KIC 4768731: a bright long-period roAp star in the Kepler field

Smalley, B.; Niemczura, E.; Murphy, S. J.; Lehmann, H.; Kurtz, D. W.; Holdsworth, D. L.; Cunha, M. S.; Balona, L. A.; Briquet, Maryline; Bruntt, H.; De Cat, P.; Lampens, P.; Thygesen, A. O.; Uytterhoeven, K.

doi:10.1093/mnras/stv1515

Download

Article (Scientific journals)

KIC 4768731: a bright long-period roAp star in the Kepler field

Smalley, B.; Niemczura, E.; Murphy, S. J. et al.

2015 • In Monthly Notices of the Royal Astronomical Society, 452, p. 3334-3345

Peer Reviewed verified by ORBi

Permalink
https://hdl.handle.net/2268/186516

DOI
10.1093/mnras/stv1515

Files (1)Send to Details Statistics Bibliography Similar publications

Files

Full Text

Smalley2015.pdf

Author preprint (1.02 MB)

Download

All documents in ORBi are protected by a user license.

Send to

RIS BibTex APA Chicago Permalink X Linkedin

Details

Keywords :

asteroseismology; techniques: photometric; stars: abundances; stars: chemically peculiar; stars: individual: KIC 4768731; stars: oscillations

Abstract :

[en] We report the identification of 61.45 d[SUP]-1[/SUP] (711.2 μHz) oscillations, with amplitudes of 62.6 μmag, in KIC 4768731 (HD 225914) using Kepler photometry. This relatively bright (V = 9.17) chemically peculiar star with spectral type A5 Vp SrCr(Eu) has previously been found to exhibit rotational modulation with a period of 5.21 d. Fourier analysis reveals a simple dipole pulsator with an amplitude that has remained stable over a 4-yr time span, but with a frequency that is variable. Analysis of high-resolution spectra yields stellar parameters of T[SUB]eff[/SUB] = 8100 ± 200 K, log g = 4.0 ± 0.2, [Fe/H] = +0.31 ± 0.24 and v sin i = 14.8 ± 1.6 km s[SUP]-1[/SUP]. Line profile variations caused by rotation are also evident. Lines of Sr, Cr, Eu, Mg and Si are strongest when the star is brightest, while Y and Ba vary in antiphase with the other elements. The abundances of rare earth elements are only modestly enhanced compared to other roAp stars of similar T[SUB]eff[/SUB] and log g. Radial velocities in the literature suggest a significant change over the past 30 yr, but the radial velocities presented here show no significant change over a period of 4 yr.

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Smalley, B.; Astrophysics Group, Lennard-Jones Laboratories, Keele University, Staffordshire ST5 5BG, UK

Niemczura, E.; Instytut Astronomiczny, Uniwersytet Wrocławski, Kopernika 11, PL-51-622 Wrocław, Poland

Murphy, S. J.; Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, NSW 2006, Australia ; Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark

Lehmann, H.; Thüringer Landessternwarte Tautenburg (TLS), Sternwarte 5, D-07778 Tautenburg, Germany

Kurtz, D. W.; Jeremiah Horrocks Institute, University of Central Lancashire, Preston PR1 2HE, UK

Holdsworth, D. L.; Astrophysics Group, Lennard-Jones Laboratories, Keele University, Staffordshire ST5 5BG, UK

Cunha, M. S.; Instituto de Astrofisica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, P-4150-762 Porto, Portugal

Balona, L. A.; South African Astronomical Observatory, PO Box 9, Observatory 7935, Cape Town, South Africa

Briquet, Maryline ; Université de Liège - ULiège

Bruntt, H.; Stellar Astrophysics Center, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark

More authors (4 more)

Language :

English

Title :

KIC 4768731: a bright long-period roAp star in the Kepler field

Publication date :

01 October 2015

Journal title :

Monthly Notices of the Royal Astronomical Society

ISSN :

0035-8711

eISSN :

1365-2966

Publisher :

Oxford University Press, Oxford, United Kingdom

Volume :

452

Pages :

3334-3345

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://adsabs.harvard.edu/abs/2015MNRAS.452.3334S

Available on ORBi :

since 06 October 2015

Statistics

Number of views

34 (0 by ULiège)

Number of downloads

82 (0 by ULiège)

More statistics

Scopus citations^®

Scopus citations^®
without self-citations

OpenCitations

Bibliography

Abt H. A., 2009, AJ, 138, 28
Alentiev D., Kochukhov O., Ryabchikova T., Cunha M., Tsymbal V., Weiss W., 2012, MNRAS, 421, L82
Antoci V. et al., 2014, ApJ, 796, 118
Asplund M., Grevesse N., Sauval A. J., Scott P., 2009, ARA&A, 47, 481
Babcock H. W., 1947, ApJ, 105, 105
Babel J., 1994, A&A, 283, 189
Balmforth N. J., Cunha M. S., Dolez N., Gough D. O., Vauclair S., 2001, MNRAS, 323, 362
Balona L. A. et al., 2011a, MNRAS, 410, 517
Balona L. A. et al., 2011b, MNRAS, 413, 2651
Bigot L., Kurtz D. W., 2011, A&A, 536, A73
Bychkov V. D., Bychkova L. V., Madej J., 2009, MNRAS, 394, 1338
Cannon A. J., 1925, Ann. Harv. Coll. Obser., 100, 17
Cunha M. S., 2002, MNRAS, 333, 47
Cunha M. S., Gough D., 2000, MNRAS, 319, 1020
Cunha M. S., Alentiev D., Brandão I. M., Perraut K., 2013, MNRAS, 436, 1639
Debosscher J., Blomme J., Aerts C., De Ridder J., 2011, A&A, 529, A89
Donati J.-F., Landstreet J. D., 2009, ARA&A, 47, 333
Elkin V. G., Riley J. D., Cunha M. S., Kurtz D. W., Mathys G., 2005a, MNRAS, 358, 665
Elkin V. G., Kurtz D.W., Mathys G., Wade G. A., Romanyuk I. I., Kudryavtsev D. O., Smolkin S., 2005b, MNRAS, 358, 1100
Elkin V. G., Kurtz D. W., Mathys G., Freyhammer L. M., 2010, MNRAS, 404, L104
Elkin V. G., Kurtz D.W., Shibahashi H., Saio H., 2014, MNRAS, 444, 1344
Fehrenbach C., Burnage R., 1990, A&AS, 83, 91
Girish V. et al., 2001, A&A, 380, 142
González J. F., Hubrig S., Kurtz D.W., Elkin V., Savanov I., 2008, MNRAS, 384, 1140
Gray R. O., Corbally J. C., 2009, Stellar Spectral Classification. Princeton Univ. Press, Princeton, NJ
Gruberbauer M. et al., 2008, A&A, 480, 223
Handler G. et al., 2002, MNRAS, 330, 153
Handler G. et al., 2006, MNRAS, 366, 257
Holdsworth D. L., 2015, PhD thesis, Keele University, UK
Holdsworth D. L. et al., 2014a, MNRAS, 439, 2078
Holdsworth D. L., Smalley B., Kurtz D. W., Southworth J., Cunha M. S., Clubb K. I., 2014b, MNRAS, 443, 2049
Huber D. et al., 2008, A&A, 483, 239
Høg E. et al., 2000, A&A, 355, L27
Kochukhov O., Landstreet J. D., Ryabchikova T., Weiss W. W., Kupka F., 2002, MNRAS, 337, L1
Kochukhov O., Ryabchikova T., Bagnulo S., Lo Curto G., 2008a, Contrib. Astron. Obser. Skalnate Pleso, 38, 423
Kochukhov O., Ryabchikova T., Bagnulo S., Lo Curto G., 2008b, A&A, 479, L29
Kochukhov O., Bagnulo S., Lo Curto G., Ryabchikova T., 2009, A&A, 493, L45
Kochukhov O., Alentiev D., Ryabchikova T., Boyko S., Cunha M., Tsymbal V., Weiss W., 2013, MNRAS, 431, 2808
Kreidl T. J., Kurtz D. W., Bus S. J., Kuschnig R., Birch P. B., Candy M. P., Weiss W. W., 1991, MNRAS, 250, 477
Kurtz D. W., 1982, MNRAS, 200, 807
Kurtz D. W., Martinez P., 1994, Inf. Bull. Var. Stars, 4013, 1
Kurtz D. W., Martinez P., 1995, Inf. Bull. Var. Stars, 4209, 1
Kurtz D.W., Sullivan D. J., Martinez P., Tripe P., 1994a, MNRAS, 270, 674
Kurtz D. W., Martinez P., Tripe P., 1994b, MNRAS, 271, 421
Kurtz D. W., Martinez P., Koen C., Sullivan D. J., 1996, MNRAS, 281, 883
Kurtz D. W., van Wyk F., Roberts G., Marang F., Handler G., Medupe R., Kilkenny D., 1997a, MNRAS, 287, 69
Kurtz D. W., Martinez P., Tripe P., Hanbury A. G., 1997b, MNRAS, 289, 645
Kurtz D. W. et al., 2002, MNRAS, 330, L57
Kurtz D. W., Elkin V. G., Mathys G., 2005, MNRAS, 358, L6
Kurtz D. W., Elkin V. G., Cunha M. S., Mathys G., Hubrig S., WolffB., Savanov I., 2006, MNRAS, 372, 286
Kurtz D. W., Elkin V. G., Mathys G., 2007a, MNRAS, 380, 741
Kurtz D. W., Elkin V. G., Mathys G., van Wyk F., 2007b, MNRAS, 381, 1301
Kurtz D. W. et al., 2011, MNRAS, 414, 2550
Landstreet J. D., Mathys G., 2000, A&A, 359, 213
Martinez P., Kauffmann G., 1990, Inf. Bull. Var. Stars, 3507, 1
Martinez P., Kurtz D. W., 1990, Inf. Bull. Var. Stars, 3509, 1
Martinez P., Kurtz D. W., 1992, Inf. Bull. Var. Stars, 3750, 1
Martinez P., Kurtz D. W., Heller C. H., 1990a, MNRAS, 246, 699
Martinez P., Kurtz D. W., Kauffmann G., Jonson A. C., 1990b, Inf. Bull. Var. Stars, 3506, 1
Martinez P., Kurtz D. W., Kauffmann G. M., 1991, MNRAS, 250, 666
Martinez P., Kurtz D. W., Kreidl T. J., Koen C., van Wyk F., Marang F., Roberts G., 1993a, MNRAS, 263, 273
Martinez P., Kurtz D. W., Ashley R., 1993b, Inf. Bull. Var. Stars, 3844, 1
Martinez P., Kurtz D. W., van Wyk F., 1994, MNRAS, 271, 305
Martinez P., Kurtz D. W., Hoffman M. J. H., van Wyk F., 1995, MNRAS, 276, 1435
Martinez P., Koen C., Sullivan D. J., 1998a, MNRAS, 300, 188
Martinez P., Meintjes P., RatcliffS. J., Engelbrecht C., 1998b, A&A, 334, 606
Mason B. D., WycoffG. L., Hartkopf W. I., Douglass G. G., Worley C. E., 2001, AJ, 122, 3466
Mathys G., Lanz T., 1992, A&A, 256, 169
Mathys G., Hubrig S., Landstreet J. D., Lanz T., Manfroid J., 1997, A&AS, 123, 353
Mathys G., Kurtz D. W., Elkin V. G., 2007, MNRAS, 380, 181
Matthews J. M., Wehlau W. H., Kurtz D. W., 1987, ApJ, 313, 782
Mkrtichian D. E., Hatzes A. P., Saio H., Shobbrook R. R., 2008, A&A, 490, 1109
Morgan W. W., 1933, ApJ, 77, 330
Murphy S. J., 2012, MNRAS, 422, 665
Murphy S. J., 2014, PhD thesis, Univ. Central Lancashire, UK
Murphy S. J., Shibahashi H., Kurtz D. W., 2013, MNRAS, 430, 2986
Niemczura E. et al., 2015, MNRAS, 450, 2764
North P., 1985, A&A, 148, 165
Paxton B. et al., 2013, ApJS, 208, 4
Perryman M. A. C., ESA eds., 1997, ESA SP-1200, The HIPPARCOS and TYCHO Catalogues. ESA, Noordwijk
Raskin G. et al., 2011, A&A, 526, A69
Renson P., Manfroid J., 2009, A&A, 498, 961
Roeser S., Demleitner M., Schilbach E., 2010, AJ, 139, 2440
Ryabchikova T., Piskunov N., Kochukhov O., Tsymbal V., Mittermayer P., Weiss W. W., 2002, A&A, 384, 545
Ryabchikova T., Nesvacil N., Weiss W. W., Kochukhov O., Stütz C., 2004, A&A, 423, 705
Saio H., 2005, MNRAS, 360, 1022
Smith K. C., 1996, Ap&SS, 237, 77
Sousa S. G., Cunha M. S., 2008, MNRAS, 386, 531
Still M., Barclay T., 2012, Astrophysics Source Code Library, record ascl:1208.004
Stoehr F. et al., 2008, in Argyle R.W., Bunclark P. S., Lewis J. R., eds, ASP Conf. Ser. Vol. 394, Astronomical Data Analysis Software and Systems XVII. Astron. Soc. Pac., San Francisco, p. 505
Stȩpień K., 2000, A&A, 353, 227
Telting J. H. et al., 2014, Astron. Nachr., 335, 41
Torres G., Andersen J., Giménez A., 2010, A&AR, 18, 67
Watson C. L., Henden A. A., Price A., 2006, Soc. Astron. Sci., 25, p. 47
WolffS. C., 1983, NASA SP-463: The A-type Stars: Problems and Perspectives. NASA, Washington, DC
Zacharias N., Finch C. T., Girard T. M., Henden A., Bartlett J. L., Monet D. G., Zacharias M. I., 2013, AJ, 145, 44