Navegar

Colección

Datos Estadísticas

Artículo

Metcalfe, T.S.; Buccino, A.P.; Brown, B.P.; Mathur, S.; Soderblom, D.R.; Henry, T.J.; Mauas, P.J.D.; Petrucci, R.; Hall, J.C.; Basu, S. "Magnetic activity cycles in the exoplanet host star ε eridani" (2013) Astrophysical Journal Letters. 763(2)
Este artículo es de Acceso Abierto y puede ser descargado en su versión final desde nuestro repositorio
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

The active K2 dwarf ε Eri has been extensively characterized both as a young solar analog and more recently as an exoplanet host star. As one of the nearest and brightest stars in the sky, it provides an unparalleled opportunity to constrain stellar dynamo theory beyond the Sun. We confirm and document the 3-year magnetic activity cycle in ε Eri originally reported by Hatzes and coworkers, and we examine the archival data from previous observations spanning 45 years. The data show coexisting 3-year and 13-year periods leading into a broad activity minimum that resembles a Maunder minimum-like state, followed by the resurgence of a coherent 3-year cycle. The nearly continuous activity record suggests the simultaneous operation of two stellar dynamos with cycle periods of 2.95 ± 0.03 years and 12.7 ± 0.3 years, which, by analogy with the solar case, suggests a revised identification of the dynamo mechanisms that are responsible for the so-called "active" and "inactive" sequences as proposed by Böhm-Vitense. Finally, based on the observed properties of ε Eri, we argue that the rotational history of the Sun is what makes it an outlier in the context of magnetic cycles observed in other stars (as also suggested by its Li depletion), and that a Jovian-mass companion cannot be the universal explanation for the solar peculiarities. © 2013. The American Astronomical Society. All rights reserved..

Registro:

Documento: Artículo
Título:Magnetic activity cycles in the exoplanet host star ε eridani
Autor:Metcalfe, T.S.; Buccino, A.P.; Brown, B.P.; Mathur, S.; Soderblom, D.R.; Henry, T.J.; Mauas, P.J.D.; Petrucci, R.; Hall, J.C.; Basu, S.
Filiación:Space Science Institute, 4750 Walnut Street, Boulder, CO 80301, United States
Instituto de Astronomía y Física Del Espacio (CONICET), C.C. 67 Sucursal 28, C1428EHA-Buenos Aires, Argentina
Departamento de Física, FCEyN, Universidad de Buenos Aires, 1428 Caba, Argentina
Department of Astronomy, Center for Magnetic Self-Organization, University of Wisconsin, Madison, WI 53706-1582, United States
High Altitude Observatory, NCAR, P.O. Box 3000, Boulder, CO 80307, United States
Space Telescope Science Institute, 3700 San Martin Dr., Baltimore, MD 21218, United States
Department of Physics and Astronomy, Georgia State University, Atlanta, GA 30302, United States
Lowell Observatory, 1400 West Mars Hill Road, Flagstaff, AZ 86001, United States
Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520, United States
Palabras clave:stars: activity; stars: chromospheres; stars: individual (HD 22049); surveys
Año:2013
Volumen:763
Número:2
DOI: http://dx.doi.org/10.1088/2041-8205/763/2/L26
Título revista:Astrophysical Journal Letters
Título revista abreviado:Astrophys. J. Lett.
ISSN:20418205
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_20418205_v763_n2_p_Metcalfe.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20418205_v763_n2_p_Metcalfe

Referencias:

  • Anglada-Escudé, G., Butler, R.P., (2012) ApJS, 200 (2), p. 15. , 10.1088/0067-0049/200/2/15 0067-0049 15
  • Asplund, M., Grevesse, N., Sauval, A.J., Scott, P., (2009) ARA&A, 47, p. 481. , 10.1146/annurev.astro.46.060407.145222 0066-4146
  • Augustson, K.C., Brown, B.P., Brun, A.S., Miesch, M.S., Toomre, J., (2012) ApJ, 756 (2), p. 169. , 10.1088/0004-637X/756/2/169 0004-637X 169
  • Baines, E.K., Armstrong, J.T., (2012) ApJ, 748 (1), p. 72. , 10.1088/0004-637X/748/1/72 0004-637X 72
  • Baliunas, S.L., Donahue, R.A., Soon, W.H., (1995) ApJ, 438, p. 269. , 10.1086/175072
  • Bazot, M., Ireland, M.J., Huber, D., (2011) A&A, 526, p. 4. , 10.1051/0004-6361/201015679 0004-6361
  • Benedict, G.F., McArthur, B.E., Gatewood, G., (2006) AJ, 132 (5), p. 2206. , 10.1086/508323 1538-3881 2206
  • Böhm-Vitense, E., (2007) ApJ, 657 (1), p. 486. , 10.1086/510482 0004-637X 486
  • Bouvier, J., (2008) A&A, 489, p. 53. , 10.1051/0004-6361:200810574 0004-6361
  • Broomhall, A.-M., Chaplin, W.J., Elsworth, Y., Simoniello, R., (2012) MNRAS, 420, p. 1405. , 10.1111/j.1365-2966.2011.20123.x 0035-8711
  • Brown, B.P., Browning, M.K., Brun, A.S., Miesch, M.S., Toomre, J., (2008) ApJ, 689 (2), p. 1354. , 10.1086/592397 0004-637X 1354
  • Brown, B.P., Miesch, M.S., Browning, M.K., Brun, A.S., Toomre, J., (2011) ApJ, 731 (1), p. 69. , 10.1088/0004-637X/731/1/69 0004-637X 69
  • Buccino, A.P., Mauas, P.J.D., Mg II h+k emission lines as stellar activity indicators of main sequence F-K stars (2008) Astronomy and Astrophysics, 483 (3), pp. 903-910. , DOI 10.1051/0004-6361:20078925
  • Campbell, B., Walker, G.A.H., Yang, S., (1988) ApJ, 331, p. 902. , 10.1086/166608
  • Chaplin, W.J., Bedding, T.R., Bonanno, A., (2011) ApJL, 732, p. 5. , 10.1088/2041-8205/732/1/L5 0004-637X
  • Croll, B., Walker, G.A.H., Kuschnig, R., Matthews, J.M., Rowe, J.F., Walker, A., Rucinski, S.M., Weiss, W.W., Differential rotation of ε eridani detected by most (2006) Astrophysical Journal, 648 (1), pp. 607-613. , DOI 10.1086/505792
  • Cumming, A., Marcy, G.W., Butler, R.P., (1999) ApJ, 526 (2), p. 890. , 10.1086/308020 0004-637X 890
  • Dikpati, M., Gilman, P.A., Simulating and predicting solar cycles using a flux-transport dynamo (2006) Astrophysical Journal, 649 (1), pp. 498-514. , DOI 10.1086/506314
  • Duncan, D.K., Vaughan, Arthur, H., Wilson, Olin, C., (1991) ApJS, 76, p. 383. , 10.1086/191572 0067-0049
  • Fletcher, S.T., Broomhall, A.-M., Salabert, D., (2010) ApJL, 718, p. 19. , 10.1088/2041-8205/718/1/L19 0004-637X
  • Gonzalez, G., Carlson, M.K., Tobin, R.W., (2010) MNRAS, 403, p. 1368. , 10.1111/j.1365-2966.2009.16195.x 0035-8711
  • Gough, D.O., Kosovichev, A.G., (1993) IAU Colloq. 137, Inside the Stars, p. 541
  • Gray, D.F., Baliunas, S.L., (1995) ApJ, 441, p. 436. , 10.1086/175368
  • Greaves, J.S., Holland, W.S., Wyatt, M.C., (2005) ApJL, 619, p. 187. , 10.1086/428348 0004-637X
  • Grundahl, F., Christensen-Dalsgaard, J., Kjeldsen, H., (2008) The Art of Modeling Stars in the 21st Century, p. 465
  • Hall, J.C., Lockwood, G.W., Skiff, B.A., (2007) AJ, 133 (3), p. 862. , 10.1086/510356 1538-3881 862
  • Hatzes, A.P., Cochran, W.D., McArthur, B., Baliunas, S.L., Walker, G.A.H., Campbell, B., Irwin, A.W., Endl, M., EVIDENCE FOR A LONG-PERIOD PLANET ORBITING epsilon ERIDANI (2000) Astrophysical Journal, 544 (2 PART 2), pp. L145-L148. , DOI 10.1086/317319
  • Henry, T.J., Soderblom, D.R., Donahue, R.A., Baliunas, S.L., (1996) AJ, 111, p. 439. , 10.1086/117796
  • Houdek, G., Balmforth, N.J., Christensen-Dalsgaard, J., Gough, D.O., (1999) A&A, 351, p. 582. , 0004-6361
  • Isaacson, H., Fischer, D., (2010) ApJ, 725 (1), p. 875. , 10.1088/0004-637X/725/1/875 0004-637X 875
  • Jouve, L., Brown, B.P., Brun, A.S., (2010) A&A, 509, p. 32. , 10.1051/0004-6361/200913103 0004-6361
  • Kjeldsen, H., Bedding, T.R., (1995) A&A, 293, p. 87. , 0004-6361
  • Kjeldsen, H., Bedding, T.R., (2011) A&A, 529, p. 8. , 10.1051/0004-6361/201116789 0004-6361
  • Kjeldsen, H., Bedding, T.R., Butler, R.P., Christensen-Dalsgaard, J., Kiss, L.L., Mccarthy, C., Marcy, G.W., Wright, J.T., Solar-like oscillations in α Centauri B (2005) Astrophysical Journal, 635 (2), pp. 1281-1290. , DOI 10.1086/497530
  • Lomb, N.R., (1976) Ap&SS, 39, p. 447. , 10.1007/BF00648343 0004-640X
  • Matt, S.P., Do Cao, O., Brown, B.P., Brun, A.S., (2011) AN, 332, p. 897. , 10.1002/asna.201111624
  • Mauas, P.J.D., Buccino, A., Díaz, R., (2012) Comparative Magnetic Minima: Characterizing Quiet Times in the Sun and Stars, p. 317
  • Meléndez, J., Ramírez, I., (2007) ApJL, 669, p. 89. , 10.1086/523942 0004-637X
  • Metcalfe, T.S., Basu, S., Henry, T.J., (2010) ApJL, 723, p. 213. , 10.1088/2041-8205/723/2/L213 0004-637X
  • Metcalfe, T.S., Judge, P.G., Basu, S., (2009) Solar Analogs II Workshop, , arXiv:0909.5464
  • Nelson, N.J., Brown, B.P., Brun, A.S., Miesch, M.S., Toomre, J., (2013) ApJ, 762 (2), p. 73. , 10.1088/0004-637X/762/2/73 0004-637X 73
  • Paxton, B., Bildsten, L., Dotter, A., (2011) ApJS, 192 (1), p. 3. , 10.1088/0067-0049/192/1/3 0067-0049 3
  • Saar, S.H., Brandenburg, A., (1999) ApJ, 524 (1), p. 295. , 10.1086/307794 0004-637X 295
  • Samadi, R., Georgobiani, D., Trampedach, R., (2007) A&A, 463, p. 297. , 10.1051/0004-6361:20041953 0004-6361
  • Scargle, J.D., (1982) ApJ, 263, p. 835. , 10.1086/160554
  • Torrence, C., Compo, G.P., (1998) BAMS, 79, p. 61. , 10.1175/1520-0477(1998)079<0061:APGTWA>2.0.CO;2
  • Van Leeuwen, F., Validation of the new Hipparcos reduction (2007) Astronomy and Astrophysics, 474 (2), pp. 653-664. , DOI 10.1051/0004-6361:20078357
  • Verner, G.A., Chaplin, W.J., Elsworth, Y., The detectability of signatures of rapid variation in low-degree stellar p-mode oscillation frequencies (2006) Astrophysical Journal, 638 (1), pp. 440-445. , DOI 10.1086/498680
  • Walker, G.A.H., Walker, A.R., Irwin, A.W., (1995) Icar, 116, p. 359. , 10.1006/icar.1995.1130
  • Wilson, O.C., (1978) ApJ, 226, p. 379. , 10.1086/156618

Citas:

---------- APA ----------
Metcalfe, T.S., Buccino, A.P., Brown, B.P., Mathur, S., Soderblom, D.R., Henry, T.J., Mauas, P.J.D.,..., Basu, S. (2013) . Magnetic activity cycles in the exoplanet host star ε eridani. Astrophysical Journal Letters, 763(2).
http://dx.doi.org/10.1088/2041-8205/763/2/L26
---------- CHICAGO ----------
Metcalfe, T.S., Buccino, A.P., Brown, B.P., Mathur, S., Soderblom, D.R., Henry, T.J., et al. "Magnetic activity cycles in the exoplanet host star ε eridani" . Astrophysical Journal Letters 763, no. 2 (2013).
http://dx.doi.org/10.1088/2041-8205/763/2/L26
---------- MLA ----------
Metcalfe, T.S., Buccino, A.P., Brown, B.P., Mathur, S., Soderblom, D.R., Henry, T.J., et al. "Magnetic activity cycles in the exoplanet host star ε eridani" . Astrophysical Journal Letters, vol. 763, no. 2, 2013.
http://dx.doi.org/10.1088/2041-8205/763/2/L26
---------- VANCOUVER ----------
Metcalfe, T.S., Buccino, A.P., Brown, B.P., Mathur, S., Soderblom, D.R., Henry, T.J., et al. Magnetic activity cycles in the exoplanet host star ε eridani. Astrophys. J. Lett. 2013;763(2).
http://dx.doi.org/10.1088/2041-8205/763/2/L26