Evidence of non-thermal x-ray emission from HH 80

Thumbnail Image
Full text at PDC
Publication Date
Advisors (or tutors)
Journal Title
Journal ISSN
Volume Title
IOP Publishing
Google Scholar
Research Projects
Organizational Units
Journal Issue
Protostellar jets appear at all stages of star formation when the accretion process is still at work. Jets travel at velocities of hundreds of km s^-1, creating strong shocks when interacting with the interstellar medium. Several cases of jets have been detected in X-rays, typically showing soft emission. For the first time, we report evidence of hard X-ray emission possibly related to non-thermal processes not explained by previous models of the post-shock emission predicted in the jet/ambient interaction scenario. HH 80 is located at the south head of the jet associated with the massive protostar IRAS 18162-2048. It shows soft and hard X-ray emission in regions that are spatially separated, with the soft X-ray emission region situated behind the region of hard X-ray emission. We propose a scenario for HH 80 where soft X-ray emission is associated with thermal processes from the interaction of the jet with denser ambient matter and hard X-ray emission is produced by synchrotron radiation at the front shock.
© 2013. The American Astronomical Society. This work was supported by the Spanish Government (AYA2011-29754-C03-01 and AYA2011-29754-C03-03). C. S. P. was supported by the COSPAR Capacity Building Workshop Fellowship Program and the Universidad Nacional de La Plata to develop this work at the Universidad Complutense de Madrid. M. M. is supported through the ASI-INAF contract I/009/10/0. JFAC is a staff researcher of the CONICET and acknowledges support by grant PIP 2011 0100285. J.L.-S. would like to thank Drs. F. J. Carrera, P. G. Pérez González and S. Mateos for fruitful discussion on the spectral X-ray emission properties of AGN. We also acknowledges the referee of this manuscript for their suggestions and comments. Facilities: XMM-Newton (EPIC), Chandra (ACIS), Spitzer (IRAC, MIPS).
Unesco subjects
Araudo, A. T., & Rodríguez, L. F. 2012, in AIP Conf. Ser. 1505, High Energy Gamma-Ray Astronomy, ed. F. A. Aharonian, W. Hofmann, & F. M. Rieger (Melville, NY: AIP), 281 Bally, J., Feigelson, E., & Reipurth, B. 2003, ApJ, 584, 843 Bonito, R., Fridlund, C. V. M., Favata, F., et al. 2008, A&A, 484, 389 Bonito, R., Orlando, S., Miceli, M., et al. 2010a, A&A, 517, A68 Bonito, R., Orlando, S., Miceli, M., et al. 2011, ApJ, 737, 54 Bonito, R., Orlando, S., Peres, G., Favata, F., & Rosner, R. 2004, A&A, 424, L1 Bonito, R., Orlando, S., Peres, G., Favata, F., & Rosner, R. 2007, A&A, 462, 645 Bonito, R., Orlando, S., Peres, G., et al. 2010b, A&A, 511, A42 Bosch Ramón, V., Romero, G. E., Araudo, A. T., & Paredes, J. M. 2010, A&A, 511, A8 Carrasco González, C., Rodríguez, L. F., Anglada, G., et al. 2010, Sci, 330, 1209 Coffey, D., Rigliaco, E., Bacciotti, F., Ray, T. P., & Eislöffel, J. 2012, ApJ, 749, 139 Combi, J. A., Albacete Colombo, J. F., Pellizza, L., et al. 2011, Ap&SS, 331, 53 Della Ceca, R., Maccacaro, T., Caccianiga, A., et al. 2004, A&A, 428, 383 Favata, F., Bonito, R., Micela, G., et al. 2006, A&A, 450, L17 Favata, F., Fridlund, C. V. M., Micela, G., Sciortino, S., & Kaas, A. A. 2002, A&A, 386, 204 Ginzburg, V. L., & Syrovatskii, S. I. 1964, The Origin of Cosmic Rays (New York: Macmillan) Gómez de Castro, A. I., & Verdugo, E. 2001, ApJ, 548, 976 Gómez de Castro, A. I., & von Rekowski, B. 2011, MNRAS, 411, 849 Grosso, N., Feigelson, E. D., Getman, K. V., et al. 2006, A&A, 448, L29 Güdel, M., Skinner, S. L., Audard, M., Briggs, K. R., & Cabrit, S. 2008, A&A, 478, 797 Heathcote, S., Reipurth, B., & Raga, A. C. 1998, AJ, 116, 1940 Hollis, J. M., Oliversen, R. J., Michalitsianos, A. G., Kafatos, M., & Wagner, R. M. 1991, ApJ, 377, 227 Kastner, J. H., Franz, G., Grosso, N., et al. 2005, ApJS, 160, 511 Li, J., Kastner, J. H., Prigozhin, G. Y., et al. 2004, ApJ, 610, 1204 Liseau, R., Huldtgren, M., Fridlund, C. V. M., & Cameron, M. 1996, A&A, 306, 255 López García, M. A., López Santiago, J., Albacete Colombo, J. F., Pérez González, P. G., & de Castro, E. 2013, MNRAS, 429, 775 Martí, J., Rodríguez, L. F., & Reipurth, B. 1993, ApJ, 416, 208 Masqué, J. M., Girart, J. M., Estalella, R., Rodríguez, L. F., & Beltran, M. T. 2012, ApJ, 758, L10 Ortolani, S., & Dodorico, S. 1980, A&A, 83, L8 Pravdo, S. H., Feigelson, E. D., Garmire, G., et al. 2001, Natur, 413, 708 Pravdo, S. H., Tsuboi, Y., & Maeda, Y. 2004, ApJ, 605, 259 Reipurth, B., & Bally, J. 2001, ARA&A, 39, 403 Rodríguez, L. F., Garay, G., Brooks, K. J., & Mardones, D. 2005, ApJ, 626, 953 Rodríguez, L. F., & Reipurth, B. 1989, RMxAA, 17, 59 Schneider, P. C., Eislöffel, J., Güdel, M., et al. 2013, A&A, 550, L1 Strüder, L., Briel, U., Dennerl, K., et al. 2001, A&A, 365, L18 Tsujimoto, M., Koyama, K., Kobayashi, N., et al. 2004, PASJ, 56, 341 Turner, M. J. L., Abbey, A., Arnaud, M., et al. 2001, A&A, 365, L27