Zobrazeno 1 - 10
of 206
pro vyhledávání: '"Walker, Alistair R."'
Autor:
Nidever, David L., Olsen, Knut, Walker, Alistair R., Vivas, A. Katherina, Blum, Robert D., Kaleida, Catherine, Choi, Yumi, Conn, Blair C., Gruendl, Robert A., Bell, Eric F., Besla, Gurtina, Muñoz, Ricardo R., Gallart, Carme, Martin, Nicolas F., Olszewski, Edward W., Saha, Abhijit, Monachesi, Antonela, Monelli, Matteo, de Boer, Thomas J. L., Johnson, L. Clifton, Zaritsky, Dennis, Stringfellow, Guy S., van der Marel, Roeland P., Cioni, Maria-Rosa L., Jin, Shoko, Majewski, Steven R., Martinez-Delgado, David, Monteagudo, Lara, Noël, Noelia E. D., Bernard, Edouard J., Kunder, Andrea, Chu, You-Hua, Bell, Cameron P. M., Santana, Felipe, Frechem, Joshua, Medina, Gustavo E., Parkash, Vaishali, Navarrete, J. C. Serón, Hayes, Christian
The Large and Small Magellanic Clouds are unique local laboratories for studying the formation and evolution of small galaxies in exquisite detail. The Survey of the MAgellanic Stellar History (SMASH) is an NOAO community Dark Energy Camera (DECam) s
Externí odkaz:
http://hdl.handle.net/10150/626050
http://arizona.openrepository.com/arizona/handle/10150/626050
http://arizona.openrepository.com/arizona/handle/10150/626050
Autor:
Martin, Nicolas F., Jungbluth, Valentin, Nidever, David L., Bell, Eric F., Besla, Gurtina, Blum, Robert D., Cioni, Maria-Rosa L., Conn, Blair C., Kaleida, Catherine C., Gallart, Carme, Jin, Shoko, Majewski, Steven R., Martinez-Delgado, David, Monachesi, Antonela, Muñoz, Ricardo R., Noël, Noelia E. D., Olsen, Knut, Stringfellow, Guy S., van der Marel, Roeland P., Vivas, A. Katherina, Walker, Alistair R., Zaritsky, Dennis
We present the discovery of a very faint stellar system, SMASH 1, that is potentially a satellite of the Large Magellanic Cloud. Found within the Survey of the MAgellanic Stellar History (SMASH), SMASH 1 is a compact (r(h) 9.1(-3.4)(+5.9)pc) and very
Externí odkaz:
http://hdl.handle.net/10150/621946
http://arizona.openrepository.com/arizona/handle/10150/621946
http://arizona.openrepository.com/arizona/handle/10150/621946
Autor:
Wold, Isak G. B., Malhotra, Sangeeta, Rhoads, James, Wang, Junxian, Hu, Weida, Perez, Lucia A., Zheng, Zhen-Ya, Khostovan, Ali Ahmad, Walker, Alistair R., Barrientos, L. Felipe, González-López, Jorge, Harish, Santosh, Infante, Leopoldo, Jiang, Chunyan, Pharo, John, Moya-Sierralta, Cristóbal, Bauer, Franz E., Galaz, Gaspar, Valdes, Francisco, Yang, Huan
We present a new measurement of the Ly$\alpha$ luminosity function at redshift $z=6.9$, finding moderate evolution from $z=5.7$ that is consistent with a fully or largely ionized $z\sim7$ intergalactic medium. Our result is based on four fields of th
Externí odkaz:
http://arxiv.org/abs/2105.12191
Autor:
Khostovan, Ali Ahmad, Malhotra, Sangeeta, Rhoads, James E., Harish, Santosh, Jiang, Chunyan, Wang, Junxian, Wold, Isak, Zheng, Zhen-Ya, Barrientos, L. Felipe, Coughlin, Alicia, Hu, Weida, Infante, Leopoldo, Perez, Lucia A., Pharo, John, Valdes, Francisco, Walker, Alistair R.
The H$\alpha$ equivalent width (EW) is an observational proxy for specific star formation rate (sSFR) and a tracer of episodic star-formation activity. Previous assessments show that EW strongly anti-correlates with stellar mass as $M^{-0.25}$ simila
Externí odkaz:
http://arxiv.org/abs/2103.10959
Autor:
Hu, Weida, Wang, Junxian, Infante, Leopoldo, Rhoads, James E., Zheng, Zhen-Ya, Yang, Huan, Malhotra, Sangeeta, Barrientos, L. Felipe, Jiang, Chunyan, González-López, Jorge, Prieto, Gonzalo, Perez, Lucia A., Hibon, Pascale, Galaz, Gaspar, Coughlin, Alicia, Harish, Santosh, Kong, Xu, Kang, Wenyong, Khostovan, Ali Ahmad, Pharo, John, Valdes, Francisco, Wold, Isak, Walker, Alistair R., Zheng, XianZhong
Protoclusters, the progenitors of the most massive structures in the Universe, have been identified at redshifts of up to 6.6. Besides exploring early structure formation, searching for protoclusters at even higher redshifts is particularly useful to
Externí odkaz:
http://arxiv.org/abs/2101.10204
Autor:
Nidever, David L., Olsen, Knut, Choi, Yumi, Ruiz-Lara, Tomas, Miller, Amy E., Johnson, L. Clifton, Bell, Cameron P. M., Blum, Robert D., Cioni, Maria-Rosa L., Gallart, Carme, Majewski, Steven R., Martin, Nicolas F., Massana, Pol, Monachesi, Antonela, Noel, Noelia E. D., Sakowska, Joanna D., van der Marel, Roeland P., Walker, Alistair R., Zaritsky, Dennis, Bell, Eric F., Conn, Blair C., de Boer, Thomas J. L., Gruendl, Robert A., Monelli, Matteo, Munoz, Ricardo R., Saha, Abhijit, Vivas, A. Katherina, Bernard, Edouard, Besla, Gurtina, Carballo-Bello, Julio A., Dorta, Antonio, Martinez-Delgado, David, Goater, Alex, Rusakov, Vadim, Stringfellow, Guy S.
The Large and Small Magellanic Clouds (LMC and SMC) are the largest satellite galaxies of the Milky Way and close enough to allow for a detailed exploration of their structure and formation history. The Survey of the MAgellanic Stellar History (SMASH
Externí odkaz:
http://arxiv.org/abs/2011.13943
Candidate Periodically Variable Quasars from the Dark Energy Survey and the Sloan Digital Sky Survey
Autor:
Chen, Yu-Ching, Liu, Xin, Liao, Wei-Ting, Holgado, A. Miguel, Guo, Hengxiao, Gruendl, Robert A., Morganson, Eric, Shen, Yue, Zhang, Kaiwen, Abbott, Tim M. C., Aguena, Michel, Allam, Sahar, Avila, Santiago, Bertin, Emmanuel, Bhargava, Sunayana, Brooks, David, Burke, David L., Rosell, Aurelio Carnero, Carollo, Daniela, Kind, Matias Carrasco, Carretero, Jorge, Costanzi, Matteo, da Costa, Luiz N., Davis, Tamara M., De Vicente, Juan, Desai, Shantanu, Diehl, H. Thomas, Doel, Peter, Everett, Spencer, Flaugher, Brenna, Friedel, Douglas, Frieman, Joshua, García-Bellido, Juan, Gaztanaga, Enrique, Glazebrook, Karl, Gruen, Daniel, Gutierrez, Gaston, Hinton, Samuel R., Hollowood, Devon L., James, David J., Kim, Alex G., Kuehn, Kyler, Kuropatkin, Nikolay, Lewis, Geraint F., Lidman, Christopher, Lima, Marcos, Maia, Marcio A. G., March, Marisa, Marshall, Jennifer L., Menanteau, Felipe, Miquel, Ramon, Palmese, Antonella, Paz-Chinchón, Francisco, Plazas, Andrés A., Sanchez, Eusebio, Schubnell, Michael, Serrano, Santiago, Sevilla-Noarbe, Ignacio, Smith, Mathew, Suchyta, Eric, Swanson, Molly E. C., Tarle, Gregory, Tucker, Brad E., Varga, Tamas Norbert, Walker, Alistair R.
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 499, Issue 2, pp.2245-2264 (2020)
Periodically variable quasars have been suggested as close binary supermassive black holes. We present a systematic search for periodic light curves in 625 spectroscopically confirmed quasars with a median redshift of 1.8 in a 4.6 deg$^2$ overlapping
Externí odkaz:
http://arxiv.org/abs/2008.12329
Autor:
Massana, Pol, Noël, Noelia E. D., Nidever, David L., Erkal, Denis, de Boer, Thomas J. L., Choi, Yumi, Majewski, Steven R., Olsen, Knut, Monachesi, Antonela, Gallart, Carme, van der Marel, Roeland P., Ruiz-Lara, Tomás, Zaritsky, Dennis, Martin, Nicolas F., Muñoz, Ricardo R., Cioni, Maria-Rosa L., Bell, Cameron P. M., Bell, Eric F., Stringfellow, Guy S., Belokurov, Vasily, Monelli, Matteo, Walker, Alistair R., Martínez-Delgado, David, Vivas, A. Katherina, Conn, Blair C.
The periphery of the Small Magellanic Cloud (SMC) can unlock important information regarding galaxy formation and evolution in interacting systems. Here, we present a detailed study of the extended stellar structure of the SMC using deep colour-magni
Externí odkaz:
http://arxiv.org/abs/2008.00012
Autor:
Burke, Colin J., Baldassare, Vivienne F., Liu, Xin, Foley, Ryan J., Shen, Yue, Palmese, Antonella, Guo, Hengxiao, Herner, Kenneth, Abbott, Tim M. C., Aguena, Michel, Allam, Sahar, Avila, Santiago, Bertin, Emmanuel, Brooks, David, Rosell, Aurelio Carnero, Kind, Matias Carrasco, Carretero, Jorge, da Costa, Luiz N., De Vicente, Juan, Desai, Shantanu, Doel, Peter, Eifler, Tim F., Everett, Spencer, Frieman, Josh, Garcia-Bellido, Juan, Gaztanaga, Enrique, Gruen, Daniel, Gruendl, Robert A., Gschwend, Julia, Gutierrez, Gaston, Hollowood, Devon L., Honscheid, Klaus, James, David J., Krause, Elisabeth, Kuehn, Kyler, Maia, Marcio A. G., Menanteau, Felipe, Miquel, Ramon, Paz-Chinchon, Francisco, Plazas, Andres A., Sanchez, Eusebio, Santiago, Basilio, Scarpine, Vic, Serrano, Santiago, Sevilla-Noarbe, Ignacio, Smith, Mathew, Soares-Santos, Marcelle, Suchyta, Eric, Swanson, Molly E. C., Tarle, Gregory, Tucker, Douglas L., Varga, Tamas Norbert, Walker, Alistair R., Collaboration, DES
Publikováno v:
The Astrophysical Journal Letters, Volume 894, Issue 1, id.L5 (2020)
We report on small-amplitude optical variability and recent dissipation of the unusually persistent broad emission lines in the blue compact dwarf galaxy PHL 293B. The galaxy's unusual spectral features (P Cygni-like profiles with $\sim$800 km s$^{-1
Externí odkaz:
http://arxiv.org/abs/2002.12369
Autor:
Burleigh, Kaylan J., Landriau, Martin, Dey, Arjun, Lang, Dustin, Schlegel, David J., Nugent, Peter E., Blum, Robert, Findlay, Joseph R., Finkbeiner, Douglas P., Herrera, David, Honscheid, Klaus, Juneau, Stéphanie, McGreer, Ian, Meisner, Aaron M., Moustakas, John, Myers, Adam D., Patej, Anna, Schlafly, Edward F., Valdes, Francisco, Walker, Alistair R., Weaver, Benjamin A., Yèche, Christophe
Publikováno v:
AJ, 160:61 (2020)
The Legacy Surveys, a combination of three ground-based imaging surveys, have mapped 16,000 deg$^2$ in three optical bands ($g$, $r$, and $z$) to a depth 1--$2$~mag deeper than the Sloan Digital Sky Survey (SDSS). Our work addresses one of the major
Externí odkaz:
http://arxiv.org/abs/2002.05828