Hostname: page-component-848d4c4894-2xdlg Total loading time: 0 Render date: 2024-06-17T06:34:58.932Z Has data issue: false hasContentIssue false
  • English
  • Français

Lithium abundance evolution in open clusters: Hyades, NGC 752, and M 67

Published online by Cambridge University Press:  19 December 2013

M. Castro ,
G. Pace  and
J.-D. do Nascimento Jr.
M. Castro
Affiliation:
Departamento de Física Teórica e Experimental (DFTE), Universidade Federal do Rio Grande do Norte (UFRN), Natal (RN), Brazil
G. Pace
Affiliation:
Centro de Astrofísica da Universidade do Porto (CAUP), Porto, Portugal
J.-D. do Nascimento Jr.
Affiliation:
Departamento de Física Teórica e Experimental (DFTE), Universidade Federal do Rio Grande do Norte (UFRN), Natal (RN), Brazil
Get access

Abstract

Mixing mechanisms bring the Li from the base of the convective zone to deeper and warmer layers where it is destroyed. These mechanisms are investigated by comparing observations of Li abundances in stellar atmospheres to models of stellar evolution. Observations in open cluster are especially suitable for this comparison, since their age and metallicity are homogeneous among their members and better determined than in field stars. In this work, we compare the evolution of Li abundances in three different clusters: the Hyades, NGC 752, and M 67. Our models are calculated with microscopic diffusion and transport of chemicals by meridional circulation, and calibrated on the Sun. These comparisons allow us to follow the evolution of Li abundance as a function of stellar mass in each cluster and as a function of the age by comparing this evolution in each cluster. We evaluate the efficiency of the mixing mechanisms used in the models, and we try to identifiy the lacking mechanisms to reproduce the observed evolution of Li abundance.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 63: New Advances in Stellar Physics: From Microscopic to Macroscopic Processes , 2013 , pp. 61 - 66
Copyright
© EAS, EDP Sciences, 2013

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Asplund, M., Grevesse, N., Sauval, A.J., & Scott, P., 2009, A&AR, 47, 481
Balachandran, S., 1995, ApJ, 446, 203CrossRef
Baumann, P., Ramírez, I., Meléndez, J., Asplund, M., & Lind, K., 2010, A&A, 519, A87
Canto Martins, B.L., Lèbre, A., Palacios, A., et al., 2011, A&A, 527, A94
Carrera, R., & Pancino, E., 2011, A&A, 535, A30
Castro, M., do Nascimento, J.-D. Jr., Biazzo, K., Meléndez, J., & De Medeiros, J.R., 2011, A&A, 526, A17
Charbonnel, C., & Talon, S., 2005, Science, 309, 2189CrossRef
Daniel, S.A., Latham, D.W., Mathieu, R.D., & Twarog, B.A., 1994, PASP, 106, 281CrossRef
de Bruijne, J.H.J., Hoogerwerf, R., & de Zeeuw, P.T., 2001, A&A, 367, 111
do Nascimento, J.-D. Jr., Castro, M., Meléndez, J., et al., 2009, A&A, 501, 687
do Nascimento, J.-D. Jr., Takeda, Y., Meléndez, J., et al., 2013, ApJ, 771, L31CrossRef
Hobbs, L.M., & Pilachowski, C., 1986, ApJ, 309, L17CrossRef
Jones, B.F., Fischer, D., & Soderblom, D.R., 1999, AJ, 117, 330CrossRef
Montalbán, J., & Schatzman, E., 2000, A&A, 354, 943
Meléndez, J., & Ramírez, I., 2007, ApJ, 669, L89CrossRef
Meléndez, J., Ramírez, I., Casagrande, L., et al., 2010, Ap&SS, 328, 193
Meléndez, J., Bergemann, M., Cohen, J.G., et al., 2012, A&A, 543, A29
Pace, G., Castro, M., Meléndez, J., Théado, S., & do Nascimento, J.-D. Jr., 2012, A&A, 541, A150
Pasquini, L., Randich, S., & Pallavicini, R., 1997, A&A, 325, 535
Pasquini, L., Biazzo, K., Bonifacio, P., Randich, S., & Bedin, L.R., 2008, A&A, 489, 677
Pasquini, L., Melo, C., Chavero, C., Dravins, D., et al., 2011, A&A, 526, A127
Paulson, D.B., Sneden, C., Cochran, W.D., 2003, AJ, 125, 3185CrossRef
Pilachowski, C.A., & Hobbs, L.M., 1988, PASP, 100, 336CrossRef
Pilachowski, C., Saha, A., & Hobbs, L.M., 1988, PASP, 100, 474CrossRef
Randich, S., Primas, F., Pasquini, L., & Pallavicini, R., 2002, A&A, 387, 222
Randich, S., Primas, F., Pasquini, L., Sestito, P., & Pallavicini, R., 2007, A&A, 469, 163
Richard, O., Théado, S., & Vauclair, S., 2004, SoPh, 220, 243
Sestito, P., Randich, S., & Pallavicini, R., 2004, 426, 809
Takeda, Y., Honda, S., Ohnishi, T., et al., 2013, PASJ, 65, 53
Xiong, D.R., & Deng, L., 2009, MNRAS, 395, 2013CrossRef