Zobrazeno 1 - 10
of 60
pro vyhledávání: '"SNEDEN, Chris"'
Autor:
Garro, Elisa R., Fernández-Trincado, José G., Minniti, Dante, Moya, Wisthon H., Palma, Tali, Beers, Timothy C., Placco, Vinicius M., Barbuy, Beatriz, Sneden, Chris, Alves-Brito, Alan, Dias, Bruno, Afşar, Melike, Frelijj, Heinz, Lane, Richard R.
Publikováno v:
A&A 669, A136 (2023)
The recent exquisite Gaia astrometric, photometric, and radial velocity (RV) measurements resulted in a substantial advancement for the determination of the orbits for old star clusters, including the oldest Milky Way globular clusters (MW GCs). The
Externí odkaz:
http://arxiv.org/abs/2212.02337
The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) Survey Design, Reductions, and Detections
Autor:
Gebhardt, Karl, Cooper, Erin Mentuch, Ciardullo, Robin, Acquaviva, Viviana, Bender, Ralf, Bowman, William P., Castanheira, Barbara G., Dalton, Gavin, Davis, Dustin, de Jong, Roelof S., DePoy, D. L., Devarakonda, Yaswant, Dongsheng, Sun, Drory, Niv, Fabricius, Maximilian, Farrow, Daniel J., Feldmeier, John, Finkelstein, Steven L., Froning, Cynthia S., Gawiser, Eric, Gronwall, Caryl, Herold, Laura, Hill, Gary J., Hopp, Ulrich, House, Lindsay R., Janowiecki, Steven, Jarvis, Matthew, Jeong, Donghui, Jogee, Shardha, Kakuma, Ryota, Kelz, Andreas, Kollatschny, W., Komatsu, Eiichiro, Krumpe, Mirko, Landriau, Martin, Liu, Chenxu, Niemeyer, Maja Lujan, MacQueen, Phillip, Marshall, Jennifer, Mawatari, Ken, McLinden, Emily M., Mukae, Shiro, Nagaraj, Gautam, Ono, Yoshiaki, Ouchi, Masami, Papovich, Casey, Sakai, Nao, Saito, Shun, Schneider, Donald P., Schulze, Andreas, Shanmugasundararaj, Khavvia, Shetrone, Matthew, Sneden, Chris, Snigula, Jan, Steinmetz, Matthias, Thomas, Benjamin P., Thomas, Brianna, Tuttle, Sarah, Urrutia, Tanya, Wisotzki, Lutz, Wold, Isak, Zeimann, Gregory, Zhang, Yechi
We describe the survey design, calibration, commissioning, and emission-line detection algorithms for the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). The goal of HETDEX is to measure the redshifts of over a million Ly$\alpha$ emitting gal
Externí odkaz:
http://arxiv.org/abs/2110.04298
Autor:
Hill, Gary J., Lee, Hanshin, MacQueen, Phillip J., Kelz, Andreas, Drory, Niv, Vattiat, Brian L., Good, John M., Ramsey, Jason, Kriel, Herman, Peterson, Trent, DePoy, D. L., Gebhardt, Karl, Marshall, J. L., Tuttle, Sarah E., Bauer, Svend M., Chonis, Taylor S., Fabricius, Maximilian H., Froning, Cynthia, Haeuser, Marco, Indahl, Briana L., Jahn, Thomas, Landriau, Martin, Leck, Ron, Montesano, Francesco, Prochaska, Travis, Snigula, Jan M., Zeimann, Gregory R., Bryant, Randy, Damm, George, Fowler, J. R., Janowiecki, Steven, Martin, Jerry, Mrozinski, Emily, Odewahn, Stephen, Rostopchin, Sergey, Shetrone, Matthew, Spencer, Renny, Cooper, Erin Mentuch, Armandroff, Taft, Bender, Ralf, Dalton, Gavin, Hopp, Ulrich, Komatsu, Eiichiro, Nicklas, Harald, Ramsey, Lawrence W., Roth, Martin M., Schneider, Donald P., Sneden, Chris, Steinmetz, Matthias
Publikováno v:
AJ 162 298 (2021)
The Hobby-Eberly Telescope (HET) Dark Energy Experiment (HETDEX) is undertaking a blind wide-field low-resolution spectroscopic survey of 540 square degrees of sky to identify and derive redshifts for a million Lyman-alpha emitting galaxies (LAEs) in
Externí odkaz:
http://arxiv.org/abs/2110.03843
Autor:
Hawkins, Keith, Zeimann, Greg, Sneden, Chris, Cooper, Erin Mentuch, Gebhardt, Karl, Bond, Howard E., Carrillo, Andreia, Casey, Caitlin M., Castanheira, Barbara G., Ciardullo, Robin, Davis, Dustin, Farrow, Daniel J., Finkelstein, Steven L., Hill, Gary J., Kelz, Andreas, Liu, Chenxu, Shetrone, Matthew, Schneider, Donald P., Starkenburg, Else, Steinmetz, Matthias, Wheeler, Craig
The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) is an unbiased, massively multiplexed spectroscopic survey, designed to measure the expansion history of the universe through low-resolution ($R\sim750$) spectra of Lyman-Alpha Emitters. In i
Externí odkaz:
http://arxiv.org/abs/2102.06224
Autor:
Kielty, Collin L., Venn, Kim A., Sestito, Federico, Starkenburg, Else, Martin, Nicolas F., Aguado, David S., Arentsen, Anke, Fabbro, Sébastien, Hernández, Jonay I. González, Hill, Vanessa, Jablonka, Pascale, Lardo, Carmela, Mashonkina, Lyudmila I., Navarro, Julio F., Sneden, Chris, Thomas, Guillaume F., Youakim, Kris, Bialek, Spencer, Sánchez-Janssen, Rubén
High-resolution optical spectra of 30 metal-poor stars selected from the \Pristine\ survey are presented, based on observations taken with the Gemini Observatory GRACES spectrograph. Stellar parameters \teff and \logg are determined using a Gaia DR2
Externí odkaz:
http://arxiv.org/abs/2012.03960
Autor:
Venn, Kim, Kielty, Collin, Sestito, Federico, Starkenburg, Else, Martin, Nicolas, Aguado, David S., Arentsen, Anke, Bonifacio, Piercarlo, Caffau, Elisabetta, Hill, Vanessa, Jablonka, Pascale, Lardo, Carmela, Mashonkina, Lyudmilla, Navarro, Julio F., Sneden, Chris, Thomas, Guillaume, Youakim, Kris, Gonzalez-Hernandez, Jonay I., Janssen, Ruben Sanchez, Carlberg, Ray, Malhan, Khyati
A chemo-dynamical analysis of 115 metal-poor candidate stars selected from the narrow-band Pristine photometric survey is presented based on CFHT high-resolution ESPaDoNS spectroscopy. We have discover 28 new bright (V < 15) stars with [Fe/H]<-2.5 an
Externí odkaz:
http://arxiv.org/abs/1910.06340
Autor:
Carretta, Eugenio, Bragaglia, Angela, Lucatello, Sara, D'Orazi, Valentina, Gratton, Raffaele G., Donati, Paolo, Sollima, Antonio, Sneden, Chris
As part of our on-going project on the homogeneous chemical characterization of multiple stellar populations in globular clusters (GCs), we studied NGC 5634, associated to the Sagittarius dwarf spheroidal galaxy, using high-resolution spectroscopy of
Externí odkaz:
http://arxiv.org/abs/1701.03116
Autor:
Schaeuble, Marc, Preston, George, Sneden, Chris, Thompson, I. B., Shectman, S. A., Burley, G. S.
In this paper, we present a detailed high-resolution spectroscopic study of post main sequence stars in the Globular Cluster M68. Our sample, which covers a range of 4000 K in $T_{eff}$, and 3.5 dex in $log(g)$, is comprised of members from the red g
Externí odkaz:
http://arxiv.org/abs/1505.03513
Autor:
Roederer, Ian U., Cowan, John J., Preston, George W., Shectman, Stephen A., Sneden, Chris, Thompson, Ian B.
We report the discovery of nine metal-poor stars with high levels of r-process enhancement (+0.81<[Eu/Fe]<+1.13), including six subgiants and three stars on the red horizontal branch. We also analyze four previously-known r-process-enhanced metal-poo
Externí odkaz:
http://arxiv.org/abs/1409.5810
Recent studies suggest that metal-poor stars enhanced in carbon but containing low levels of neutron-capture elements may have been among the first to incorporate the nucleosynthesis products of the first generation of stars. We have observed 16 star
Externí odkaz:
http://arxiv.org/abs/1402.4144