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H.E.S.S. observations of composite Seyfert-starburst galaxies

Fuente: arXiv

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Main Authors:	Collaboration, H. E. S. S., Acharyya, A., Aharonian, F., Ashkar, H., Backes, M., Martins, V. Barbosa, Batzofin, R., Becherini, Y., Berge, D., Böttcher, M., Boisson, C., Bolmont, J., Borowska, J., Brun, F., Bruno, B., Burger-Scheidlin, C., Casanova, S., Celic, J., Cerruti, M., Chandra, S., Chen, A., Chernyakova, M., Chibueze, J. O., Chibueze, O., Colafrancesco, S., Collins, T., Cornejo, B., Cotter, G., Mbarubucyeye, J. Damascene, Scarpin, J. de Assis, de Lavergne, M. de Bony, de Naurois, M., Wilhelmi, E. de Oña, Giler, A. G. Delgado, Djannati-Ataï, A., Djuvsland, J., Dmytriiev, A., Ebrahim, R., Egg, K., Nieves, C. Escañuela, Feijen, K., Filipovic, M. D., Fontaine, G., Funk, S., Gabici, S., Glicenstein, J. F., Glombitza, J., Goswami, P., Grondin, M. -H., Hess, B., Hinton, J. A., Holch, T. L., Holler, M., Horns, D., Jamrozy, M., Jankowsky, F., Jung-Richardt, I., Kasai, E., Kasprzak, K., Katarzyński, K., Kerszberg, D., Khélifi, B., Komin, N., Kosack, K., Kostunin, D., Lang, R. G., Lazarević, S., Lefranc, V., Lenain, J. -P., Liniewicz, P., Luashvili, A., Mackey, J., Malyshev, D., Marandon, V., Marchegiani, P., Mayer, M., Mehta, A., Mitchell, A. M. W., Moderski, R., Moghadam, M. O., Mohrmann, L., Moulin, E., Niemiec, J., O'Brien, P., Olivera-Nieto, L., Panny, S., Panter, M., Parsons, R. D., Pensec, U., Prokhorov, D. A., Pühlhofer, G., Punch, M., Quirrenbach, A., Regeard, M., Reimer, A., Reimer, O., Ren, H., Rieger, F., Rudak, B., Sabri, K., Sahakian, V., Salzmann, H., Sasaki, M., Schüssler, F., Shapopi, J. N. S., Said, W. Si, Spencer, S., Stawarz, Ł., Steinmassl, S., Tanaka, T., Taylor, A. M., Terrier, R., Tsirou, M., Unbehaun, T., van Eldik, C., Vecchi, M., Venter, C., Vink, J., Wach, T., Wierzcholska, A., Zech, A., Zhong, W.
Format:	Preprint
Published:	2026
Subjects:	High Energy Astrophysical Phenomena
Online Access:	Acceder al recurso
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author	Collaboration, H. E. S. S. Acharyya, A. Aharonian, F. Ashkar, H. Backes, M. Martins, V. Barbosa Batzofin, R. Becherini, Y. Berge, D. Böttcher, M. Boisson, C. Bolmont, J. Borowska, J. Brun, F. Bruno, B. Burger-Scheidlin, C. Casanova, S. Celic, J. Cerruti, M. Chandra, S. Chen, A. Chernyakova, M. Chibueze, J. O. Chibueze, O. Colafrancesco, S. Collins, T. Cornejo, B. Cotter, G. Mbarubucyeye, J. Damascene Scarpin, J. de Assis de Lavergne, M. de Bony de Naurois, M. Wilhelmi, E. de Oña Giler, A. G. Delgado Djannati-Ataï, A. Djuvsland, J. Dmytriiev, A. Ebrahim, R. Egg, K. Nieves, C. Escañuela Feijen, K. Filipovic, M. D. Fontaine, G. Funk, S. Gabici, S. Glicenstein, J. F. Glombitza, J. Goswami, P. Grondin, M. -H. Hess, B. Hinton, J. A. Holch, T. L. Holler, M. Horns, D. Jamrozy, M. Jankowsky, F. Jung-Richardt, I. Kasai, E. Kasprzak, K. Katarzyński, K. Kerszberg, D. Khélifi, B. Komin, N. Kosack, K. Kostunin, D. Lang, R. G. Lazarević, S. Lefranc, V. Lenain, J. -P. Liniewicz, P. Luashvili, A. Mackey, J. Malyshev, D. Malyshev, D. Marandon, V. Marchegiani, P. Mayer, M. Mehta, A. Mitchell, A. M. W. Moderski, R. Moghadam, M. O. Mohrmann, L. Moulin, E. Niemiec, J. O'Brien, P. Olivera-Nieto, L. Panny, S. Panter, M. Parsons, R. D. Pensec, U. Prokhorov, D. A. Pühlhofer, G. Punch, M. Quirrenbach, A. Regeard, M. Reimer, A. Reimer, O. Ren, H. Rieger, F. Rudak, B. Sabri, K. Sahakian, V. Salzmann, H. Sasaki, M. Schüssler, F. Shapopi, J. N. S. Said, W. Si Spencer, S. Stawarz, Ł. Steinmassl, S. Tanaka, T. Taylor, A. M. Terrier, R. Tsirou, M. Unbehaun, T. van Eldik, C. Vecchi, M. Venter, C. Vink, J. Wach, T. Wierzcholska, A. Zech, A. Zhong, W.
author_facet	Collaboration, H. E. S. S. Acharyya, A. Aharonian, F. Ashkar, H. Backes, M. Martins, V. Barbosa Batzofin, R. Becherini, Y. Berge, D. Böttcher, M. Boisson, C. Bolmont, J. Borowska, J. Brun, F. Bruno, B. Burger-Scheidlin, C. Casanova, S. Celic, J. Cerruti, M. Chandra, S. Chen, A. Chernyakova, M. Chibueze, J. O. Chibueze, O. Colafrancesco, S. Collins, T. Cornejo, B. Cotter, G. Mbarubucyeye, J. Damascene Scarpin, J. de Assis de Lavergne, M. de Bony de Naurois, M. Wilhelmi, E. de Oña Giler, A. G. Delgado Djannati-Ataï, A. Djuvsland, J. Dmytriiev, A. Ebrahim, R. Egg, K. Nieves, C. Escañuela Feijen, K. Filipovic, M. D. Fontaine, G. Funk, S. Gabici, S. Glicenstein, J. F. Glombitza, J. Goswami, P. Grondin, M. -H. Hess, B. Hinton, J. A. Holch, T. L. Holler, M. Horns, D. Jamrozy, M. Jankowsky, F. Jung-Richardt, I. Kasai, E. Kasprzak, K. Katarzyński, K. Kerszberg, D. Khélifi, B. Komin, N. Kosack, K. Kostunin, D. Lang, R. G. Lazarević, S. Lefranc, V. Lenain, J. -P. Liniewicz, P. Luashvili, A. Mackey, J. Malyshev, D. Malyshev, D. Marandon, V. Marchegiani, P. Mayer, M. Mehta, A. Mitchell, A. M. W. Moderski, R. Moghadam, M. O. Mohrmann, L. Moulin, E. Niemiec, J. O'Brien, P. Olivera-Nieto, L. Panny, S. Panter, M. Parsons, R. D. Pensec, U. Prokhorov, D. A. Pühlhofer, G. Punch, M. Quirrenbach, A. Regeard, M. Reimer, A. Reimer, O. Ren, H. Rieger, F. Rudak, B. Sabri, K. Sahakian, V. Salzmann, H. Sasaki, M. Schüssler, F. Shapopi, J. N. S. Said, W. Si Spencer, S. Stawarz, Ł. Steinmassl, S. Tanaka, T. Taylor, A. M. Terrier, R. Tsirou, M. Unbehaun, T. van Eldik, C. Vecchi, M. Venter, C. Vink, J. Wach, T. Wierzcholska, A. Zech, A. Zhong, W.
contents	Context: Composite galaxies that contain both Seyfert and starburst components may produce very high-energy (VHE; >100 GeV) gamma-ray emission at a wide range of spatial scales, from a few Schwarzschild radii of a supermassive black hole to dimensions of kiloparsec-size jet-driven outflows. In addition to supernova remnants, various sources have been suggested to explain data collected on composite galaxies, including multi-messenger neutrino and ultra-high-energy cosmic-ray data. Aims: The closest composite Seyfert-starburst galaxies (NGC 1068, the Circinus galaxy, and NGC 4945) are observed with the High Energy Stereoscopic System (H.E.S.S.) to provide constraints on cosmic-ray populations in these systems. Methods: Data obtained in H.E.S.S. observations have been analyzed to search for VHE gamma-ray counterparts to the GeV gamma-ray signals detected with Fermi-LAT and for potential spectral components in the VHE range. Results: No significant signals have been found in these H.E.S.S. data. Upper limits on the VHE gamma-ray fluxes were applied to constrain theoretical models involving different spectral components.
format	Preprint
id	arxiv_https___arxiv_org_abs_2603_21912
institution	arXiv
publishDate	2026
record_format	arxiv
spellingShingle	H.E.S.S. observations of composite Seyfert-starburst galaxies Collaboration, H. E. S. S. Acharyya, A. Aharonian, F. Ashkar, H. Backes, M. Martins, V. Barbosa Batzofin, R. Becherini, Y. Berge, D. Böttcher, M. Boisson, C. Bolmont, J. Borowska, J. Brun, F. Bruno, B. Burger-Scheidlin, C. Casanova, S. Celic, J. Cerruti, M. Chandra, S. Chen, A. Chernyakova, M. Chibueze, J. O. Chibueze, O. Colafrancesco, S. Collins, T. Cornejo, B. Cotter, G. Mbarubucyeye, J. Damascene Scarpin, J. de Assis de Lavergne, M. de Bony de Naurois, M. Wilhelmi, E. de Oña Giler, A. G. Delgado Djannati-Ataï, A. Djuvsland, J. Dmytriiev, A. Ebrahim, R. Egg, K. Nieves, C. Escañuela Feijen, K. Filipovic, M. D. Fontaine, G. Funk, S. Gabici, S. Glicenstein, J. F. Glombitza, J. Goswami, P. Grondin, M. -H. Hess, B. Hinton, J. A. Holch, T. L. Holler, M. Horns, D. Jamrozy, M. Jankowsky, F. Jung-Richardt, I. Kasai, E. Kasprzak, K. Katarzyński, K. Kerszberg, D. Khélifi, B. Komin, N. Kosack, K. Kostunin, D. Lang, R. G. Lazarević, S. Lefranc, V. Lenain, J. -P. Liniewicz, P. Luashvili, A. Mackey, J. Malyshev, D. Malyshev, D. Marandon, V. Marchegiani, P. Mayer, M. Mehta, A. Mitchell, A. M. W. Moderski, R. Moghadam, M. O. Mohrmann, L. Moulin, E. Niemiec, J. O'Brien, P. Olivera-Nieto, L. Panny, S. Panter, M. Parsons, R. D. Pensec, U. Prokhorov, D. A. Pühlhofer, G. Punch, M. Quirrenbach, A. Regeard, M. Reimer, A. Reimer, O. Ren, H. Rieger, F. Rudak, B. Sabri, K. Sahakian, V. Salzmann, H. Sasaki, M. Schüssler, F. Shapopi, J. N. S. Said, W. Si Spencer, S. Stawarz, Ł. Steinmassl, S. Tanaka, T. Taylor, A. M. Terrier, R. Tsirou, M. Unbehaun, T. van Eldik, C. Vecchi, M. Venter, C. Vink, J. Wach, T. Wierzcholska, A. Zech, A. Zhong, W. High Energy Astrophysical Phenomena Context: Composite galaxies that contain both Seyfert and starburst components may produce very high-energy (VHE; >100 GeV) gamma-ray emission at a wide range of spatial scales, from a few Schwarzschild radii of a supermassive black hole to dimensions of kiloparsec-size jet-driven outflows. In addition to supernova remnants, various sources have been suggested to explain data collected on composite galaxies, including multi-messenger neutrino and ultra-high-energy cosmic-ray data. Aims: The closest composite Seyfert-starburst galaxies (NGC 1068, the Circinus galaxy, and NGC 4945) are observed with the High Energy Stereoscopic System (H.E.S.S.) to provide constraints on cosmic-ray populations in these systems. Methods: Data obtained in H.E.S.S. observations have been analyzed to search for VHE gamma-ray counterparts to the GeV gamma-ray signals detected with Fermi-LAT and for potential spectral components in the VHE range. Results: No significant signals have been found in these H.E.S.S. data. Upper limits on the VHE gamma-ray fluxes were applied to constrain theoretical models involving different spectral components.
title	H.E.S.S. observations of composite Seyfert-starburst galaxies
topic	High Energy Astrophysical Phenomena
url	https://arxiv.org/abs/2603.21912