Zobrazeno 1 - 10
of 1 262
pro vyhledávání: '"Majewski, A. R."'
Autor:
Gibson, Benjamin J., Zasowski, Gail, Seth, Anil, Gadotti, Dimitri A., Wang, Zixian, Bizyaev, Dmitry, Majewski, Steven R., Holtzmann, Jon, Sharma, Sanjib
We describe a novel framework to model galaxy spectra with two cospatial stellar populations, such as may represent a bulge & bar or thick & thin disc, and apply it to APOGEE spectra in the inner $\sim$2 kpc of M31, as well as to stacked spectra repr
Externí odkaz:
http://arxiv.org/abs/2410.23340
Autor:
Wanderley, Fabio, Cunha, Katia, Kochukhov, Oleg, Smith, Verne V., Souto, Diogo, Cao, Lyra, Covey, Kevin, Majewski, Steven R., Martinez, Cintia, Muirhead, Philip S., Pinsonneault, Marc, Prieto, C. Allende, Stassun, Keivan G.
Average magnetic field measurements are presented for 62 M-dwarf members of the Pleiades open cluster, derived from Zeeman-enhanced Fe I lines in the H-band. An MCMC methodology was employed to model magnetic filling factors using SDSS-IV APOGEE high
Externí odkaz:
http://arxiv.org/abs/2406.13757
Autor:
Sales-Silva, J. V., Cunha, K., Smith, V. V., Daflon, S., Souto, D., Guerço, R., Queiroz, A., Chiappini, C., Hayes, C. R., Masseron, T., Hasselquist, Sten, Horta, D., Prantzos, N., Zoccali, M., Prieto, C. Allende, Barbuy, B., Beaton, R., Bizyaev, D., Fernández-Trincado, J. G., Frinchaboy, P. M., Holtzman, J. A., Johnson, J. A., Jönsson, Henrik, Majewski, S. R., Minniti, D., Nidever, D. L., Schiavon, R. P., Schultheis, M., Sobeck, J., Stringfellow, G. S., Zasowski, G.
This study probes the chemical abundances of the neutron-capture elements cerium and neodymium in the inner Milky Way from an analysis of a sample of $\sim$2000 stars in the Galactic Bulge/bar spatially contained within $|X_{Gal}|<$5 kpc, $|Y_{Gal}|<
Externí odkaz:
http://arxiv.org/abs/2402.14898
Autor:
Povick, Joshua T., Nidever, David L., Massana, Pol, Majewski, Steven R., Yuxi, Lu, Cioni, Maria-Rosa L., Geisler, Doug, Mészáros, Szabolcs, Nitschelm, Christian, Almeida, Andrés, Lane, Richard R., Longa-Peña, Penélope
We determine radial- and age-abundance gradients of the Small Magellanic Cloud (SMC) using spectra of 2,062 red giant branch (RGB) field stars observed by SDSS-IV / APOGEE-2S. With coverage out to $\sim$9 kpc in the SMC, these data taken with the hig
Externí odkaz:
http://arxiv.org/abs/2310.14299
Autor:
Schiavon, Ricardo P., Phillips, Siân G., Myers, Natalie, Horta, Danny, Minniti, Dante, Prieto, Carlos Allende, Anguiano, Borja, Beaton, Rachael L., Beers, Timothy C., Brownstein, Joel R., Cohen, Roger E., Fernández-Trincado, José G., Frinchaboy, Peter M., Jönsson, Henrik, Kisku, Shobhit, Lane, Richard R., Majewski, Steven R., Mason, Andrew C., Mészáros, Szabolcs, Stringfellow, Guy S.
We introduce the SDSS/APOGEE Value Added Catalogue of Galactic Globular Cluster (GC) Stars. The catalogue is the result of a critical search of the APOGEE data release 17 (DR17) catalogue for candidate members of all known Galactic GCs. Candidate mem
Externí odkaz:
http://arxiv.org/abs/2310.07764
We revisit the classical $K_Z$ problem -- determination of the vertical force and implied total mass density distribution of the Milky Way disk -- for a wide range of Galactocentric radius and vertical height using chemically selected thin and thick
Externí odkaz:
http://arxiv.org/abs/2309.17405
Autor:
Povick, Joshua T., Nidever, David L., Majewski, Steven R., Geisler, Doug, Cioni, Maria-Rosa L., Yuxi, Lu, Muñoz, Ricardo, Stringfellow, Guy S., Almeida, Andrés, Longa-Peña, Penélope, Lane, Richard R., Roman-Lopes, Alexandre
We present the abundance gradients of the Large Magellanic Cloud (LMC) for 25 elemental abundance ratios and their respective temporal evolution as well as age-[X/Fe] trends using 6130 LMC field red giant branch (RGB) stars observed by SDSS-IV / APOG
Externí odkaz:
http://arxiv.org/abs/2309.12503
Autor:
Loaiza-Tacuri, V., Cunha, K., Souto, D., Smith, V. V., Guerço, R., Chiappini, C., Silva, J. V. Sales, Horta, D., Prieto, C. Allende, Beaton, R., Bizyaev, D., Daflon, S., Frinchaboy, P., Hasselquist, S., Hayes, C. R., Holtzman, J. A., Jönsson, H., Majewski, S. R., Mészáros, S., Nidever, D. L., Pinsonneault, M., Zasowski, G.
Previous results in the literature have found the young inner-disk open cluster NGC 6705 to be mildly $\alpha$-enhanced. We examined this possibility via an independent chemical abundance analysis for 11 red-giant members of NGC 6705. The analysis is
Externí odkaz:
http://arxiv.org/abs/2309.10778
Autor:
Almeida, Andres, Majewski, Steven R., Nidever, David L., Olsen, Knut A. G., Monachesi, Antonela, Kallivayalil, Nitya, Hasselquist, Sten, Choi, Yumi, Povick, Joshua T., Wilson, John C., Geisler, Doug, Lane, Richard R., Nitschelm, Christian, Sobeck, Jennifer S., Stringfellow, Guy S.
The Magellanic Cloud system represents a unique laboratory for study of both interacting dwarf galaxies and the ongoing process of the formation of the Milky Way and its halo. We focus on one aspect of this complex, 3 body interaction - the dynamical
Externí odkaz:
http://arxiv.org/abs/2308.13631
Autor:
Imig, Julie, Price, Cathryn, Holtzman, Jon A., Stone-Martinez, Alexander, Majewski, Steven R., Weinberg, David H., Johnson, Jennifer A., Prieto, Carlos Allende, Beaton, Rachael L., Beers, Timothy C., Bizyaev, Dmitry, Blanton, Michael R., Brownstein, Joel R., Cunha, Katia, Fernández-Trincado, José G., Feuillet, Diane K., Hasselquist, Sten, Hayes, Christian R., Jönsson, Henrik, Lane, Richard R., Lian, Jianhui, Mészáros, Szabolcs, Nidever, David L., Robin, Annie C., Shetrone, Matthew, Smith, Verne, Wilson, John C.
Publikováno v:
ApJ 954 124 (2023)
We present new maps of the Milky Way disk showing the distribution of metallicity ([Fe/H]), $\alpha$-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 Observ
Externí odkaz:
http://arxiv.org/abs/2307.13887