HD 11397 and HD 14282:: two new barium stars?

被引:6
|
作者
Pompeia, L. [1 ]
Allen, D. M. [2 ,3 ]
机构
[1] Univ Vale Paraiba, IP&D, BR-12244000 Sao Jose Dos Campos, SP, Brazil
[2] Univ Hertfordshire, STRI, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England
[3] Univ Hertfordshire, Sch Phys Astron & Math, Hatfield AL10 9AB, Herts, England
关键词
stars : abundances; stars : AGB and post-AGB; stars : chemically peculiar;
D O I
10.1051/0004-6361:200809707
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Context. We have performed a detailed abundance analysis of the content of s-process elements of two dwarf stars with suspected overabundace of those elements. Such stars belong to a special kinematic sample of the solar neighborhood, with peculiar kinematics and di. erent chemical abundances when compared to " normal" disk stars. Aims. We aim to define if those stars can be identified as barium stars, based on their s- process elements abundances, and their classification, i. e., if they share their chemical profile with strong or mild barium stars. We also intend to shed light on the possible origins of the di. erent kinds of barium stars. Methods. Spectra have been taken by using the FEROS spectrograph at the 1.52m telescope of ESO, La Silla. Abundances have been derived for 18 elements, by matching the synthetic profile with the observed spectrum. Results. We have found that HD 11397 shows a mild enhancement for most of the s- process elements as well as for some r- process elements. This star seems to share its abundance profile with the mild Ba- stars. Although showing some slight chemical anomalies for Y, Sr, Mo, and Pb, HD 14282 depicts a chemical pattern similar to the normal stars with slight s- process enhancements.
引用
收藏
页码:723 / U128
页数:9
相关论文
共 50 条
  • [41] uvby photometry of the mCP stars HD 35298, 19 Lyrae, HD 192678, and HR 8216
    Adelman, SJ
    Rice, RH
    ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1999, 136 (01): : 111 - 115
  • [42] Fundamental parameters and evolutionary status of the magnetic chemically peculiar stars HD 188041 (V1291 Aquilae), HD 111133 (EP Virginis), and HD 204411: spectroscopy versus interferometry
    Romanovskaya, A.
    Ryabchikova, T.
    Shulyak, D.
    Perraut, K.
    Valyavin, G.
    Burlakova, T.
    Galazutdinov, G.
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2019, 488 (02) : 2343 - 2356
  • [43] The chemical composition of the mild barium star HD 202109
    Yushchenko, AV
    Gopka, VF
    Kim, C
    Liang, YC
    Musaev, FA
    Galazutdinov, GA
    ASTRONOMY & ASTROPHYSICS, 2004, 413 (03): : 1105 - 1114
  • [44] Lithium on the surface of cool magnetic CP stars. II. Spectrum analysis of HD 83368 and HD 60435 with lithium spots
    Shavrina, AV
    Polosukhina, NS
    Zverko, J
    Mashonkina, LI
    Khalack, V
    Ziznovsky, J
    Hack, M
    Tsymbal, V
    North, P
    Vygonec, VV
    ASTRONOMY & ASTROPHYSICS, 2001, 372 (02): : 571 - 578
  • [45] The HARPS search for southern extra-solar planets XXI. Three new giant planets orbiting the metal-poor stars HD 5388, HD 181720, and HD 190984
    Santos, N. C.
    Mayor, M.
    Benz, W.
    Bouchy, F.
    Figueira, P.
    Lo Curto, G.
    Lovis, C.
    Melo, C.
    Moutou, C.
    Naef, D.
    Pepe, F.
    Queloz, D.
    Sousa, S. G.
    Udry, S.
    ASTRONOMY & ASTROPHYSICS, 2010, 512
  • [46] uvby photometry of the magnetic CP stars HD 36668, 36 Lyncis, HD 86592, and HR 8861
    Adelman, SJ
    ASTRONOMY & ASTROPHYSICS, 2000, 357 (02) : 548 - 552
  • [47] uvby photometry of the chemically peculiar stars HD 15980, HR 1094, 33 Gem, and HD 115708
    Adelman, SJ
    ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1999, 134 (01): : 53 - 57
  • [48] Magnetic field of CP stars in the Ori OB1 association. II. HD36540, HD36668, HD36916, HD37058
    Romanyuk, I. I.
    Semenko, E. A.
    Yakunin, I. A.
    Kudryavtsev, D. O.
    Moiseeva, A. V.
    ASTROPHYSICAL BULLETIN, 2017, 72 (02) : 165 - 177
  • [49] Model atmospheres of magnetic CP stars: HD 137509
    Shulyak, D.
    Kochukhov, O.
    Khan, S.
    CONTRIBUTIONS OF THE ASTRONOMICAL OBSERVATORY SKALNATE PLESO, 2008, 38 (02): : 449 - 450
  • [50] Elemental abundance studies of CP stars III.: The magnetic CP stars α Scl and HD 170973
    López-García, Z
    Adelman, SJ
    Pintado, OI
    ASTRONOMY & ASTROPHYSICS, 2001, 367 (03) : 859 - 864