whose goal is to test technologies that improve the calibration precision and reduce the cost of the high-sensitivity 3D mapping required
Externí odkaz:
http://arxiv.org/abs/1405.5527
Autor:
Zheng, Haoxuan, Tegmark, Max, Buza, Victor, Dillon, Joshua S., Gharibyan, Hrant, Hickish, Jack, Kunz, Eben, Liu, Adrian, Losh, Jon, Lutomirski, Andrew, Morrison, Scott, Narayanan, Sruthi, Perko, Ashley, Rosner, Devon, Sanchez, Nevada, Schutz, Katelin, Tribiano, Shana M., Zaldarriaga, Matias, Adami, Kristian Zarb, Zelko, Ioana, Zheng, Kevin, Armstrong, Richard, Bradley, Richard F., Dexter, Matthew R., Ewall-Wice, Aaron, Magro, Alessio, Matejek, Michael, Morgan, Edward, Neben, Abraham R., Pan, Qinxuan, Peterson, Courtney M., Su, Meng, Villasenor, Joel, Williams, Christopher L., Yang, Hung-I, Zhu, Yan
Mapping our universe in 3D by imaging the redshifted 21 cm line from neutral hydrogen has the potential to overtake the cosmic microwave background as our most powerful cosmological probe, because it can map a much larger volume of our Universe, shed
Externí odkaz:
http://arxiv.org/abs/1309.2639
Autor:
Simcoe, Robert A., Sullivan, Peter W., Cooksey, Kathy L., Kao, Melodie M., Matejek, Michael S., Burgasser, Adam J.
In typical astrophysical environments, the abundance of heavy elements ranges from 0.001 to 2 times the solar concentration. Lower abundances have been seen in select stars in the Milky Way's halo and in two quasar absorption systems at redshift z=3.
Externí odkaz:
http://arxiv.org/abs/1212.0548
We present a detailed study of HI and metals for 110 MgII absorption systems discovered at 1.98 <= z <= 5.33 in the infrared spectra of high redshift QSOs. Using new measurements of rest-frame UV lines from optical spectra of the same targets, we com
Externí odkaz:
http://arxiv.org/abs/1207.2470
Autor:
Matejek, Michael S., Simcoe, Robert A.
We present initial results from the first systematic survey for MgII quasar absorption lines at z > 2.5. Using infrared spectra of 46 high-redshift quasars, we discovered 111 MgII systems over a path covering 1.9 < z < 6.3. Five systems have z > 5, w
Externí odkaz:
http://arxiv.org/abs/1201.3919
Autor:
Simcoe, Robert A., Cooksey, Kathy L., Matejek, Michael E., Burgasser, Adam J., Bochanski, John, Lovegrove, Elizabeth, Bernstein, Rebecca A., Pipher, Judith L., Forrest, William J., McMurtry, Craig, Fan, Xiaohui, O'Meara, John
We present a new determination of the intergalactic CIV mass density at 4.3 < z < 6.3. Our constraints are derived from high signal-to-noise spectra of seven quasars at z > 5.8 obtained with the newly commissioned FIRE spectrograph on the Magellan Ba
Externí odkaz:
http://arxiv.org/abs/1104.4117
In radio astronomy, the correlator measures intensity in visibility space. In addition, the EoR power spectrum measured by an experiment such as the MWA is constructed in visibility space. Thus, correcting for the ionosphere in the uv-plane instead o
Externí odkaz:
http://arxiv.org/abs/0911.3942
Autor:
Lonsdale, Colin J., Cappallo, Roger J., Morales, Miguel F., Briggs, Frank H., Benkevitch, Leonid, Bowman, Judd D., Bunton, John D., Burns, Steven, Corey, Brian E., deSouza, Ludi, Doeleman, Sheperd S., Derome, Mark, Deshpande, Avinash, Gopalakrishna, M. R., Greenhill, Lincoln J., Herne, David, Hewitt, Jacqueline N., Kamini, P. A., Kasper, Justin C., Kincaid, Barton B., Kocz, Jonathan, Kowald, Errol, Kratzenberg, Eric, Kumar, Deepak, Lynch, Mervyn J., Madhavi, S., Matejek, Michael, Mitchell, Daniel, Morgan, Edward, Oberoi, Divya, Ord, Steven, Pathikulangara, Joseph, Prabu, T., Rogers, Alan E. E., Roshi, Anish, Salah, Joseph E., Sault, Robert J., Shankar, N. Udaya, Srivani, K. S., Stevens, Jamie, Tingay, Steven, Vaccarella, Annino, Waterson, Mark, Wayth, Randall B., Webster, Rachel L., Whitney, Alan R., Williams, Andrew, Williams, Christopher
The Murchison Widefield Array (MWA) is a dipole-based aperture array synthesis telescope designed to operate in the 80-300 MHz frequency range. It is capable of a wide range of science investigations, but is initially focused on three key science pro
Externí odkaz:
http://arxiv.org/abs/0903.1828