Zobrazeno 1 - 10
of 525
pro vyhledávání: '"R. Covey"'
Autor:
Evan Butler, Andrea Kunder, Zdenek Prudil, Kevin R. Covey, Macy Ball, Carlos Campos, Kaylen Gollnick, Julio Olivares Carvajal, Joanne Hughes, Kathryn Devine, Christian I. Johnson, A. Katherina Vivas, R. Michael Rich, Meridith Joyce, Iulia T. Simion, Tommaso Marchetti, Andreas J. Koch-Hansen, William I. Clarkson, Rebekah Kuss
Publikováno v:
The Astrophysical Journal Letters, Vol 963, Iss 1, p L33 (2024)
Patchick 99 is a candidate globular cluster located in the direction of the Galactic bulge, with a proper motion almost identical to the field and extreme field star contamination. A recent analysis suggests it is a low-luminosity globular cluster wi
Externí odkaz:
https://doaj.org/article/79909a585b8244678aad812edb9bd4b0
Autor:
Sining Zhu, Almin I. Lalani, Juan Jin, Derek Sant’Angelo, Lori R. Covey, Kebin Liu, Howard A. Young, Suzanne Ostrand-Rosenberg, Ping Xie
Publikováno v:
Frontiers in Immunology, Vol 14 (2023)
Myeloid-derived suppressor cells (MDSCs) are aberrantly expanded in cancer patients and under other pathological conditions. These cells orchestrate the immunosuppressive and inflammatory network to facilitate cancer metastasis and mediate patient re
Externí odkaz:
https://doaj.org/article/3745c414f1a94151b2992fbbc561abf7
Autor:
Chih-Chun Hsu, Adam J. Burgasser, Christopher A. Theissen, Jessica L. Birky, Christian Aganze, Roman Gerasimov, Sarah J. Schmidt, Cullen H. Blake, Kevin R. Covey, Elizabeth Moreno-Hilario, Christopher R. Gelino, Javier Serna, Joel R. Brownstein, Katia Cunha
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 274, Iss 2, p 40 (2024)
We present precise measurements of radial (RV) and projected rotational ( $v\sin i$ ) velocities of a sample of 258 M6 to L2 dwarfs with multiepoch, high-resolution ( λ /Δ λ = 22,500), near-infrared (1.514–1.696 μ m) spectroscopic observations
Externí odkaz:
https://doaj.org/article/2d566a9a22f047eda558d614d6083c55
Autor:
Andrea Kunder, Zdenek Prudil, Claire Skaggs, Henrique Reggiani, David M. Nataf, Joanne Hughes, Kevin R. Covey, Kathryn Devine
Publikováno v:
The Astronomical Journal, Vol 168, Iss 3, p 139 (2024)
RR Lyrae stars (RRLs) are excellent tracers of stellar populations for old, metal-poor components in the the Milky Way and the Local Group. Their luminosities have a metallicity dependence, but determining spectroscopic [Fe/H] metallicities for RRLs,
Externí odkaz:
https://doaj.org/article/5f404adb8780425fad812f12465dc21c
Autor:
Alejandro Núñez, Marcel A. Agüeros, Jason L. Curtis, Kevin R. Covey, Stephanie T. Douglas, Sabine R. Chu, Stanislav DeLaurentiis, Minzhi (Luna) Wang, Jeremy J. Drake
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 1, p 12 (2024)
Low-mass (≲1.2 M _⊙ ) main-sequence stars lose angular momentum over time, leading to a decrease in their magnetic activity. The details of this rotation–activity relation remain poorly understood, however. Using observations of members of the
Externí odkaz:
https://doaj.org/article/92ceda790eba4c13a4b1ba6152c5a793
Autor:
Charles Bettigole, Juliana Hanle, Daniel A. Kane, Zoe Pagliaro, Shaylan Kolodney, Sylvana Szuhay, Miles Chandler, Eli Hersh, Stephen A. Wood, Bruno Basso, Douglas Jeffrey Goodwin, Shane Hardy, Zachary Wolf, Kristofer R. Covey
Publikováno v:
Soil Systems, Vol 7, Iss 1, p 27 (2023)
Soils comprise the largest pool of terrestrial carbon yet have lost significant stocks due to human activity. Changes to land management in cropland and grazing systems present opportunities to sequester carbon in soils at large scales. Uncertainty i
Externí odkaz:
https://doaj.org/article/c0c6e3b44a774877bdef01ebda2a27e8
Autor:
Andrea Kunder, Zdenek Prudil, Kevin R. Covey, Joanne Hughes, Meridith Joyce, Iulia T. Simion, Rebekah Kuss, Carlos Campos, Christian I. Johnson, Catherine A. Pilachowski, Kristen A. Larson, Andreas J. Koch-Hansen, Tommaso Marchetti, Michael R. Rich, Evan Butler, William I. Clarkson, Michael Rivet, Kathryn Devine, A. Katherina Vivas, Gabriel I. Perren, Mario Soto, Erika Silva
Publikováno v:
The Astronomical Journal, Vol 167, Iss 1, p 21 (2023)
The Milky Way Bulge extra-tidal star survey is a spectroscopic survey with the goal of identifying stripped globular cluster stars from inner Galaxy clusters. In this way, an indication of the fraction of metal-poor bulge stars that originated from g
Externí odkaz:
https://doaj.org/article/bd7576781348448f979e8e46a6dac052
Autor:
Carlos G. Román-Zúñiga, Marina Kounkel, Jesús Hernández, Karla Peña Ramírez, Ricardo López-Valdivia, Kevin R. Covey, Amelia M. Stutz, Alexandre Roman-Lopes, Hunter Campbell, Elliott Khilfeh, Mauricio Tapia, Guy S. Stringfellow, Juan José Downes, Keivan G. Stassun, Dante Minniti, Amelia Bayo, Jinyoung Serena Kim, Genaro Suárez, Jason E. Ybarra, José G. Fernández-Trincado, Penélope Longa-Peña, Valeria Ramírez-Preciado, Javier Serna, Richard R. Lane, D. A. García-Hernández, Rachael L. Beaton, Dmitry Bizyaev, Kaike Pan
Publikováno v:
The Astronomical Journal, Vol 165, Iss 2, p 51 (2023)
The Sloan Digital Sky Survey IV APOGEE-2 primary science goal was to observe red giant stars throughout the Galaxy to study its dynamics, morphology, and chemical evolution. The APOGEE instrument, a high-resolution 300-fiber H -band (1.55–1.71 μ m
Externí odkaz:
https://doaj.org/article/8aa936f30c1e4a089541f766e56ade5b