Studying the H-alpha line of the B[ e ] supergiant binary GG Carinae using high-cadence optical spectroscopy

Proceedings of the International Astronomical Union (2019) 123-124

Authors:

A Porter, K Blundell, S Lee

Abstract:

© International Astronomical Union 2019. We present a case study of GG Carinae (GG Car), a Galactic B[ e ] supergiant binary having significant eccentricity (0.28), based on Global Jet Watch spectroscopy data which has been collecting high-time-sampled optical spectra since early 2015. GG Car has so far not been observed in the X-ray band, however it is of similar phenomenology to known X-ray binaries and may therefore be an obscured X-ray source. We have discovered that the absorption component of the H-alpha line displays a '1/462-478-day period in both equivalent width and wavelength centroid indicating cycles in the dynamics of the circumstellar environment, such as precession of the circumbinary or circumprimary disk. Circumbinary disk precession is an as-of-yet underexplored origin of super-orbital variations in the X-ray flux of X-ray binaries, since the rate of precession is generally much longer than the orbital period of the inner binary.

Study of the X-ray pulsar IGR J19294+1816 with NuSTAR: Detection of cyclotron line and transition to accretion from the cold disk

Astronomy & Astrophysics EDP Sciences 621 (2019) a134

Authors:

Sergey S Tsygankov, Victor Doroshenko, Alexander A Mushtukov, Alexander A Lutovinov, Juri Poutanen

Monte Carlo studies for the optimisation of the Cherenkov Telescope Array layout

Astroparticle Physics (2019)

Authors:

Samuel Timothy Spencer, A Acharyya, I Agudo, EO Angüner, R Alfaro, J Alfaro, C Alispach, R Aloisio, R Alves Batista, J-P Amans, L Amati, E Amato, G Ambrosi, LA Antonelli, C Aramo, T Armstrong, F Arqueros, L Arrabito, K Asano, H Ashkar, C Balazs, M Balbo, B Balmaverde, P Barai, A Barbano, M Barkov, U Barres de Almeida, JA Barrio, D Bastieri, J Becerra González, J Becker Tjus, L Bellizzi, W Benbow, E Bernardini, MI Bernardos, K Bernlöhr, A Berti, M Berton, B Bertucci, V Beshley, B Biasuzzi, C Bigongiari, R Bird, E Bissaldi, J Biteau, O Blanch, J Blazek, C Boisson, G Bonanno, A Bonardi, C Bonavolontá, G Bonnoli, P Bordas, M Böttcher, J Bregeon, A Brill, AM Brown, K Brügge, P Brun, P Bruno, A Bulgarelli, T Bulik, M Burton, A Burtovoi, G Busetto, R Cameron, R Canestrari, M Capalbi, A Caproni, R Capuzzo-Dolcetta, P Caraveo, S Caroff, R Carosi, S Casanova, E Cascone, F Cassol, F Catalani, O Catalano, D Cauz, M Cerruti, S Chaty, A Chen, M Chernyakova, G Chiaro, M Cie´slar, SM Colak, V Conforti, E Congiu, JL Contreras, J Cortina, A Costa, H Costantini, G Cotter, P Cristofari, P Cumani, G Cusumano, A D’Aí, F D’Ammando, L Dangeon, P Da Vela, F Dazzi, A De Angelis, V De Caprio, R de Cássia dos Anjos, F De Frondat, EM de Gouveia Dal Pino, B De Lotto, D De Martino, M de Naurois, E de O na Wilhelmi, F de Palma, V de Souza, M Del Santo, C Delgado, D della Volpe, T Di Girolamo, F Di Pierro, L Di Venere, C Díaz, S Diebold, A Djannati-Ataï, A Dmytriiev, D Dominis Prester, A Donini, D Dorner, M Doro, J-L Dournaux, J Ebr, TRN Ekoume, D Elsässer, G Emery, D Falceta-Goncalves, E Fedorova, S Fegan, Q Feng, G Ferrand, E Fiandrini, A Fiasson, M Filipovic, V Fioretti, M Fiori, S Flis, MV Fonseca, G Fontaine, L Freixas Coromina, S Fukami, Y Fukui, S Funk, M Füßling, D Gaggero, G Galanti, RJ Garcia López, M Garczarczyk, D Gascon, T Gasparetto, M Gaug, A Ghalumyan, F Gianotti, G Giavitto, N Giglietto, F Giordano, M Giroletti, J Gironnet, J-F Glicenstein, R Gnatyk, P Goldoni, JM González, MM González, KN Gourgouliatos, T Grabarczyk, J Granot, D Green, T Greenshaw, M-H Grondin, O Gueta, D Hadasch, T Hassan, M Hayashida, M Heller, O Hervet, J Hinton, N Hiroshima, B Hnatyk, W Hofmann, P Horvath, M Hrabovsky, D Hrupec, TB Humensky, M Hütten, T Inada, F Iocco, M Ionica, M Iori, Y Iwamura, M Jamrozy, P Janecek, D Jankowsky, P Jean, L Jouvin, J Jurysek, P Kaaret, LHS Kadowaki, S Karkar, D Kerszberg, B Khélifi, D Kieda, S Kimeswenger, W Klu´zniak, J Knapp, J Knödlseder, Y Kobayashi, B Koch, J Kocot, N Komin, A Kong, G Kowal, M Krause, H Kubo, J Kushida, P Kushwaha, V La Parola, G La Rosa, M Lallena Arquillo, RG Lang, J Lapington, O Le Blanc, J Lefaucheur, MA Leigui de Oliveira, M Lemoine-Goumard, J-P Lenain, G Leto, R Lico, E Lindfors, T Lohse, S Lombardi, F Longo, A Lopez, M López, A Lopez-Oramas, R López-Coto, S Loporchio, PL Luque-Escamilla, E Lyard, MC Maccarone, E Mach, C Maggio, P Majumdar, G Malaguti, M Mallamaci, D Mandat, G Maneva, M Manganaro, S Mangano, M Marculewicz, M Mariotti, J Martí, M Martínez, G Martínez, H Martínez-Huerta, S Masuda, N Maxted, D Mazin, J-L Meunier, M Meyer, S Micanovic, R Millul, IA Minaya, A Mitchell, T Mizuno, R Moderski, L Mohrmann, T Montaruli, A Moralejo, D Morcuende, G Morlino, A Morselli, E Moulin, R Mukherjee, P Munar, C Mundell, T Murach, A Nagai, T Nagayoshi, T Naito, T Nakamori, R Nemmen, J Niemiec, D Nieto, M Nievas Rosillo, M Niko\lajuk, D Ninci, K Nishijima, K Noda, D Nosek, M Nöthe, S Nozaki, M Ohishi, Y Ohtani, A Okumura, RA Ong, M Orienti, R Orito, M Ostrowski, N Otte, Z Ou, I Oya, A Pagliaro, M Palatiello, M Palatka, R Paoletti, JM Paredes, G Pareschi, N Parmiggiani, RD Parsons, B Patricelli, A Pe’er, M Pech, P Pe nil Del Campo, J Pérez-Romero, M Perri, M Persic, P-O Petrucci, O Petruk, K Pfrang, Q Piel, E Pietropaolo, M Pohl, M Polo, J Poutanen, E Prandini, N Produit, H Prokoph, M Prouza, H Przybilski, G Pühlhofer, M Punch, F Queiroz, A Quirrenbach, S Rainò, R Rando, S Razzaque, O Reimer, N Renault-Tinacci, Y Renier, D Ribeiro, M Ribó, J Rico, F Rieger, V Rizi, G Rodriguez Fernandez, JC Rodriguez-Ramirez, JJ Rodrí-guez Vázquez, P Romano, G Romeo, M Roncadelli, J Rosado, G Rowell, B Rudak, A Rugliancich, C Rulten, I Sadeh, L Saha, T Saito, S Sakurai, F Salesa Greus, P Sangiorgi, H Sano, M Santander, A Santangelo, R Santos-Lima, A Sanuy, K Satalecka, FG Saturni, U Sawangwit, S Schlenstedt, P Schovanek, F Schussler, U Schwanke, E Sciacca, S Scuderi, K Sedlaczek, M Seglar-Arroyo, O Sergijenko, K Seweryn, A Shalchi, RC Shellard, H Siejkowski, A Sillanpää, A Sinha, G Sironi, V Sliusar, A Slowikowska, H Sol, A Specovius, S Spencer, G Spengler, A Stamerra, S Stanič, L Stawarz, S Stefanik, T Stolarczyk, U Straumann, T Suomijarvi, P ´Swierk, T Szepieniec, G Tagliaferri, H Tajima, T Tam, F Tavecchio, L Taylor, LA Tejedor, P Temnikov, T Terzic, V Testa, L Tibaldo, CJ Todero Peixoto, F Tokanai, L Tomankova, D Tonev, DF Torres, G Tosti, L Tosti, N Tothill, F Toussenel, G Tovmassian, P Travnicek, C Trichard, G Umana, V Vagelli, M Valentino, B Vallage, P Vallania, L Valore, J Vandenbroucke, GS Varner, G Vasileiadis, V Vassiliev, M Vázquez Acosta, M Vecchi, S Vercellone, S Vergani, GP Vettolani, A Viana, CF Vigorito, J Vink, V Vitale, H Voelk, A Vollhardt, S Vorobiov, SJ Wagner, R Walter, F Werner, R White, A Wierzcholska, M Will, DA Williams, R Wischnewski, L Yang, T Yoshida, T Yoshikoshi, M Zacharias, L Zampieri, M Zavrtanik, D Zavrtanik, AA Zdziarski, A Zech, H Zechlin, A Zenin, VI Zhdanov, S Zimmer, J Zorn

On the maximum energy of protons in the hotspots of AGN jets

EPJ Web of Conferences EDP Sciences 210 (2019) 04006

Authors:

Anabella T Araudo, Anthony R Bell, James Matthews, Katherine Blundell

Possible Phase-dependent Absorption Feature in the X-Ray Spectrum of the Middle-aged PSR J0659+1414

The Astrophysical Journal American Astronomical Society 869:2 (2018) 97

Authors:

Prakash Arumugasamy, Oleg Kargaltsev, Bettina Posselt, George G Pavlov, Jeremy Hare