2019MNRAS.484.2876M

Query : 2019MNRAS.484.2876M

2019MNRAS.484.2876M - Mon. Not. R. Astron. Soc., 484, 2876-2885 (2019/April-1)

Deep observations of the globular cluster M15 with the MAGIC telescopes.

MAGIC COLLABORATION, ACCIARI V.A., ANSOLDI S., ANTONELLI L.A., ARBET ENGELS A., BAACK D., BABIC A., BANERJEE B., BARRES DE ALMEIDA U., BARRIO J.A., BECERRA GONZALEZ J., BEDNAREK W., BERNARDINI E., BERTI A., BESENRIEDER J., BHATTACHARYYA W., BIGONGIARI C., BILAND A., BLANCH O., BONNOLI G., BUSETTO G., CAROSI R., CERIBELLA G., CIKOTA S., COLAK S.M., COLIN P., COLOMBO E., CONTRERAS J.L., CORTINA J., COVINO S., D'ELIA V., DA VELA P., DAZZI F., DE ANGELIS A., DE LOTTO B., DELFINO M., DELGADO J., DI PIERRO F., DO SOUTO ESPINERA E., DOMINGUEZ A., DOMINIS PRESTER D., DORNER D., DORO M., EINECKE S., ELSAESSER D., FALLAH RAMAZANI V., FATTORINI A., FERNANDEZ-BARRAL A., FERRARA G., FIDALGO D., FOFFANO L., FONSECA M.V., FONT L., FRUCK C., GALINDO D., GALLOZZI S., GARCIA LOPEZ R.J., GARCZARCZYK M., GASPARYAN S., GAUG M., GIAMMARIA P., GODINOVIC N., GREEN D., GUBERMAN D., HADASCH D., HAHN A., HERRERA J., HOANG J., HRUPEC D., INOUE S., ISHIO K., IWAMURA Y., KUBO H., KUSHIDA J., KUVEZDIC D., LAMASTRA A., LELAS D., LEONE F., LINDFORS E., LOMBARDI S., LONGO F., LOPEZ M., LOPEZ-ORAMAS A., MACHADO DE OLIVEIRA FRAGA B., MAGGIO C., MAJUMDAR P., MAKARIEV M., MALLAMACI M., MANEVA G., MANGANARO M., MANNHEIM K., MARASCHI L., MARIOTTI M., MARTINEZ M., MASUDA S., MAZIN D., MINEV M., MIRANDA J.M., MIRZOYAN R., MOLINA E., MORALEJO A., MORENO V., MORETTI E., MUNAR-ADROVER P., NEUSTROEV V., NIEDZWIECKI A., NIEVAS ROSILLO M., NIGRO C., NILSSON K., NINCI D., NISHIJIMA K., NODA K., NOGUES L., NOTHE M., PAIANO S., PALACIO J., PANEQUE D., PAOLETTI R., PAREDES J.M., PEDALETTI G., PENIL P., PERESANO M., PERSIC M., PRADA MORONI P.G., PRANDINI E., PULJAK I., GARCIA J.R., RHODE W., RIBO M., RICO J., RIGHI C., RUGLIANCICH A., SAHA L., SAHAKYAN N., SAITO T., SATALECKA K., SCHWEIZER T., SITAREK J., SNIDARIC I., SOBCZYNSKA D., SOMERO A., STAMERRA A., STRZYS M., SURIC T., TAVECCHIO F., TEMNIKOV P., TERZIC T., TESHIMA M., TORRES-ALBA N., TSUJIMOTO S., VAN SCHERPENBERG J., VANZO G., VAZQUEZ ACOSTA M., VOVK I., WILL M. and ZARIC D.

Abstract (from CDS):

A population of globular clusters (GCs) has been recently established by the Fermi-LAT telescope as a new class of GeV γ-ray sources. Leptons accelerated to TeV energies, in the inner magnetospheres of MSPs or in their wind regions, should produce γ-rays through the inverse Compton scattering in the dense radiation field from the huge population of stars. We have conducted deep observations of the GC M15 with the MAGIC telescopes and used 165 h in order to search for γ-ray emission. A strong upper limit on the TeV γ-ray flux < 3.2×10–13 cm–2 s–1 above 300 GeV (< 0.26 per cent of the Crab nebula flux) has been obtained. We interpret this limit as a constraint on the efficiency of the acceleration of leptons in the magnetospheres of the MSPs. We constrain the injection rate of relativistic leptons, ηe, from the MSPs magnetospheres and their surrounding. We conclude that ηe must be lower than expected from the modelling of high-energy processes in MSP inner magnetospheres. For leptons accelerated with the power-law spectrum in the MSP wind regions, ηe is constrained to be much lower than derived for the wind regions around classical pulsars. These constraints are valid for the expected range of magnetic field strengths within the GC and for the range of likely energies of leptons injected from the inner magnetospheres, provided that the leptons are not removed from the GC very efficiently due to advection process. We discuss consequences of these constraints for the models of radiation processes around millisecond pulsars.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): radiation mechanisms: non-thermal - pulsars: general - globular clusters: general - globular clusters: individual: M15 - gamma-rays: stars

Simbad objects: 15

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Number of rows : 15
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 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 PSR J0437-47 Psr 04 37 15.7994581776 -47 15 08.544351636           DC 1032 0
3 M 1 SNR 05 34 31.8 +22 01 03           ~ 6516 1
4 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5476 0
5 NAME Vela Pulsar Psr 08 35 20.65525 -45 10 35.1545     15.10     ~ 2446 1
6 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1540 0
7 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
8 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 2095 0
9 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2291 0
10 Cl Terzan 5 Cl* 17 48 05.00 -24 46 48.0           ~ 948 1
11 PSR J1820-30A Psr 18 23 40.4842 -30 21 39.920           ~ 168 1
12 NGC 6624 GlC 18 23 40.51 -30 21 39.7           ~ 939 1
13 PSR J1824-2452A Psr 18 24 32.009 -24 52 11.10           ~ 529 2
14 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 821 0
15 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0

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