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2022ApJ...940..141A - Astrophys. J., 940, 141 (2022/December-1)

γ-Ray Emission from Classical Nova V392 Per: Measurements from Fermi and HAWC.

ALBERT A., ALFARO R., ALVAREZ C., ARTEAGA-VELAZQUEZ J.C., AVILA ROJAS D., AYALA SOLARES H.A., BABU R., BELMONT-MORENO E., BLOCHWITZ C., CABALLERO-MORA K.S., CAPISTRAN T., CARRAMINANA A., CASANOVA S., CHAPARRO-AMARO O., COTTI U., COTZOMI J., DE LA FUENTE E., DE LEON C., COUTINO DE LEON S., DIAZ HERNANDEZ R., DINGUS B.L., DUVERNOIS M.A., DUROCHER M., DIAZ-VELEZ J.C., ENGEL K., ESPINOZA C., FAN K.L., FANG K., FRAIJA N., GARCIA-GONZALEZ J.A., GARFIAS F., GONZALEZ M.M., GOODMAN J.A., HARDING J.P., HERNANDEZ S., HINTON J., HUANG D., HUEYOTL-ZAHUANTITLA F., HUNTEMEYER P., IRIARTE A., JOSHI V., LARA A., LEE W.H., LINNEMANN J.T., LONGINOTTI A.L., LUIS-RAYA G., LUNDEEN J., MALONE K., MARANDON V., MARTINEZ O., MARTINEZ-CASTRO J., MATTHEWS J.A., MIRANDA-ROMAGNOLI P., MORALES-SOTO J.A., MORENO E., MOSTAFA M., NAYERHODA A., NELLEN L., NEWBOLD M., NISA M.U., NORIEGA-PAPAQUI R., OMODEI N., PEISKER A., PEREZ ARAUJO Y., PEREZ-PEREZ E.G., RHO C.D., ROSA-GONZALEZ D., RUIZ-VELASCO E., SALAZAR-GALLEGOS D., SALESA GREUS F., SANDOVAL A., SERNA-FRANCO J., SMITH A.J., SON Y., SPRINGER R.W., TIBOLLA O., TOLLEFSON K., TORRES I., TORRES-ESCOBEDO R., TURNER R., URENA-MENA F., VILLASENOR L., WANG X., WILLOX E., ZEPEDA A., ZHOU H. (The HAWC Collaboration), CHOMIUK L., AYDI E., LI K.L., METZGER B.D. and VURM I.

Abstract (from CDS):

This paper reports on the γ-ray properties of the 2018 Galactic nova V392 Per, spanning photon energies ∼0.1 GeV-100 TeV by combining observations from the Fermi Gamma-ray Space Telescope and the HAWC Observatory. As one of the most rapidly evolving γ-ray signals yet observed for a nova, GeV γ-rays with a power-law spectrum with an index Γ = 2.0 ± 0.1 were detected over 8 days following V392 Per's optical maximum. HAWC observations constrain the TeV γ-ray signal during this time and also before and after. We observe no statistically significant evidence of TeV γ-ray emission from V392 Per, but present flux limits. Tests disfavor the extension of the Fermi Large Area Telescope spectrum to energies above 5 TeV by 2 standard deviations (95%) or more. We fit V392 Per's GeV γ-rays with hadronic acceleration models, incorporating optical observations, and compare the calculations with HAWC limits.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Novae - Cataclysmic variable stars - White dwarf stars - Gamma-rays - Binary stars

Simbad objects: 5

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