Zobrazeno 1 - 10
of 200
pro vyhledávání: '"David L Nidever"'
Autor:
Julie Imig, Cathryn Price, Jon A. Holtzman, Alexander Stone-Martinez, Steven R. Majewski, David H. Weinberg, Jennifer A. Johnson, Carlos Allende Prieto, Rachael L. Beaton, Timothy C. Beers, Dmitry Bizyaev, Michael R. Blanton, Joel R. Brownstein, Katia Cunha, José G. Fernández-Trincado, Diane K. Feuillet, Sten Hasselquist, Christian R. Hayes, Henrik Jönsson, Richard R. Lane, Jianhui Lian, Szabolcs Mészáros, David L. Nidever, Annie C. Robin, Matthew Shetrone, Verne Smith, John C. Wilson
Publikováno v:
The Astrophysical Journal, Vol 954, Iss 2, p 124 (2023)
We present new maps of the Milky Way disk showing the distribution of metallicity ([Fe/H]), α -element abundances ([Mg/Fe]), and stellar age, using a sample of 66,496 red giant stars from the final data release (DR17) of the Apache Point Observatory
Externí odkaz:
https://doaj.org/article/372a9bd65ffb4b6bb837d6786f2d6015
Autor:
Bethany R. Garver, David L. Nidever, Victor P. Debattista, Leandro Beraldo e Silva, Tigran Khachaturyants
Publikováno v:
The Astrophysical Journal, Vol 953, Iss 2, p 128 (2023)
The Milky Way (MW) stellar disk has both a thin and a thick component. The thin disk is composed mostly of younger stars (≲8 Gyr) with a lower abundance of α -elements, while the thick disk contains predominantly older stars (≳8–12 Gyr) with a
Externí odkaz:
https://doaj.org/article/e45e6ca550944a5daab4af620047d691
Autor:
Andrés Almeida, Scott F. Anderson, Maria Argudo-Fernández, Carles Badenes, Kat Barger, Jorge K. Barrera-Ballesteros, Chad F. Bender, Erika Benitez, Felipe Besser, Jonathan C. Bird, Dmitry Bizyaev, Michael R. Blanton, John Bochanski, Jo Bovy, William Nielsen Brandt, Joel R. Brownstein, Johannes Buchner, Esra Bulbul, Joseph N. Burchett, Mariana Cano Díaz, Joleen K. Carlberg, Andrew R. Casey, Vedant Chandra, Brian Cherinka, Cristina Chiappini, Abigail A. Coker, Johan Comparat, Charlie Conroy, Gabriella Contardo, Arlin Cortes, Kevin Covey, Jeffrey D. Crane, Katia Cunha, Collin Dabbieri, James W. Davidson Jr, Megan C. Davis, Anna Barbara de Andrade Queiroz, Nathan De Lee, José Eduardo Méndez Delgado, Sebastian Demasi, Francesco Di Mille, John Donor, Peter Dow, Tom Dwelly, Mike Eracleous, Jamey Eriksen, Xiaohui Fan, Emily Farr, Sara Frederick, Logan Fries, Peter Frinchaboy, Boris T. Gänsicke, Junqiang Ge, Consuelo González Ávila, Katie Grabowski, Catherine Grier, Guillaume Guiglion, Pramod Gupta, Patrick Hall, Keith Hawkins, Christian R. Hayes, J. J. Hermes, Lorena Hernández-García, David W. Hogg, Jon A. Holtzman, Hector Javier Ibarra-Medel, Alexander Ji, Paula Jofre, Jennifer A. Johnson, Amy M. Jones, Karen Kinemuchi, Matthias Kluge, Anton Koekemoer, Juna A. Kollmeier, Marina Kounkel, Dhanesh Krishnarao, Mirko Krumpe, Ivan Lacerna, Paulo Jakson Assuncao Lago, Chervin Laporte, Chao Liu, Ang Liu, Xin Liu, Alexandre Roman Lopes, Matin Macktoobian, Steven R. Majewski, Viktor Malanushenko, Dan Maoz, Thomas Masseron, Karen L. Masters, Gal Matijevic, Aidan McBride, Ilija Medan, Andrea Merloni, Sean Morrison, Natalie Myers, Szabolcs Mészáros, C. Alenka Negrete, David L. Nidever, Christian Nitschelm, Daniel Oravetz, Audrey Oravetz, Kaike Pan, Yingjie Peng, Marc H. Pinsonneault, Rick Pogge, Dan Qiu, Solange V. Ramirez, Hans-Walter Rix, Daniela Fernández Rosso, Jessie Runnoe, Mara Salvato, Sebastian F. Sanchez, Felipe A. Santana, Andrew Saydjari, Conor Sayres, Kevin C. Schlaufman, Donald P. Schneider, Axel Schwope, Javier Serna, Yue Shen, Jennifer Sobeck, Ying-Yi Song, Diogo Souto, Taylor Spoo, Keivan G. Stassun, Matthias Steinmetz, Ilya Straumit, Guy Stringfellow, José Sánchez-Gallego, Manuchehr Taghizadeh-Popp, Jamie Tayar, Ani Thakar, Patricia B. Tissera, Andrew Tkachenko, Hector Hernandez Toledo, Benny Trakhtenbrot, José G. Fernández-Trincado, Nicholas Troup, Jonathan R. Trump, Sarah Tuttle, Natalie Ulloa, Jose Antonio Vazquez-Mata, Pablo Vera Alfaro, Sandro Villanova, Stefanie Wachter, Anne-Marie Weijmans, Adam Wheeler, John Wilson, Leigh Wojno, Julien Wolf, Xiang-Xiang Xue, Jason E. Ybarra, Eleonora Zari, Gail Zasowski
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 267, Iss 2, p 44 (2023)
The eighteenth data release (DR18) of the Sloan Digital Sky Survey (SDSS) is the first one for SDSS-V, the fifth generation of the survey. SDSS-V comprises three primary scientific programs or “Mappers”: the Milky Way Mapper (MWM), the Black Hole
Externí odkaz:
https://doaj.org/article/c316293bd0cb4069bc0c64377b2d0cef
Autor:
Victor P. Debattista, David J. Liddicott, Oscar A. Gonzalez, Leandro Beraldo e Silva, João A. S. Amarante, Ilin Lazar, Manuela Zoccali, Elena Valenti, Deanne B. Fisher, Tigran Khachaturyants, David L. Nidever, Thomas R. Quinn, Min Du, Susan Kassin
Publikováno v:
The Astrophysical Journal, Vol 946, Iss 2, p 118 (2023)
In Paper I, we showed that clumps in high-redshift galaxies, having a high star formation rate density (Σ _SFR ), produce disks with two tracks in the [Fe/H]–[ α /Fe] chemical space, similar to that of the Milky Way’s (MW’s) thin+thick disks.
Externí odkaz:
https://doaj.org/article/0540b9380dfd44b5b6174d24e5833703
Autor:
S Drew Chojnowski, Swetlana Hubrig, David L Nidever, Ewa Niemczura, Jonathan Labadie-Bartz, Gautier Mathys, Sten Hasselquist
Despite the Universe containing primordial thorium (Th) of sufficient abundance to appear in stellar spectra, detection of Th has to date been tentative and based on just a few weak and blended lines. Here, we present convincing evidence not only for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::82c79433854998dbf80cbca6cf047a86
http://arxiv.org/abs/2304.12938
http://arxiv.org/abs/2304.12938
Autor:
Cameron P M Bell, Maria-Rosa L Cioni, Angus H Wright, David L Nidever, I-Da Chiang, Samyaday Choudhury, Martin A T Groenewegen, Clara M Pennock, Yumi Choi, Richard de Grijs, Valentin D Ivanov, Pol Massana, Ambra Nanni, Noelia E D Noël, Knut Olsen, Jacco Th van Loon, A Katherina Vivas, Dennis Zaritsky
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 516:824-840
We present a map of the total intrinsic reddening across ~90 deg$^{2}$ of the Large Magellanic Cloud (LMC) derived using optical (ugriz) and near-infrared (IR; YJKs) spectral energy distributions (SEDs) of background galaxies. The reddening map is cr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4a79f7f72ab60ca4eea1e098a97d724d
https://doi.org/10.1093/mnras/stac1545
https://doi.org/10.1093/mnras/stac1545
Autor:
Christine Mazzola Daher, Sten Hasselquist, Steven R. Majewski, Kaike Pan, Dmitry Bizyaev, Nathan De Lee, D. Godoy-Rivera, Alexandre Roman-Lopes, Hannah M. Lewis, Keivan G. Stassun, Audrey Oravetz, Carles Badenes, Borja Anguiano, David L. Nidever, Christian Nitschelm
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 509:3355-3370
We present a search for close, unresolved companions in a subset of spatially resolved Gaia wide binaries containing main-sequence stars within 200 pc of the Sun, utilizing the APOGEE–Gaia Wide Binary Catalog. A catalogue of 37 wide binaries was cr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b96cb708bff9952a1d29be2581a8baa4
https://doi.org/10.1093/mnras/stab2349
https://doi.org/10.1093/mnras/stab2349
Autor:
S Drew Chojnowski, Swetlana Hubrig, Jonathan Labadie-Bartz, Thomas Rivinius, Markus Schöller, Ewa Niemczura, David L Nidever, Amelia M Stutz, C A Hummel
We report the discovery of a new example of the rare class of highly magnetized, rapidly rotating, helium enhanced, early B stars that produce anomalously wide hydrogen emission due to a centrifugal magnetosphere (CM). The star is Trumpler 16-26, a B
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::665b17b8568da42ca11bca1135f5a02f
http://arxiv.org/abs/2208.12722
http://arxiv.org/abs/2208.12722
Autor:
Xinlun Cheng, Yumi Choi, Knut Olsen, David L. Nidever, Steven R. Majewski, Antonela Monachesi, Gurtina Besla, César Muñoz Gonzalez, Borja Anguiano, Andres Almeida, Ricardo R. Muñoz, Richard R. Lane, Christian Nitschelm
We report the first 3D kinematical measurements of 88 stars in the direction of several recently discovered substructures in the southern periphery of the Large Magellanic Cloud (LMC) using a combination of Gaia proper motions and radial velocities f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b92e456beb6bd43890b3e79c285781ac
http://arxiv.org/abs/2202.12789
http://arxiv.org/abs/2202.12789
Autor:
Yumi Choi, Knut A. G. Olsen, Gurtina Besla, Roeland P. van der Marel, Paul Zivick, Nitya Kallivayalil, David L. Nidever
We present analysis of the proper-motion (PM) field of the red clump stars in the Large Magellanic Cloud (LMC) disk using the Gaia Early Data Release 3 catalog. Using a kinematic model based on old stars with 3D velocity measurements, we construct th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::51f3f5c3c87239f28c7423c3c1a0522c