Modeling nonthermal emission from stellar bow shocks (Research Note)

Thumbnail Image
Full text at PDC
Publication Date
Advisors (or tutors)
Journal Title
Journal ISSN
Volume Title
EDP Sciencies
Google Scholar
Research Projects
Organizational Units
Journal Issue
Context. Runaway O- and early B-type stars passing through the interstellar medium at supersonic velocities and characterized by strong stellar winds may produce bow shocks that can serve as particle acceleration sites. Previous theoretical models predict the production of high-energy photons by nonthermal radiative processes, but their efficiency is still debated. Aims. We aim to test and explain the possibility of emission from the bow shocks formed by runaway stars traveling through the interstellar medium by using previous theoretical models. Methods. We applied our model to AE Aurigae, the first reported star with an X-ray detected bow shock, to BD+43 3654, in which the observations failed in detecting high-energy emission, and to the transition phase of a supergiant star in the late stages of its life. Results. From our analysis, we confirm that the X-ray emission from the bow shock produced by AE Aurigae can be explained by inverse Compton processes involving the infrared photons of the heated dust. We also predict low high-energy flux emission from the bow shock produced by BD+43 3654, and the possibility of high-energy emission from the bow shock formed by a supergiant star during the transition phase from blue to red supergiant. Conclusions. Bow shocks formed by different types of runaway stars are revealed as a new possible source of high-energy photons in our neighborhood.
© ESO, 2016. This work was supported by the Spanish Ministerio de Economía y Competitividad under grant AYA2011-29754-C03-03.
Unesco subjects
Adams, D. J. 1980, Bristol, Adam Hilger, Ltd. (Monographs on Astronomical Subjects, No. 6), 1980. 159 p., Acero, F., Lemoine-Goumard, M., Renaud, M., et al. 2015, A&A, 580, A74 Benaglia, P., Romero, G. E., Martí, J., Peri, C. S., & Araudo, A. T. 2010, A&A, 517, L10 Blaauw, A. 1961, Bull. Astron. Inst. Netherlands, 15, 265 Bosch Ramón, V., & Khangulyan, D. 2009, International Journal of Modern Physics D, 18, 347 Comerón, F., & Pasquali, A. 2007, A&A, 467, L23 del Valle, M. V., & Romero, G. E. 2012, A&A, 543, A56 del Valle, M. V., & Romero, G. E. 2014, A&A, 563, A96 Fullerton, A. W., Massa, D. L., & Prinja, R. K. 2006, ApJ, 637, 1025 Gvaramadze, V. V., & Bomans, D. J. 2008, A&A, 485, L29 Gvaramadze, V. V., Kniazev, A. Y., Kroupa, P., & Oh, S. 2011, A&A, 535, A29 Gies, D. R. 1987, ApJS, 64, 545 Gies, D. R., & Bolton, C. T. 1986, ApJS, 61, 419 Ginzburg, V. L., & Syrovatskii, S. I. 1964, The Origin of Cosmic Rays, New York: Macmillan, 1964, Hasinger, G., Altieri, B., Arnaud, M., et al. 2001, A&A, 365, L45 Hoogerwerf, R., de Bruijne, J. H. J., & de Zeeuw, P. T. 2000, ApJ, 544, L133 Howarth, I. D., Siebert, K. W., Hussain, G. A. J., & Prinja, R. K. 1997, MNRAS, 284, 265 Hubrig, S., Oskinova, L. M., & Schöller, M. 2011, Astronomische Nachrichten, 332, 147 Kelner, S. R., Aharonian, F. A., & Bugayov, V. V. 2006, Phys. Rev. D, 74, 034018 Kobulnicky, H. A., Gilbert, I. J., & Kiminki, D. C. 2010, ApJ, 710, 549 Longair, M. S. 2011, High Energy Astrophysics, by Malcolm S. Longair, Cambridge, UK: Cambridge University Press, 2011 López Santiago, J., Miceli, M., del Valle, M. V., et al. 2012, ApJ, 757, L6 Mackey, J., Mohamed, S., Neilson, H. R., Langer, N., & Meyer, D. M.-A. 2012, ApJ, 751, LL10 Maíz Apellániz, J., Walborn, N. R., Galué, H. Á., & Wei, L. H. 2004, ApJS, 151, 103 Markova, N., Puls, J., Repolust, T., & Markov, H. 2004, A&A, 413, 693 Mohamed, S., Mackey, J., & Langer, N. 2012, A&A, 541, AA1 Moffat, A. F. J., Marchenko, S. V., Seggewiss, W., et al. 1998, A&A, 331, 949 Moffat, A. F. J., Marchenko, S. V., Seggewiss, W., et al. 1999, A&A, 345, 321 Noriega Crespo, A., van Buren, D., & Dgani, R. 1997, AJ, 113, 780 Peri C.S., Benaglia, P., Brookes, D. P., Stevens, I. R., & Isequilla, N. L. 2012, A&A, 538, A108 Posson-Brown, J., Kashyap, V. L., Pease, D. O., & Drake, J. J. 2006, arXiv:astro-ph/0606387 Poveda, A., Ruiz, J., & Allen, C. 1967, Boletin de los Observatorios Tonantzintla y Tacubaya, 4, 86 Povich, M. S., Benjamin, R. A., Whitney, B. A., et al. 2008, ApJ, 689, 242 Repolust, T., Puls, J., & Herrero, A. 2004, A&A, 415, 349 Rybicki, G. B., & Lightman, A. P. 1979, New York, Wiley-Interscience, 1979. 393 p. Terada, Y., Tashiro, M. S., Bamba, A., et al. 2012, PASJ, 64, 138 Tetzlaff, N., Neuhaeuser, R., & Hohle, M. M. 2010, VizieR Online Data Catalog, 741, 190 van Buren, D., & McCray, R. 1988, ApJ, 329, L93 van Buren, D. 1993, Massive Stars: Their Lives in the Interstellar Medium, 35, 315 van Buren, D., Noriega Crespo, A., & Dgani, R. 1995, AJ, 110, 2914 Vink, J. S., de Koter, A., & Lamers, H. J. G. L. M. 2001, A&A, 369, 574 Wilkin, F. P. 1996, ApJ, 459, L31