2004A&A...420..625I

Query : 2004A&A...420..625I

2004A&A...420..625I - Astronomy and Astrophysics, volume 420625-629 (2004/6-3)

The bottleneck of CNO burning and the age of globular clusters.

IMBRIANI G., COSTANTINI H., FORMICOLA A., BEMMERER D., BONETTI R., BROGGINI C., CORVISIERO P., CRUZ J., FUELOEP Z., GERVINO G., GUGLIELMETTI A., GUSTAVINO C., GYUERKY G., JESUS A.P., JUNKER M., LEMUT A., MENEGAZZO R., PRATI P., ROCA V., ROLFS C., ROMANO M., ROSSI ALVAREZ C., SCHUEMANN F., SOMORJAI E., STRANIERO O., STRIEDER F., TERRASI F., TRAUTVETTER H.P., VOMIERO A. and ZAVATARELLI S.

Abstract (from CDS):

The transition between the Main Sequence and the Red Giant Branch in low mass stars is powered by the onset of CNO burning, whose bottleneck is 14N(p, γ)15O. The LUNA collaboration has recently improved the low energy measurements of the cross section of this key reaction. We analyse the impact of the revised reaction rate on the estimate of the Globular Cluster ages, as derived from the turnoff luminosity. We found that the age of the oldest Globular Clusters should be increased by about 0.7-1Gyr with respect to the current estimates.

Abstract Copyright: ∼

Journal keyword(s): stars: evolution - stars: population II - nuclear reactions, nucleosynthesis, abundances - Galaxy: globular clusters: general - Galaxy: formation - cosmology: distance scale

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 2095 0
2 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 2103 0

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