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Long-term light curve variations of AGB stars: episodic mass-loss or binarity?

Published online by Cambridge University Press:  30 November 2022

Roberto Ortiz Open the ORCID record for Roberto Ortiz [Opens in a new window] ,
Alain Jorissen  and
Léa Planquart Open the ORCID record for Léa Planquart [Opens in a new window]
Roberto Ortiz
Affiliation:
Escola de Artes, Ciências & Humanidades, Universidade de São Paulo, Brazil email: rortiz@usp.br
Alain Jorissen
Affiliation:
Institut d’Astronomie et d’Astrophysique, Université Libre de Bruxelles, Belgium emails: Alain.Jorissen@ulb.be, lea.planquart@ulb.be
Léa Planquart
Affiliation:
Institut d’Astronomie et d’Astrophysique, Université Libre de Bruxelles, Belgium emails: Alain.Jorissen@ulb.be, lea.planquart@ulb.be
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Abstract

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A significant fraction of the stars near the tip of the AGB phase become regular or semi-regular (Mira-type, SRs) pulsators. However, some of these light curves have shown intriguing secondary minima or sharp dips with much longer periods. Although this phenomenon shows some resemblance with the R CrB variables, the light curve is generally symmetric before and after the dip, whereas in R CrB the luminosity recovers slower after its minimum. More recently, high-resolution ALMA CO observations revealed a spiral structure around some of these stars, which suggests the presence of a stellar or sub-stellar companion. In these cases, the long-term light curve minima could be caused by periodic eclipses of the primary by a spiral circumstellar structure, and the long-period would be related to the orbital period. In this paper we discuss the pros and cons of the various proposed scenarios for the long-term minima of pulsating AGB stars.

Keywords

AGB starsvariable starsbinariesmass-loss
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 16 , Symposium S366: The Origin of Outflows in Evolved Stars , November 2020 , pp. 184 - 189
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Copyright
© The Author(s), 2022. Published by Cambridge University Press on behalf of International Astronomical Union

References

Ayres, T.R., Linsky, J.L., Vaiana, G.S., Golub, L. & Rosner, R. 1981, ApJ, 250, 293 CrossRefGoogle Scholar
Baize, P. 1962, Journal des Observateurs, 45, 117 Google Scholar
Bedding, T.R., Zijlstra, A.A., Jones, A., Marang, F., Matsuura, M., Retter, A., Whitelock, P.A. & Yamamura, I. 2002, MNRAS, 337, 79 CrossRefGoogle Scholar
Clayton, G.C., Whitney, B. A., Stanford, S. A., Drilling, J. S., 1992, ApJ, 397, 652 CrossRefGoogle Scholar
Doan, L., Ramstedt, S., Vlemmings, W.H.T., Mohamed, S., Höfner, S., De Beck, E., Kerschbaum, F., Lindqvist, M., Maercker, M., Paladini, C. & Wittkowski, M. 2020, A&A, 633, A13 Google Scholar
Feast, M.W., Whitelock, P.A., Catchpole, R.M., Roberts, G. & Overbeek, M.D. 1984 MNRAS, 211, 331 CrossRefGoogle Scholar
Feast, M.W., Whitelock, P.A. & Marang, F. 2003, MNRAS, 346, 878 CrossRefGoogle Scholar
Hale, D.D.S., Bester, M., Danchi, W.C., Hoss, S., Lipman, E., Monnier, J.D., Tuthill, P.G., Townes, C.H., Johnson, M., Lopez, B. & Geballe,, T.R. 1997, ApJ, 490, 407 CrossRefGoogle Scholar
Hinkle, K.H., Lebzelter, T., Joyce, R.R. & Fekel, F.C. 2002, AJ, 123, 1002 CrossRefGoogle Scholar
Jorissen, A., Schmitt, J.H.M.M., Carquillat, J.M., Ginestet, N. & Bickert, K.F. 1996, A&A, 306, 467 Google Scholar
Kruszewski, A., Gehrels, T. & Serkowski, K. 1968, AJ, 73, 677 CrossRefGoogle Scholar
Lépine, J.R.D., Ortiz, R. & Epchtein, N. 1995, A&A, 299, 453 Google Scholar
Linsky, J.L. & Haisch, B.M. 1979, ApJ, 229, L27 CrossRefGoogle Scholar
Lloyd-Evans, T. 1997, MNRAS, 286, 839 CrossRefGoogle Scholar
Lykou, F., Zijlstra, A.A., Kluska, J., Lagadec, E., Tuthill, P.G., Avison, A., Norris, B.R.M. & Parker, Q.A. 2018, MNRAS, 480, 1006 Google Scholar
Mayall, M.W. 1963, JRASC, 57, 237 Google Scholar
Olivier, E.A. & Wood, P.R. 2003, ApJ, 584, 1035 CrossRefGoogle Scholar
Ortiz, R., Guerrero, M.A. & Costa, R.D.D. 2019, MNRAS, 482, 4697 CrossRefGoogle Scholar
Ortiz, R. & Guerrero, M.A. 2021, ApJ, 912, 93 CrossRefGoogle Scholar
Paladini, C., Klotz, D., Sacuto, S., Lagadec, E., Wittkowski, M., Richichi, A., Hron, J., Jorissen, A., Groenewegen, M.A.T., Kerschbaum, F., Verhoelst, T., Rau, G., Olofsson, H., Zhao-Geisler, R. & Matter, A. 2017 A&A, 600, 136 Google Scholar
Planquart, L., Jorissen, A., van Winckel, H. & van Eck, S. 2022 IAU Symp., 366 (this conference)Google Scholar
Ramstedt, S., Mohamed, S., Olander, T., Vlemmings, W.H.T., Khouri, T. & Liljegren, S. 2018, A&A, 616, A61 Google Scholar
Raveendran, A.V. & Kameswara Rao, N. 1989, A&A, 215, 63 Google Scholar
Raveendran, A.V. 2002, MNRAS, 336, 992 CrossRefGoogle Scholar
Sahai, R., Findeisen, K., Gil de Paz, A. & Sánchez-Contreras, C. 2008, ApJ, 689, 1274 CrossRefGoogle Scholar
Sahai, R., Sanz-Forcada, J., Sánchez-Contreras, C. & Stute, M. 2015, ApJ, 810, 77 CrossRefGoogle Scholar
Sahai, R., Sánchez-Contreras, C., Mangan, A.S., Sanz-Forcada, J., Muthumariappan, C. & Claussen, M.J. 2018, ApJ, 860, 105 CrossRefGoogle Scholar
Serkowski, K. 1966, ApJ, 144, 857 CrossRefGoogle Scholar
Serkowski, K. 1971, Kitt Peak Natl. Obs., Contrib., 554, 107 Google Scholar
Soszyński, I. & Udalski, A. 2014, ApJ, 788, 13 CrossRefGoogle Scholar
Soszyński, I., Olechowska, A., Ratajczak, M., Iwanek, P., Skowron, D.M., Mróz, P., Pietrukowicz, P., Udalski, A., Szymański, M.K., Skowron, J. et al. 2021, ApJ, 911, L22 CrossRefGoogle Scholar
Whitelock, P.A., Marang, F. & Feast, M. 2000, MNRAS, 319, 728 CrossRefGoogle Scholar
Whitelock, P.A., Feast, M.W., Marang, F. & Groenewegen, M.A.T. 2006, MNRAS, 369, 751 CrossRefGoogle Scholar
Winters, J.M., Fleischer, A.J. & Gauger, A. 1994, A&A, 290, 623 Google Scholar
Woitke, P. & Niccolini, G. 2005, A&A, 433, 1101 Google Scholar
Wood, P.R. et al. (MACHO collaboration) 1999, in IAU Symp., 191, 151, ed. T. Le Bertre, A. Lèbre & C. Waelkens (San Francisco: ASP)Google Scholar
Wood, P.R., Olivier, E.A. & Kawaler, S.D. 2004, ApJ, 604, 800 CrossRefGoogle Scholar