2020ApJ...894L..16A


Query : 2020ApJ...894L..16A

2020ApJ...894L..16A - Astrophys. J., 894, L16-L16 (2020/May-2)

Probing the magnetic field in the GW170817 outflow using H.E.S.S. Observations.

ABDALLA H., ADAM R., AHARONIAN F., AIT BENKHALI F., ANGUNER E.O., ARAKAWA M., ARCARO C., ARMAND C., ARMSTRONG T., ASHKAR H., BACKES M., BAGHMANYAN V., BARBOSA-MARTINS V., BARNACKA A., BARNARD M., BECHERINI Y., BERGE D., BERNLOHR K., BLACKWELL R., BOTTCHER M., BOISSON C., BOLMONT J., BONNEFOY S., BREGEON J., BREUHAUS M., BRUN F., BRUN P., BRYAN M., BUCHELE M., BULIK T., BYLUND T., CAROFF S., CAROSI A., CASANOVA S., CERRUTI M., CHAND T., CHANDRA S., CHEN A., COTTER G., CURYLO M., DAVIDS I.D., DAVIES J., DEIL C., DEVIN J., DEWILT P., DIRSON L., DJANNATI-ATAI A., DMYTRIIEV A., DONATH A., DOROSHENKO V., DYKS J., EGBERTS K., EICHHORN F., EMERY G., ERNENWEIN J.-P., ESCHBACH S., FEIJEN K., FEGAN S., FIASSON A., FONTAINE G., FUNK S., FUSSLING M., GABICI S., GALLANT Y.A., GIAVITTO G., GIUNTI L., GLAWION D., GLICENSTEIN J.F., GOTTSCHALL D., GRONDIN M.-H., HAHN J., HAUPT M., HEINZELMANN G., HERMANN G., HINTON J.A., HOFMANN W., HOISCHEN C., HOLCH T.L., HOLLER M., HORBE M., HORNS D., HUBER D., IWASAKI H., JAMROZY M., JANKOWSKY D., JANKOWSKY F., JARDIN-BLICQ A., JOSHI V., JUNG-RICHARDT I., KASTENDIECK M.A., KATARZYNSKI K., KATSURAGAWA M., KATZ U., KHANGULYAN D., KHELIFI B., KLEPSER S., KLUZNIAK W., KOMIN N., KONNO R., KOSACK K., KOSTUNIN D., KRETER M., LAMANNA G., LEMIERE A., LEMOINE-GOUMARD M., LENAIN J.-P., LESER E., LEVY C., LOHSE T., LYPOVA I., MACKEY J., MAJUMDAR J., MALYSHEV D., MALYSHEV D., MARANDON V., MARCHEGIANI P., MARCOWITH A., MARES A., MARTI-DEVESA G., MARX R., MAURIN G., MEINTJES P.J., MODERSKI R., MOHAMED M., MOHRMANN L., MOORE C., MORRIS P., MOULIN E., MULLER J., MURACH T., NAKASHIMA S., NAKASHIMA K., DE NAUROIS M., NDIYAVALA H., NIEDERWANGER F., NIEMIEC J., OAKES L., O'BRIEN P., ODAKA H., OHM S., DE ONA WILHELMI E., OSTROWSKI M., PANTER M., PARSONS R.D., PEYAUD B., PIEL Q., PITA S., POIREAU V., PRIYANA NOEL A., PROKHOROV D.A., PROKOPH H., PUHLHOFER G., PUNCH M., QUIRRENBACH A., RAAB S., RAUTH R., REIMER A., REIMER O., REMY Q., RENAUD M., RIEGER F., RINCHIUSO L., ROMOLI C., ROWELL G., RUDAK B., RUIZ-VELASCO E., SAHAKIAN V., SAILER S., SAITO S., SANCHEZ D.A., SANTANGELO A., SASAKI M., SCALICI M., SCHLICKEISER R., SCHUSSLER F., SCHULZ A., SCHUTTE H.M., SCHWANKE U., SCHWEMMER S., SEGLAR-ARROYO M., SENNIAPPAN M., SEYFFERT A.S., SHAFI N., SHININGAYAMWE K., SIMONI R., SINHA A., SOL H., SPECOVIUS A., SPENCER S., SPIR-JACOB M., STAWARZ L., STEENKAMP R., STEGMANN C., STEPPA C., TAKAHASHI T., TAVERNIER T., TAYLOR A.M., TERRIER R., TIZIANI D., TLUCZYKONT M., TOMANKOVA L., TRICHARD C., TSIROU M., TSUJI N., TUFFS R., UCHIYAMA Y., VAN DER WALT D.J., VAN ELDIK C., VAN RENSBURG C., VAN SOELEN B., VASILEIADIS G., VEH J., VENTER C., VINCENT P., VINK J., VOLK H.J., VUILLAUME T., WADIASINGH Z., WAGNER S.J., WATSON J., WERNER F., WHITE R., WIERZCHOLSKA A., YANG R., YONEDA H., ZACHARIAS M., ZANIN R., ZDZIARSKI A.A., ZECH A., ZORN J., ZYWUCKA N., RODRIGUES X. (The HESS Collaboration)

Abstract (from CDS):

The detection of the first electromagnetic counterpart to the binary neutron star (BNS) merger remnant GW170817 established the connection between short γ-ray bursts and BNS mergers. It also confirmed the forging of heavy elements in the ejecta (a so-called kilonova) via the r-process nucleosynthesis. The appearance of nonthermal radio and X-ray emission, as well as the brightening, which lasted more than 100 days, were somewhat unexpected. Current theoretical models attempt to explain this temporal behavior as either originating from a relativistic off-axis jet or a kilonova-like outflow. In either scenario, there is some ambiguity regarding how much energy is transported in the nonthermal electrons versus the magnetic field of the emission region. Combining the Very Large Array (radio) and Chandra (X-ray) measurements with observations in the GeV-TeV domain can help break this ambiguity, almost independently of the assumed origin of the emission. Here we report for the first time on deep H.E.S.S. observations of GW170817/GRB 170817A between 124 and 272 days after the BNS merger with the full H.E.S.S. array of telescopes, as well as on an updated analysis of the prompt (<5 days) observations with the upgraded H.E.S.S. phase-I telescopes. We discuss implications of the H.E.S.S. measurement for the magnetic field in the context of different source scenarios.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Gamma-ray transient sources - Stellar mergers - Gamma-ray bursts - Gamma-ray astronomy - Ejecta

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026
#notes
1 GRB 080916C gB 07 59 23.24 -56 38 16.8           ~ 386 0
2 GALEX J123205.0-105600 Bz? 12 32 04.9717245480 -10 56 00.722548932         16.421 ~ 186 0
3 NGC 4993 Sy2 13 09 47.6908761600 -23 23 02.314044636   13.34   11.92   ~ 397 0
4 GrW 170817 GWE 13 09 48.0850 -23 22 53.343           ~ 2683 0

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