Zobrazeno 1 - 10
of 427
pro vyhledávání: '"Holtzman, J A"'
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:
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:
Wilson, J. C., Hearty, F. R., Skrutskie, M. F., Majewski, S. R., Holtzman, J. A., Eisenstein, D., Gunn, J., Blank, B., Henderson, C., Smee, S., Nelson, M., Nidever, D., Arns, J., Barkhouser, R., Barr, J., Beland, S., Bershady, M. A., Blanton, M. R., Brunner, S., Burton, A., Carey, L., Carr, M., Colque, J. P., Crane, J., Damke, G. J., Davidson Jr., J. W., Dean, J., Di Mille, F., Don, K. W., Ebelke, G., Evans, M., Fitzgerald, G., Gillespie, B., Hall, M., Harding, A., Harding, P., Hammond, R., Hancock, D., Harrison, C., Hope, S., Horne, T., Karakla, J., Lam, C., Leger, F., MacDonald, N., Maseman, P., Matsunari, J., Melton, S., Mitcheltree, T., O'Brien, T., O'Connell, R. W., Patten, A., Richardson, W., Rieke, G., Rieke, M., Roman-Lopes, A., Schiavon, R. P., Sobeck, J. S., Stolberg, T., Stoll, R., Tembe, M., Trujillo, J. D., Uomoto, A., Vernieri, M., Walker, E., Weinberg, D. H., Young, E., Anthony-Brumfield, B., Bizyaev, D., Breslauer, B., De Lee, N., Downey, J., Halverson, S., Huehnerhoff, J., Klaene, M., Leon, E., Long, D., Mahadevan, S., Malanushenko, E., Nguyen, D. C., Owen, R., Sanchez-Gallego, J. R., Sayres, C., Shane, N., Shectman, S. A., Shetrone, M., Skinner, D., Stauffer, F., Zhao, B.
We describe the design and performance of the near-infrared (1.51--1.70 micron), fiber-fed, multi-object (300 fibers), high resolution (R = lambda/delta lambda ~ 22,500) spectrograph built for the Apache Point Observatory Galactic Evolution Experimen
Externí odkaz:
http://arxiv.org/abs/1902.00928
Autor:
Zasowski, G., Schultheis, M., Hasselquist, S., Cunha, K., Sobeck, J., Johnson, J. A., Rojas-Arriagada, A., Majewski, S. R., Andrews, B. H., Jonsson, H., Beers, T. C., Chojnowski, S. D., Frinchaboy, P. M., Holtzman, J. A., Minniti, D., Nidever, D. L., Nitschelm, C.
We present an overview of the distributions of 11 elemental abundances in the Milky Way's inner regions, as traced by APOGEE stars released as part of SDSS Data Release 14/15 (DR14/DR15), including O, Mg, Si, Ca, Cr, Mn, Co, Ni, Na, Al, and K. This s
Externí odkaz:
http://arxiv.org/abs/1811.01097
Autor:
Zasowski, G., Cohen, R. E., Chojnowski, S. D., Santana, F., Oelkers, R. J., Andrews, B., Beaton, R. L., Bender, C., Bird, J. C., Bovy, J., Carlberg, J. K., Covey, K., Cunha, K., Dell'Agli, F., Fleming, S. W., Frinchaboy, P. M., Garcia-Hernandez, D. A., Harding, P., Holtzman, J., Johnson, J. A., Kollmeier, J. A., Majewski, S. R., Meszaros, Sz., Munn, J., Munoz, R. R., Ness, M. K., Nidever, D. L., Poleski, R., Zuniga, C. Roman, Shetrone, M., Simon, J. D., Smith, V. V., Sobeck, J. S., Stringfellow, G. S., Szigetiaros, L., Tayar, J., Troup, N.
APOGEE-2 is a high-resolution, near-infrared spectroscopic survey observing roughly 300,000 stars across the entire sky. It is the successor to APOGEE and is part of the Sloan Digital Sky Survey IV (SDSS-IV). APOGEE-2 is expanding upon APOGEE's goals
Externí odkaz:
http://arxiv.org/abs/1708.00155
Autor:
Schultheis, M., Rojas-Arriagada, A., Pérez, A. E. García, Jönsson, H., Hayden, M., Nandakumar, G., Cunha, K., Prieto, C. Allende, Holtzman, J. A., Beers, T. C., Bizyaev, D., Brinkmann, J., Carrera, R., Cohen, R. E., Geisler, D., Hearty, F. R., Fernández-Trincado, J. G., Maraston, C., Minniti, D., Nitschelm, C., Roman-Lopes, A., Schneider, D. P., Tang, B., Villanova, S., Zasowski, G., Majewski, S. R.
Publikováno v:
A&A 600, A14 (2017)
Baade's window (BW) is one of the most observed Galactic bulge fields in terms of chemical abundances. Due to its low and homogeneous interstellar absorption it is considered as a calibration field for Galactic bulge studies. In the era of large spec
Externí odkaz:
http://arxiv.org/abs/1702.01547
Autor:
Ness, M., Rix, H-W., Hogg, David W., Casey, A. R., Holtzman, J., Fouesneau, M., Zasowski, G., Geisler, D., Shetrone, M., Minniti, D., Frinchaboy, Peter M., Roman-Lopes, Alexandre
We explore to which extent stars within Galactic disk open clusters resemble each other in the high-dimensional space of their photospheric element abundances, and contrast this with pairs of field stars. Our analysis is based on abundances for 20 el
Externí odkaz:
http://arxiv.org/abs/1701.07829
Autor:
Anders, F., Chiappini, C., Minchev, I., Miglio, A., Montalbán, J., Mosser, B., Rodrigues, T. S., Santiago, B. X., Baudin, F., Beers, T. C., da Costa, L. N., García, R. A., García-Hernández, D. A., Holtzman, J., Maia, M. A. G., Majewski, S., Mathur, S., Noels-Grotsch, A., Pan, K., Schneider, D. P., Schultheis, M., Steinmetz, M., Valentini, M., Zamora, O.
Publikováno v:
A&A 600, A70 (2017)
Using combined asteroseismic and spectroscopic observations of 418 red-giant stars close to the Galactic disc plane (6 kpc $
Externí odkaz:
http://arxiv.org/abs/1608.04951
Galactic Archaeology with asteroseismology and spectroscopy: Red giants observed by CoRoT and APOGEE
Autor:
Anders, F., Chiappini, C., Rodrigues, T. S., Miglio, A., Montalbán, J., Mosser, B., Girardi, L., Valentini, M., Noels, A., Morel, T., Johnson, J. A., Schultheis, M., Baudin, F., Peralta, R. de Assis, Hekker, S., Themeßl, N., Kallinger, T., García, R. A., Mathur, S., Baglin, A., Santiago, B. X., Martig, M., Minchev, I., Steinmetz, M., da Costa, L. N., Maia, M. A. G., Prieto, C. Allende, Cunha, K., Beers, T. C., Epstein, C., Pérez, A. E. García, García-Hernández, D. A., Harding, P., Holtzman, J., Majewski, S. R., Mészáros, Sz., Nidever, D., Pan, K., Pinsonneault, M., Schiavon, R. P., Schneider, D. P., Shetrone, M. D., Stassun, K., Zamora, O., Zasowski, G.
Publikováno v:
A&A 597, A30 (2017)
With the advent of the space missions CoRoT and Kepler, it has become feasible to determine precise asteroseismic masses and ages for large samples of red-giant stars. In this paper, we present the CoRoGEE dataset -- obtained from CoRoT lightcurves f
Externí odkaz:
http://arxiv.org/abs/1604.07763
Autor:
de Lis, S. Bertran, Prieto, C. Allende, Majewski, S. R., Schiavon, R. P., Holtzman, J. A., Shetrone, M., Carrera, R., Pérez, A. E. García, Mészáros, Sz., Frinchaboy, P. M., Hearty, F. R., Nidever, D. L., Zasowski, G., Ge, J.
Publikováno v:
A&A 590, A74 (2016)
We examine the distribution of the [O/Fe] abundance ratio in stars across the Galactic disk using H-band spectra from the Apache Point Galactic Evolution Experiment (APOGEE). We minimize systematic errors by considering groups of stars with similar a
Externí odkaz:
http://arxiv.org/abs/1603.05491