He-rich and He-poor populations in RGB stars. Results on a sample of 19 globular clusters

Angela Bragaglia; Valentina D'Orazi; Raffaele G. Gratton; Eugenio Carretta; Santi Cassisi; Sara Lucatello

doi:10.1017/S1743921310004023

He-rich and He-poor populations in RGB stars. Results on a sample of 19 globular clusters

Angela Bragaglia^*, Valentina D'Orazi, Raffaele G. Gratton, Eugenio Carretta, Santi Cassisi, Sara Lucatello

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution

Abstract

We use about 1400 led giant branch stars observed in 19 Galactic Globular Clusters (GCs) to compare colours, metallicities, and RGB bump luininosities of stars assigned to first and second generations We find subtle differences which we attribute to the different Ho content In gem:tat these differences are visible only when we consider the extreme second generation stars. with the exception of NGC 2808 When using various indicators, the implied helium enhancements am similar, but the absolute calibration is still uncertain

Original language	English
Title of host publication	Light elements in the universe
Editors	C Charbonnel, M Tosi, F Primas, C Chiappini
Place of Publication	Cambridge
Publisher	Cambridge University Press (CUP)
Pages	169-170
Number of pages	2
Volume	5
Edition	S268
ISBN (Print)	978-0-521-76506-0
DOIs	https://doi.org/10.1017/S1743921310004023
Publication status	Published - 2010
Externally published	Yes
Event	268th Symposium of the International-Astronomical-Union - Geneva, Switzerland Duration: 9 Nov 2009 → 13 Nov 2009

Publication series

Name	IAU Symposium Proceedings Series
Publisher	CAMBRIDGE UNIV PRESS
Volume	5
ISSN (Print)	1743-9213

Conference

Conference	268th Symposium of the International-Astronomical-Union
Country/Territory	Switzerland
City	Geneva
Period	9/11/09 → 13/11/09

Keywords

Stars abundances
Population II - Galaxy globular clusters
STELLAR EVOLUTION DATABASE
ISOCHRONES
MODELS

Access to Document

10.1017/S1743921310004023

Cite this

Bragaglia, A., D'Orazi, V., Gratton, R. G., Carretta, E., Cassisi, S., & Lucatello, S. (2010). He-rich and He-poor populations in RGB stars. Results on a sample of 19 globular clusters. In C. Charbonnel, M. Tosi, F. Primas, & C. Chiappini (Eds.), Light elements in the universe (S268 ed., Vol. 5, pp. 169-170). (IAU Symposium Proceedings Series; Vol. 5). Cambridge University Press (CUP). https://doi.org/10.1017/S1743921310004023

@inproceedings{b771b79448c24367bb90e2fad8c9c585,

title = "He-rich and He-poor populations in RGB stars. Results on a sample of 19 globular clusters",

abstract = "We use about 1400 led giant branch stars observed in 19 Galactic Globular Clusters (GCs) to compare colours, metallicities, and RGB bump luininosities of stars assigned to first and second generations We find subtle differences which we attribute to the different Ho content In gem:tat these differences are visible only when we consider the extreme second generation stars. with the exception of NGC 2808 When using various indicators, the implied helium enhancements am similar, but the absolute calibration is still uncertain",

keywords = "Stars abundances, Population II - Galaxy globular clusters, STELLAR EVOLUTION DATABASE, ISOCHRONES, MODELS",

author = "Angela Bragaglia and Valentina D'Orazi and Gratton, {Raffaele G.} and Eugenio Carretta and Santi Cassisi and Sara Lucatello",

year = "2010",

doi = "10.1017/S1743921310004023",

language = "English",

isbn = "978-0-521-76506-0",

volume = "5",

series = "IAU Symposium Proceedings Series",

publisher = "Cambridge University Press (CUP)",

pages = "169--170",

editor = "C Charbonnel and M Tosi and F Primas and C Chiappini",

booktitle = "Light elements in the universe",

address = "United Kingdom",

edition = "S268",

note = "268th Symposium of the International-Astronomical-Union ; Conference date: 09-11-2009 Through 13-11-2009",

}

Bragaglia, A, D'Orazi, V, Gratton, RG, Carretta, E, Cassisi, S & Lucatello, S 2010, He-rich and He-poor populations in RGB stars. Results on a sample of 19 globular clusters. in C Charbonnel, M Tosi, F Primas & C Chiappini (eds), Light elements in the universe. S268 edn, vol. 5, IAU Symposium Proceedings Series, vol. 5, Cambridge University Press (CUP), Cambridge, pp. 169-170, 268th Symposium of the International-Astronomical-Union, Geneva, Switzerland, 9/11/09. https://doi.org/10.1017/S1743921310004023

He-rich and He-poor populations in RGB stars. Results on a sample of 19 globular clusters. / Bragaglia, Angela; D'Orazi, Valentina; Gratton, Raffaele G. et al.
Light elements in the universe. ed. / C Charbonnel; M Tosi; F Primas; C Chiappini. Vol. 5 S268. ed. Cambridge: Cambridge University Press (CUP), 2010. p. 169-170 (IAU Symposium Proceedings Series; Vol. 5).

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution

TY - GEN

T1 - He-rich and He-poor populations in RGB stars. Results on a sample of 19 globular clusters

AU - Bragaglia, Angela

AU - D'Orazi, Valentina

AU - Gratton, Raffaele G.

AU - Carretta, Eugenio

AU - Cassisi, Santi

AU - Lucatello, Sara

PY - 2010

Y1 - 2010

N2 - We use about 1400 led giant branch stars observed in 19 Galactic Globular Clusters (GCs) to compare colours, metallicities, and RGB bump luininosities of stars assigned to first and second generations We find subtle differences which we attribute to the different Ho content In gem:tat these differences are visible only when we consider the extreme second generation stars. with the exception of NGC 2808 When using various indicators, the implied helium enhancements am similar, but the absolute calibration is still uncertain

AB - We use about 1400 led giant branch stars observed in 19 Galactic Globular Clusters (GCs) to compare colours, metallicities, and RGB bump luininosities of stars assigned to first and second generations We find subtle differences which we attribute to the different Ho content In gem:tat these differences are visible only when we consider the extreme second generation stars. with the exception of NGC 2808 When using various indicators, the implied helium enhancements am similar, but the absolute calibration is still uncertain

KW - Stars abundances

KW - Population II - Galaxy globular clusters

KW - STELLAR EVOLUTION DATABASE

KW - ISOCHRONES

KW - MODELS

U2 - 10.1017/S1743921310004023

DO - 10.1017/S1743921310004023

M3 - Conference proceeding contribution

SN - 978-0-521-76506-0

VL - 5

T3 - IAU Symposium Proceedings Series

SP - 169

EP - 170

BT - Light elements in the universe

A2 - Charbonnel, C

A2 - Tosi, M

A2 - Primas, F

A2 - Chiappini, C

PB - Cambridge University Press (CUP)

CY - Cambridge

T2 - 268th Symposium of the International-Astronomical-Union

Y2 - 9 November 2009 through 13 November 2009

ER -

Bragaglia A, D'Orazi V, Gratton RG, Carretta E, Cassisi S, Lucatello S. He-rich and He-poor populations in RGB stars. Results on a sample of 19 globular clusters. In Charbonnel C, Tosi M, Primas F, Chiappini C, editors, Light elements in the universe. S268 ed. Vol. 5. Cambridge: Cambridge University Press (CUP). 2010. p. 169-170. (IAU Symposium Proceedings Series). doi: 10.1017/S1743921310004023

He-rich and He-poor populations in RGB stars. Results on a sample of 19 globular clusters

Abstract

Publication series

Conference

Keywords

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Cite this