Velocity and abundance precisions for future high‐resolution spectroscopic surveys: A study for 4MOST
Velocity and abundance precisions for future high‐resolution spectroscopic surveys: A study for 4MOST
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未来高分辨率光谱调查的速度和丰度精度:4MOST 的研究
DOI:
10.1002/asna.201211814
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发表时间:
2013
影响因子:
0.9
通讯作者:
Sbordone
中科院分区:
文献类型:
--
作者:
Caffau;Sbordone
In preparation for future, large‐scale, multi‐object, high‐resolution spectroscopic surveys of the Galaxy, we present a series of tests of the precision in radial velocity and chemical abundances that any such project can achieve at a 4 m class telescope. We briefly discuss a number of science cases that aim at studying the chemo‐dynamical history of the major Galactic components (bulge, thin and thick disks, and halo) – either as a follow‐up to the Gaia mission or on their own merits. Based on a large grid of synthetic spectra that cover the full range in stellar parameters of typical survey targets, we devise an optimal wavelength range and argue for a moderately high‐resolution spectrograph. As a result, the kinematic precision is not limited by any of these factors, but will practically only suffer from systematic effects, easily reaching uncertainties <1km s–1. Under realistic survey conditions (namely, considering stars brighter than r = 16 mag with reasonable exposure times) we prefer an ideal resolving power of R ∼20 000 on average, for an overall wavelength range (with a common two‐arm spectrograph design) of [395;456.5] nm and [587;673] nm. We show for the first time on a general basis that it is possible to measure chemical abundance ratios to better than 0.1 dex for many species (Fe, Mg, Si, Ca, Ti, Na, Al, V, Cr, Mn, Co, Ni, Y, Ba, Nd, Eu) and to an accuracy of about 0.2 dex for other species such as Zr, La, and Sr. While our feasibility study was explicitly carried out for the 4MOST facility, the results can be readily applied to and used for any other conceptual design study for high‐resolution spectrographs. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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DOI:
--
发表时间:
2012
期刊:
Other Conferences
影响因子:
--
作者:
P. Sartoretti;N. Leclerc;J. Walcher;E. Caffau;L. Sbordone;P. Laporte
通讯作者:
P. Laporte
DOI:
--
发表时间:
2009
期刊:
Publications Astronomical Society of Australia
影响因子:
--
作者:
M. Heil;A. Juseviciute;F. Käppeler;R. Gallino;R. Gallino;M. Pignatari;M. Pignatari;E. Uberseder
通讯作者:
E. Uberseder
DOI:
--
发表时间:
2002
期刊:
影响因子:
--
作者:
F. Matteucci
通讯作者:
F. Matteucci
DOI:
--
发表时间:
2012
期刊:
Proceedings of the International Astronomical Union
影响因子:
--
作者:
Michael Soffel
通讯作者:
Michael Soffel
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
A. Mucciarelli;M. Salaris;P. T. U. O. Bologna;Italy.;A. R. Institute;Liverpool John Moores University;UK.;G. D. Paris;Cnrs;U. Diderot;France.
通讯作者:
France.