Setting new constraints on the age of the Universe

被引:24
作者
Ferreras, I [1 ]
Melchiorri, A [1 ]
Silk, J [1 ]
机构
[1] Univ Oxford, Nucl & Astrophys Lab, Oxford OX1 3RH, England
关键词
galaxies : elliptical and lenticular; cD; galaxies : evolution; cosmic microwave background; cosmology : miscellaneous;
D O I
10.1046/j.1365-8711.2001.04979.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
There are three independent techniques for determining the age of the Universe: via cosmochronology of long-lived radioactive nuclei, via stellar modelling and population synthesis of the oldest stellar populations, and, most recently, via the precision cosmology that has become feasible with the mapping of the acoustic peaks in the cosmic microwave background. We demonstrate that all three methods give completely consistent results, and enable us to set rigorous bounds on the maximum and minimum ages that are allowed for the Universe. We present new constraints on the age of the Universe by performing a multiband colour analysis of bright cluster ellipticals over a large redshift range (0.3<z<0.9), which allows us to infer the ages of their stellar populations over a wide range of possible formation redshifts and metallicities. Applying a prior to Hubble's constant of H-0 = 72 +/-8 km s(-1) Mpc(-1) we find the age of the Universe to be 13.0(-2.0)(+3.0) Gyr (1 sigma), in agreement with the estimates from Type Ia supernovae, as well as with the latest uranium decay estimates, which yield an age for the Milky Way of 12.5 +/-3 Gyr. If we combine the results from cluster ellipticals with the analysis of the angular power spectrum of the cosmic microwave background and with the observations of Type Ia supernovae at high redshift, we find a similar age: 13.2(-0.8)(+1.2) Gyr. Without the assumption of any priors, universes older than 18 Gyr are ruled out by the data at the 90 per cent confidence level.
引用
收藏
页码:L47 / L51
页数:5
相关论文
共 37 条
[1]   The K-band Hubble diagram for the brightest cluster galaxies: a test of hierarchical galaxy formation models [J].
Aragon-Salamanca, A ;
Baugh, CM ;
Kauffmann, G .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1998, 297 (02) :427-434
[2]   PRECISION PHOTOMETRY OF EARLY-TYPE GALAXIES IN THE COMA AND VIRGO CLUSTERS - A TEST OF THE UNIVERSALITY OF THE COLOR MAGNITUDE RELATION .2. ANALYSIS [J].
BOWER, RG ;
LUCEY, JR ;
ELLIS, RS .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1992, 254 (04) :601-613
[3]  
Bruzual A.G., 1993, APJ, V405, P538, DOI [10.1086/172385, DOI 10.1086/172385]
[4]   Sharpening the predictions of big-bang nucleosynthesis [J].
Burles, S ;
Nollett, KM ;
Truran, JW ;
Turner, MS .
PHYSICAL REVIEW LETTERS, 1999, 82 (21) :4176-4179
[5]   Distances, ages, and epoch of formation of globular clusters [J].
Carretta, E ;
Gratton, RG ;
Clementini, G ;
Pecci, FF .
ASTROPHYSICAL JOURNAL, 2000, 533 (01) :215-235
[6]   Measurement of stellar age from uranium decay [J].
Cayrel, R ;
Hill, V ;
Beers, TC ;
Barbuy, B ;
Spite, M ;
Spite, F ;
Plez, B ;
Andersen, J ;
Bonifacio, P ;
François, P ;
Molaro, P ;
Nordström, B ;
Primas, F .
NATURE, 2001, 409 (6821) :691-692
[7]   A flat Universe from high-resolution maps of the cosmic microwave background radiation [J].
de Bernardis, P ;
Ade, PAR ;
Bock, JJ ;
Bond, JR ;
Borrill, J ;
Boscaleri, A ;
Coble, K ;
Crill, BP ;
De Gasperis, G ;
Farese, PC ;
Ferreira, PG ;
Ganga, K ;
Giacometti, M ;
Hivon, E ;
Hristov, VV ;
Iacoangeli, A ;
Jaffe, AH ;
Lange, AE ;
Martinis, L ;
Masi, S ;
Mason, PV ;
Mauskopf, PD ;
Melchiorri, A ;
Miglio, L ;
Montroy, T ;
Netterfield, CB ;
Pascale, E ;
Piacentini, F ;
Pogosyan, D ;
Prunet, S ;
Rao, S ;
Romeo, G ;
Ruhl, JE ;
Scaramuzzi, F ;
Sforna, D ;
Vittorio, N .
NATURE, 2000, 404 (6781) :955-959
[8]  
DEBERNARDIS P, 2001, ASTROPH0105296
[9]   Cosmic confusion: degeneracies among cosmological parameters derived from measurements of microwave background anisotropies [J].
Efstathiou, G ;
Bond, JR .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1999, 304 (01) :75-97
[10]   How young are early-type cluster galaxies?: Quantifying the young stellar component in a rich cluster at z=0.41 [J].
Ferreras, I ;
Silk, J .
ASTROPHYSICAL JOURNAL, 2000, 541 (02) :L37-L40