Zobrazeno 1 - 10
of 221
pro vyhledávání: '"Richard R Lane"'
Autor:
Javier Serna, Giovanni Pinzón, Jesús Hernández, Ezequiel Manzo-Martínez, Karina Mauco, Carlos G. Román-Zúñiga, Nuria Calvet, Cesar Briceño, Ricardo López-Valdivia, Marina Kounkel, Guy S. Stringfellow, Keivan G. Stassun, Marc Pinsonneault, Lucia Adame, Lyra Cao, Kevin Covey, Amelia Bayo, Alexandre Roman-Lopes, Christian Nitschelm, Richard R. Lane
Publikováno v:
The Astrophysical Journal, Vol 968, Iss 2, p 68 (2024)
We developed a grid of stellar rotation models for low-mass and solar-type classical T Tauri stars (CTTS; 0.3 M _⊙ < M _* < 1.2 M _⊙ ). These models incorporate the star–disk interaction and magnetospheric ejections to investigate the evolution
Externí odkaz:
https://doaj.org/article/3f2ebec67a004852aaa455cd3837a8a2
Publikováno v:
The Astrophysical Journal, Vol 959, Iss 2, p 123 (2023)
The success of galactic archeology and the reconstruction of the formation history of our Galaxy relies critically on precise ages for large populations of stars. For evolved stars in the red clump and red giant branch, the carbon-to-nitrogen ratio (
Externí odkaz:
https://doaj.org/article/25f06479ec004f7ab4f6a8a5a6d39847
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:
Fábio Wanderley, Katia Cunha, Diogo Souto, Verne V. Smith, Lyra Cao, Marc Pinsonneault, C. Allende Prieto, Kevin Covey, Thomas Masseron, Ilaria Pascucci, Keivan G. Stassun, Ryan Terrien, Galen J. Bergsten, Dmitry Bizyaev, José G. Fernández-Trincado, Henrik Jönsson, Sten Hasselquist, Jon A. Holtzman, Richard R. Lane, Suvrath Mahadevan, Steven R. Majewski, Dante Minniti, Kaike Pan, Javier Serna, Jennifer Sobeck, Guy S. Stringfellow
Publikováno v:
The Astrophysical Journal, Vol 951, Iss 2, p 90 (2023)
We present a spectroscopic analysis of a sample of 48 M-dwarf stars (0.2 M _⊙ < M < 0.6 M _⊙ ) from the Hyades open cluster using high-resolution H -band spectra from the Sloan Digital Sky Survey/Apache Point Observatory Galactic Evolution Experi
Externí odkaz:
https://doaj.org/article/3257bc78f80b4e9890b761fb84585458
Autor:
Keith Hawkins, Adrian M. Price-Whelan, Allyson A. Sheffield, Aidan Z. Subrahimovic, Rachael L. Beaton, Vasily Belokurov, Denis Erkal, Sergey E. Koposov, Richard R. Lane, Chervin F. P. Laporte, Christian Nitschelm
Publikováno v:
The Astrophysical Journal, Vol 948, Iss 2, p 123 (2023)
Stellar streams in the Galactic halo are useful probes of the assembly of galaxies like the Milky Way. Many tidal stellar streams that have been found in recent years are accompanied by a known progenitor globular cluster or dwarf galaxy. However, th
Externí odkaz:
https://doaj.org/article/fdfb04d66cc2469c94ac90d8a7477c3c
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
Autor:
Grecco A. Oyarzún, Kevin Bundy, Kyle B. Westfall, Ivan Lacerna, Renbin Yan, J. R. Brownstein, Niv Drory, Richard R. Lane
Publikováno v:
The Astrophysical Journal, Vol 947, Iss 1, p 13 (2023)
We combine an unprecedented MaNGA sample of over 3000 passive galaxies in the stellar mass range 10 ^9 –10 ^12 M _⊙ with the Sloan Digital Sky Survey group catalog by Tinker to quantify how central and satellite formation, quantified by radial pr
Externí odkaz:
https://doaj.org/article/9d700178d77c40ecba9d2174ea7c885f
Autor:
Danny Horta, Ricardo P Schiavon, J Ted Mackereth, David H Weinberg, Sten Hasselquist, Diane Feuillet, Robert W O’Connell, Borja Anguiano, Carlos Allende-Prieto, Rachael L Beaton, Dmitry Bizyaev, Katia Cunha, Doug Geisler, D A García-Hernández, Jon Holtzman, Henrik Jönsson, Richard R Lane, Steve R Majewski, Szabolcs Mészáros, Dante Minniti, Christian Nitschelm, Matthew Shetrone, Verne V Smith, Gail Zasowski
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 520:5671-5711
Galactic haloes in a $\Lambda$-CDM universe are predicted to host today a swarm of debris resulting from cannibalised dwarf galaxies. The chemo-dynamical information recorded in their stellar populations helps elucidate their nature, constraining the
Autor:
Shuang Zhou, Michael Merrifield, Alfonso Aragón-Salamanca, Joel R Brownstein, Niv Drory, Renbin Yan, Richard R Lane
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 517:3723-3731
Environment has long been known to have significant impact on the evolution of galaxies, but here we seek to quantify the subtler differences that might be found in disk galaxies, depending on whether they are isolated, the most massive galaxy in a g
Autor:
Michael J Greener, Alfonso Aragón-Salamanca, Michael Merrifield, Thomas Peterken, Elizaveta Sazonova, Roan Haggar, Dmitry Bizyaev, Joel R Brownstein, Richard R Lane, Kaike Pan
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 516:1275-1288
We investigate archaeologically how the metallicity in both stellar and gaseous components of spiral galaxies of differing masses evolve with time, using data from the SDSS-IV MaNGA survey. For the stellar component, we can measure this evolution dir