Chemical composition of evolved stars in the open cluster NGC2506

被引：28

作者：

Mikolaitis, Sarunas ^{[1
]}

Tautvaisiene, Grazina ^{[1
]}

Gratton, Raffaele ^{[2
]}

Bragaglia, Angela ^{[3
]}

Carretta, Eugenio ^{[3
]}

机构：

[1] Vilnius Univ, Inst Theoret Phys & Astron, LT-01108 Vilnius, Lithuania

[2] INAF Osservatorio Astron Padova, I-35122 Padua, Italy

[3] INAF Osservatorio Astron Bologna, I-40127 Bologna, Italy

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2011年 / 416卷 / 02期

关键词：

stars: abundances; stars: atmospheres; stars: horizontal branch; open clusters and associations: individual: NGC2506; OLD OPEN CLUSTERS; CORE HELIUM FLASH; IRON ABUNDANCES; PHOTOMETRY; EVOLUTION; NGC-2506; BARIUM; GIANTS; CARBON; 1ST;

D O I：

10.1111/j.1365-2966.2011.19106.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this study we present abundances of C-12, C-13, N, O and up to 26 other chemical elements in two first-ascent giants and two core-helium-burning 'clump' stars of the open cluster NGC2506. Abundances of carbon were derived using the C-2 Swan (0,1) band head at 5635.5 angstrom. The wavelength interval 7940-8130 angstrom, with strong CN features, was analysed in order to determine nitrogen abundances and carbon isotope ratios. The oxygen abundances were determined from the [OI] line at 6300 angstrom. NGC2506 was found to have a mean [Fe/H] = -0.24 +/- 0.05 (standard deviation). Compared with the Sun and other dwarf stars of the Galactic disc, mean abundances in the investigated clump stars suggest that carbon is depleted by about 0.2 dex, nitrogen is overabundant by about 0.3 dex and other chemical elements have abundance ratios close to solar. The C/N and C-12/C-13 ratios are lowered to 1.25 +/- 0.27 and 11 +/- 3, respectively.

引用

页码：1092 / 1098

页数：7

共 50 条

[11] Search for variable stars in two old open clusters: NGC 2506 and NGC 2420
Kim, SL
Chun, MY
Park, BG
Kim, SC
Lee, SH
Lee, MG
Ann, HB
Sung, H
Jeon, YB
Yuk, IS
ACTA ASTRONOMICA, 2001, 51 (01): : 49 - 63
[12] Be STARS IN THE OPEN CLUSTER NGC 6830
Yu, Po-Chieh
Lin, Chien-Cheng
Lin, Hsing-Wen
Lee, Chien-De
Konidaris, Nick
Ngeow, Chow-Choong
Ip, Wing-Huen
Chen, Wen-Ping
Chen, Hui-Chen
Malkan, Matthew A.
Chang, Chan-Kao
Laher, Russ
Huang, Li-Ching
Cheng, Yu-Chi
Edelson, Rick
Ritter, Andreas
Quimby, Robert
Ben-Ami, Sagi
Ofek, Eran. O.
Surace, Jason
Kulkarni, Shrinivas R.
ASTRONOMICAL JOURNAL, 2016, 151 (05):
[13] Discovery of Tidal Tails around the Old Open Cluster NGC 2506
Gao, Xinhua
ASTROPHYSICAL JOURNAL, 2020, 894 (01):
[14] Chemical analysis of giant stars in the young open cluster NGC 3114
Santrich, O. J. Katime
Pereira, C. B.
Drake, N. A.
ASTRONOMY & ASTROPHYSICS, 2013, 554
[15] CHEMICAL ABUNDANCES OF MEMBER STARS IN THE OPEN CLUSTER NGC 2632 (PRAESEPE)
Yang, X. L.
Chen, Y. Q.
Zhao, G.
ASTRONOMICAL JOURNAL, 2015, 150 (05):
[16] EVOLVED STARS IN THE CORE OF THE MASSIVE GLOBULAR CLUSTER NGC 2419
Sandquist, Eric L.
Hess, Jordan M.
ASTRONOMICAL JOURNAL, 2008, 136 (06): : 2259 - 2285
[17] Asteroseismic analysis of eight solar-like oscillating evolved stars in the open cluster NGC 6811
Orhan, Zeynep Celik
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2021, 506 (03) : 4413 - 4420
[18] Rotation and chemical abundances of Ap/Bp stars in the open cluster NGC 6475
Folsom, C. P.
Wade, G. A.
Bagnulo, S.
Landstreet, J. D.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2007, 376 (01) : 361 - 370
[19] Chemical Compositions Of Red Giant Stars in the Old Open Cluster NGC 7789
Nagarajan, Neel
Sneden, Christopher
Afsar, Melike
Pilachowski, Catherine A.
ASTRONOMICAL JOURNAL, 2023, 165 (06):
[20] VARIABLE STARS IN THE OPEN CLUSTER NGC 7142
Sandquist, Eric L.
Serio, Andrew W.
Shetrone, Matthew
ASTRONOMICAL JOURNAL, 2011, 142 (06):

← 1 2 3 4 5 →