FR Cnc revisited: photometry, polarimetry and spectroscopy

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Golovin, A.
Gálvez Ortiz, M. C.
Hernán Obispo, M.
Andreev, M.
Barnes, J. R.
Pavlenko, E.
Pandey, J. C.
Martínez Arnaiz, R.
Medhi, B. J.
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This paper is part of a multiwavelength study aimed at using complementary photometric, polarimetric and spectroscopic data to achieve an understanding of the activity process in late-type stars. Here, we present the study of FR Cnc, a young, active and spotted star. We performed analysis of All Sky Automated Survey 3 (ASAS-3) data for the years 2002–08 and amended the value of the rotational period to be 0.826518 d. The amplitude of photometric variations decreased abruptly in the year 2005, while the mean brightness remained the same, which was interpreted as a quick redistribution of spots. BVR_C and I_C broad-band photometric calibration was performed for 166 stars in FR Cnc vicinity. The photometry at Terskol Observatory shows two brightening episodes, one of which occurred at the same phase as the flare of 2006 November 23. Polarimetric BVR observations indicate the probable presence of a supplementary source of polarization. We monitored FR Cnc spectroscopically during the years 2004–08. We concluded that the radial velocity changes cannot be explained by the binary nature of FR Cnc. We determined the spectral type of FR Cnc as K7V. Calculated galactic space-velocity components (U, V, W) indicate that FR Cnc belongs to the young disc population and might also belong to the IC 2391 moving group. Based on Li Iλ6707.8 measurement, we estimated the age of FR Cnc to be between 10 and 120 Myr. Doppler tomography was applied to create a starspot image of FR Cnc. We optimized the goodness of fit to the deconvolved profiles for axial inclination, equivalent width and v sin i, finding v sin  i=46.2 km s^−1 and i= 55°. We also generated a syntheticV-band light curve based on Doppler imaging that makes simultaneous use of spectroscopic and photometric data. This synthetic light curve displays the same morphology and amplitude as the observed one. The starspot distribution of FR Cnc is also of interest since it is one of the latest spectral types to have been imaged. No polar spot was detected on FR Cnc.
© 2012 The Authors. © Monthly Notices of the Royal Astronomical Society. © 2012 RAS. MCG acknowledges the financial support from the European Commission in the form of Marie Curie Intra European Fellowship (PIEF-GA-2008-220679) and the partial support by the Spanish MICINN under the Consolider-Ingenio 2010 Programme grant CSD2006-00070: First Science with the GTC ( MCG and JRB have also received support from RoPACS during this research, a Marie Curie Initial Training Network funded by the European Commission's Seventh Framework Programme. This work was partly supported by the Spanish Ministerio de Ciencia e Innovación (MICINN), Programa Nacional de Astronomía y Astrofísica under grants AYA2008-00695 and AYA2008-06423-C03-03, and the Comunidad de Madrid under PRICIT project S2009/ESP-1496 (AstroMadrid). AG is thankful to Universidad Complutense de Madrid for hospitality and for all the efforts and the help during his visit to Spain in 2008 July and 2009 February.
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Alekseev I. Y., 2003, Astron. Rep., 47, 430 Antoja T., Figueras F., Fernández D., Torra J., 2008, A&A, 490, 135 Arévalo M. J., Lázaro C., 1999, AJ, 118, 1015 Baliunas S. L., Nesme-Ribes E., Sokoloff D., Soon W. H., 1996, ApJ, 460, 848 Barden S. C., 1985, ApJ, 295, 162 Barnes J. R., Collier Cameron A., 2001, MNRAS, 326, 950 Barnes J. R., Collier Cameron A., Unruh Y. C., Donati J. F., Hussain G. A. J., 1998, MNRAS, 299, 904 Barnes J. R., Cameron A. C., Lister T. A., Pointer G. R., Still M. D., 2005, MNRAS, 356, 1501 Beavers W. I., Eitter J. J., Ketelsen D. A., Oesper D. A., 1979, PASP, 91, 698 Bonfils X. et al., 2007, A&A, 474, 293 Bonnarel F. et al., 2000, A&AS, 143, 33 Breger M. et al., 1993, A&A, 271, 482 Breger M. et al., 1999, A&A, 349, 225 Buzasi D. L., 1989, PhD thesis, Pennsylvania State Univ. Chester M. M., 1991, PhD thesis, Pennsylvania State Univ. Collier Cameron A., 2001, in Boffin H. M. J., Steeghs D., Cuypers J., eds, Lecture Notes Phys., Vol. 573, Astrotomography - Indirect Imaging Methods in Observational Astronomy. Springer, Berlin, p. 183 Donati J.-F., Semel M., Carter B., Rees D. E., Collier Cameron A., 1997, MNRAS, 291, 658 Donati J.-F. et al., 2008, MNRAS, 390, 545 Dorren J. D., Guinan E. F., Dewarf L. E., 1994, in Caillault J.-P., ed., ASP Conf. Ser. Vol. 64, Cool Stars, Stellar Systems, and the Sun, Astron. Soc. Pac., San Francisco, p. 399 Eggen O. J., 1984a, AJ, 89, 1358 Eggen O. J., 1984b, ApJS, 55, 597 Eggen O. J., 1989, PASP, 101, 366 Elias N. M., II, Dorren J. D., 1990, AJ, 100, 818 Elvis M., Plummer D., Schachter J., Fabbiano G., 1992, ApJS, 80, 257 ESA, 1997, ESA SP-1200, The Hipparcos and Tycho Catalogues. ESA Publications Division, Noordwijk Famaey B., Pont F., Luri X., Udry S., Mayor M., Jorissen A., 2007, A&A, 461, 957 Famaey B., Siebert A., Jorissen A., 2008, A&A, 483, 453 Favata F., Barbera M., Micela G., Sciortino S., 1993, A&A, 277, 428 Fisher R. A., 1935, Design of Experiments. Oliver and Boyd, Edinburgh Fisher R. A., 1936, J. R. Anthropol. Inst., 66, 57 Gálvez M. C., Montes D., Fernández Figueroa M. J., López Santiago J., De Castro E., Cornide M., 2002, A&A, 389, 524 Gálvez M. C., Montes D., Fernández Figueroa M. J., de Castro E., Cornide M., 2007, A&A, 472, 587 Gálvez M. C., Montes D., Fernández Figueroa M. J., de Castro E., Cornide M., 2009, AJ, 137, 3965 Golovin A., Pavlenko E., Kuznyetsova Y., Krushevska V., 2007, Inf. Bull. Var. Stars, 5748, 1 Granzer T., Schüssler M., Caligari P., Strassmeier K. G., 2000, A&A, 355, 1087 Hall J. C., 1996, PASP, 108, 313 Hall J. C., Ramsey L. W., 1992, AJ, 104, 1942 Huovelin J., Saar S. H., 1991, ApJ, 374, 319 Jeffers S. V., Donati J.-F., Collier Cameron A., 2007, MNRAS, 375, 567 Johnson D. R. H., Soderblom D. R., 1987, AJ, 93, 864 Kallinger T., Reegen P., Weiss W. W., 2008, A&A, 481, 571 Kazarovets E. V., Samus N. N., Durlevich O. V., Frolov M. S., Antipin S. V., Kireeva N. N., Pastukhova E. N., 1999, Inf. Bull. Var. Stars, 4659, 1 Kupka F., Piskunov N., Ryabchikova T. A., Stempels H. C., Weiss W. W., 1999, A&AS, 138, 119 Kupka F. G., Ryabchikova T. A., Piskunov N. E., Stempels H. C., Weiss W. W., 2000, Baltic Astron., 9, 590 Kurucz R. L., 1993, in Dworetsky M. M., Castelli F., Faraggiana R., eds, ASP Conf. Ser. Vol. 44, Peculiar versus Normal Phenomena in A-type and Related Stars. Astron. Soc. Pac., San Francisco, p. 87 Kuschnig R., Weiss W. W., Gruber R., Bely P. Y., Jenkner H., 1997, A&A, 328, 544 Lenz P., Breger M., 2005, Commun. Asteroseismol., 146, 53 López Santiago J., Micela G., Montes D., 2009, A&A, 499, 129 López Santiago J., Montes D., Gálvez Ortiz M. C., Crespo Chacón I., Martínez Arnaiz R. M., Fernández Figueroa M. J., de Castro E., Cornide M., 2010, A&A, 514, A97 Lorente R., Montesinos B., 2005, AJ, 632, 1104 Maldonado J., Martínez Arnaiz R. M., Eiroa C., Montes D., Montesinos B., 2010, A&A, 521, A12 Mamajek E. E., Hillenbrand L. A., 2008, ApJ, 687, 1264 Martínez Fiorenzano A. F., Gratton R. G., Desidera S., Cosentino R., Endl M., 2005, A&A, 442, 775 Martínez Arnaiz R., Maldonado J., Montes D., Eiroa C., Montesinos B., 2010, A&A, 520, A79 Medhi B. J., Maheswar G., Brijesh K., Pandey J. C., Kumar T. S., Sagar R., 2007, MNRAS, 378, 881 Melo C., Pasquini L., de Medeiros J. R., 2004, in Maeder A., Eenens P., eds, Proc. IAU Symp. 215, Stellar Rotation. Astron. Soc. Pac., San Francisco, p. 455 Mohanty S., Basri G., 2003, ApJ, 583, 451 Montes D. et al., 2000, A&AS, 146, 103 Montes D., López Santiago J., Gálvez M. C., Fernández Figueroa M. J., De Castro E., Cornide M., 2001a, MNRAS, 328, 45 Montes D., López Santiago J., Fernández Figueroa M. J., Gálvez M. C., 2001b, A&A, 379, 976 Montgomery M. H., Odonoghue D., 1999, Delta Scuti Star Newslett., 13, 28 Morin J. et al., 2008, MNRAS, 390, 567 Noyes R. W., Hartmann L. W., Baliunas S. L., Duncan D. K., Vaughan A. H., 1984, ApJ, 279, 763 O’Neal D., Saar S. H., Neff J. E., 1996, ApJ, 463, 766 O’Neal D., Neff J. E., Saar S. H., 1998, ApJ, 507, 919 O’Neal D., Neff J. E., Saar S. H., Cuntz M., 2004, AJ, 128, 1802 Pandey J. C., 2003, Bull. Astron. Soc. India, 31, 329 Pandey J. C., Singh K. P., Sagar R., Drake S. A., 2002, Inf. Bull. Var. Stars, 5351, 1 Pandey J. C., Singh K. P., Drake S. A., Sagar R., 2005, AJ, 130, 1231 Pandey J. C., Medhi B. J., Sagar R., Pandey A. K., 2009, MNRAS, 396, 1004 Pepper J., Stanek K. Z., Pogge R. W., Latham D. W., DePoy D. L., Siverd R., Poindexter S., Sivakoff G. R., 2008, AJ, 135, 907 Perryman M. A. C. et al., 1997, A&A, 323, L49 Pojmanski G., 2002, Acta Astron., 52, 397 Queloz D., Allain S., Mermilliod J.-C., Bouvier J., Mayor M., 1998, A&A, 335, 183 Queloz D. et al., 2001, A&A, 379, 279 Saar S. H., Huovelin J., 1993, ApJ, 404, 739 Sbordone L., 2005, Mem. Soc. Astron. Ital. Suppl., 8, 61 Sbordone L., Bonifacio P., Castelli F., Kurucz R. L., 2004, Mem. Soc. Astron. Ital. Suppl., 5, 93 Schachter J. F., Remillard R., Saar S. H., Favata F., Sciortino S., Barbera M., 1996, ApJ, 463, 747 Schmidt G. D., Elston R., Lupie O. L., 1992, AJ, 104, 1563 Schüssler M., Caligari P., Ferriz Mas A., Solanki S. K., Stix M., 1996, A&A, 314, 503 Tonry J., Davis M., 1979, AJ, 84, 1511 Upgren A. R., Sperauskas J., Boyle R. P., 2002, Baltic Astron., 11, 91 Voges W. et al., 1999, A&A, 349, 389 Zhao J., Zhao G., Chen Y., 2009, ApJ, 692, L113