Refined Chemical Abundances of ï° DRA and HR 7545 with ATLAS12
Doğuş Özuyar
Department of Astronomy and Space Sciences, Ankara University, Science Faculty Ankara, Turkey
Aslı Elmaslı
Department of Astronomy and Space Sciences, Ankara University, Science Faculty Ankara, Turkey
Şeyma Çalışkan
Department of Astronomy and Space Sciences, Ankara University, Science Faculty Ankara, Turkey
79-84
Vol: 7, Issue: 3, 2017
Receiving Date:
2017-05-18
Acceptance Date:
2017-07-10
Publication Date:
2017-08-04
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Abstract
We present the more refined abundances of elements (C, O, Na, Mg, Al, Si, Ca, Sc, Ti, V, Cr, Mn, Fe, Ni, Zn, Sr, Y, Zr and Ba) determined using the computationally intensive ATLAS12 atmosphere model for the metallic-line stars ï° Dra and HR 7545. We compare the chemical abundances derived from ATLAS9 model atmosphere with those of derived from ATLAS12. The abundances are in agreement with each other, within their uncertainties. We thus state that ATLAS9 may be used for the abundance analysis of slowly rotating chemically peculiar stars, such as ï° Dra and HR 7545
Keywords:
metallic-line stars; ï° Dra; HR 7545; chemical abundance; ATLAS9; ATLAS12
References
- L. Fossati, T. Ryabchikova, S. Bagnulo, E. Alecian, J. Grunhut, O. Kochukhov, and G. Wade, “The chemical abundance analysis of normal early A- and late B-type starsâ€, Astronomy and Astrophysics, 2009, 503, 945.
- H. A. Abt and N. I. Morrell, “The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Starsâ€, Astrophysical Journal Supplement, 1995, 99, 135
- R. O. Gray and R. F. Garrison, “The early A type stars - Refined MK classification, confrontation with Stroemgren photometry, and the effects of rotationâ€, Astrophysical Journal Supplement, 1987, 65,581.
- M. Okyudo and K. Sadakane, “Spectroscopic analyses of two A-type stars - ï° Draconis and 68 Tauriâ€, Astronomical Society of Japan, 1990, 42, 317.
- S. J. Adelman, “Elemental abundance analyses with DAO spectrograms - XV. The superficially normal late B-type and early A-type stars Merak, pi Draconis and kappa Cepheiâ€, Monthly Notices of the Royal Astronomical Society, 1996, 280, 130.
- S. J. Adelman, K. Yu, and A. F. Gulliver, “Elemental abundance analyses with DAO spectrograms: XXXIII. β UMa (A0mA1 IV-V), α Dra (A0 III), Ï€ Dra (A2 IIIs), and κ Cep (B9 III)â€, Astronomische Nachrichten, 2011, 332, 153.
- A. Elmaslı and Y. Nasolo, “Chemical abundance analysis of Ï€ Dra and HR 7545â€, AIP Conference Proceedings, 2016, 1815, 1, id.080012.
- A. Cowley, C. Cowley, M. Jaschek, and C. Jaschek, “A study of the bright A stars. I. A catalogue of spectral classificationsâ€, The Astronomical Journal, 1969, 74, 375
- Y. Wu, H. Singh, P. Prugniel, and M. Koleva, “Coude-feed stellar spectral library - atmospheric parametersâ€, Astronomy and Astrophysics, 2011, 525A, 71
- I. McDonald and M. Boyer, “Fundamental parameters and infrared excesses of Hipparcos starsâ€, Monthly Notices of the Royal Astronomical Society , 2012, 427, 343.
- F. Royer, S. Grenier, M. O. Baylac, A. E. Gomez, and J. Zorec, “Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin iâ€, Astronomy and Astrophysics, 2002, 393, 897
- G. Gontcharov, “Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common systemâ€, Astronomy Letters, 2006, 32, 759.
- F. Castelli, “Atlas12: How to use itâ€, Memorie della Società Astronomica Italiana Supplement, 2005, 8, 25 .
- R. L. Kurucz, “ATLAS12, SYNTHE, ATLAS9, WIDTH9, et ceteraâ€, Memorie della Società Astronomica Italiana Supplement, 2005, 8, 14.
- N. Grevesse, A. J. Sauval, “Standard Solar Compositionâ€, Space Science Reviews, 1998, 85, 161.
- G. Catanzaro and L. A. Balona, “Abundances in HD 27411 and the helium problem in Am starsâ€, Monthly Notices of the Royal Astronomical Society, 2012, 421, 1222.
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