High-redshift galaxies and low-mass stars
High-redshift galaxies and low-mass stars
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高红移星系和低质量恒星
DOI:
10.1093/mnras/stu029
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发表时间:
2014
影响因子:
4.8
通讯作者:
Wilkins S
中科院分区:
文献类型:
--
作者:
Wilkins S
The sensitivity available to near-infrared surveys has recently allowed us to probe the galaxy population atz≈ 7 and beyond. The existingHubbleWide Field Camera 3 (WFC3) and Visible and Infrared Survey Telescope for Astronomy (VISTA) Infrared Camera (VIRCam) instruments allow deep surveys to be undertaken well beyond 1 μm – a capability that will be further extended with the launch and commissioning of theJames Webb Space Telescope(JWST). As new regions of parameter space in both colour and depth are probed, new challenges for distant galaxy surveys are identified. In this paper, we present an analysis of the colours of L- and T-dwarf stars in widely used photometric systems. We also consider the implications of the newly identified Y-dwarf population – stars that are still cooler and less massive than T-dwarfs for both the photometric selection and spectroscopic follow-up of faint and distant galaxies. We highlight the dangers of working in the low-signal-to-noise regime, and the potential contamination of existing and future samples. We find thatHubble/WFC3 and VISTA/VIRCamY-drop selections targeting galaxies atz∼ 7.5 are vulnerable to contamination from T- and Y-class stars. Future observations usingJWST, targeting thez∼ 7 galaxy population, are also likely to prove difficult without deep medium-band observations. We demonstrate that single emission line detections in typical low-signal-to-noise spectroscopic observations may also be suspect, due to the unusual spectral characteristics of the cool dwarf star population.
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DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
R. Bouwens;G. Illingworth;V. González;I. Labbé;M. Franx;C. Conselice;J. Blakeslee;P. V. van Dokkum;B. Holden;D. Magee;D. Marchesini;Wei Zheng
通讯作者:
Wei Zheng
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
C. Morley;J. Fortney;M. Marley;C. Visscher;D. Saumon;S. Leggett
通讯作者:
S. Leggett
DOI:
10.1088/0067-0049/205/1/6
发表时间:
2013
期刊:
The Astrophysical Journal Supplement Series
影响因子:
--
作者:
G. Mace;J. Davy Kirkpatrick;M. Cushing;C. Gelino;R. Griffith;M. Skrutskie;K. Marsh;E. Wright;P. Eisenhardt;I. McLean;M. Thompson;Katholeen Mix;V. Bailey;C. Beichman;J. Bloom;A. Burgasser;J. Fortney;P. Hinz;R. Knox;P. Lowrance;M. Marley;C. Morley;T. Rodigas;D. Saumon;S. Sheppard;N. Stock
通讯作者:
N. Stock
DOI:
10.1088/0004-637x/744/2/83
发表时间:
2011-07
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Y. Ono;M. Ouchi;B. Mobasher;M. Dickinson;K. Penner;K. Shimasaku;B. Weiner;J. Kartaltepe;K. Nakajima;H. Nayyeri;D. Stern;N. Kashikawa;H. Spinrad
通讯作者:
Y. Ono;M. Ouchi;B. Mobasher;M. Dickinson;K. Penner;K. Shimasaku;B. Weiner;J. Kartaltepe;K. Nakajima;H. Nayyeri;D. Stern;N. Kashikawa;H. Spinrad
DOI:
10.1086/501431
发表时间:
2006-01
期刊:
The Astronomical Journal
影响因子:
--
作者:
K. Chiu;X. Fan;S. Leggett;D. Golimowski;W. Zheng;T. Geballe;D. Schneider;J. Brinkmann
通讯作者:
K. Chiu;X. Fan;S. Leggett;D. Golimowski;W. Zheng;T. Geballe;D. Schneider;J. Brinkmann