2009ApJ...698L.142T

Query : 2009ApJ...698L.142T

2009ApJ...698L.142T - Astrophys. J., 698, L142-L146 (2009/June-3)

Detection of gamma-ray emission from the eta-Carinae region.

TAVANI M., SABATINI S., PIAN E., BULGARELLI A., CARAVEO P., VIOTTI R.F., CORCORAN M.F., GIULIANI A., PITTORI C., VERRECCHIA F., VERCELLONE S., MEREGHETTI S., ARGAN A., BARBIELLINI G., BOFFELLI F., CATTANEO P.W., CHEN A.W., COCCO V., D'AMMANDO F., COSTA E., DE PARIS G., DEL MONTE E., DI COCCO G., DONNARUMMA I., EVANGELISTA Y., FERRARI A., FEROCI M., FIORINI M., FROYSLAND T., FUSCHINO F., GALLI M., GIANOTTI F., LABANTI C., LAPSHOV I., LAZZAROTTO F., LIPARI P., LONGO F., MARISALDI M., MASTROPIETRO M., MORELLI E., MORETTI E., MORSELLI A., PACCIANI L., PELLIZZONI A., PEROTTI F., PIANO G., PICOZZA P., PILIA M., PORROVECCHIO G., PUCELLA G., PREST M., RAPISARDA M., RAPPOLDI A., RUBINI A., SOFFITTA P., TRIFOGLIO M., TROIS A., VALLAZZA E., VITTORINI V., ZAMBRA A., ZANELLO D., SANTOLAMAZZA P., GIOMMI P., COLAFRANCESCO S., ANTONELLI L.A. and SALOTTI L.

Abstract (from CDS):

We present the results of extensive observations by the gamma-ray AGILE satellite of the Galactic region hosting the Carina nebula and the remarkable colliding wind binary Eta Carinae (η Car) during the period 2007 July-2009 January. We detect a gamma-ray source (1AGL J1043-5931) consistent with the position of η Car. If 1AGL J1043-5931 is associated with the Car system, our data provide the long sought first detection above 100 MeV of a colliding wind binary. The average gamma-ray flux above 100 MeV and integrated over the preperiastron period 2007 July-2008 October is Fγ= (37±5) x10–8 ph/cm2/s corresponding to an average gamma-ray luminosity of Lγ= 3.4x1034 erg/s for a distance of 2.3 kpc. We also report a two-day gamma-ray flaring episode of 1AGL J1043-5931 on 2008 October 11-13 possibly related to a transient acceleration and radiation episode of the strongly variable shock in the system.

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Journal keyword(s): gamma rays: observations - stars: individual: Eta Carinae - stars: winds, outflows - X-rays: binaries

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 1AGL J1043-5931 gam 10 43.0 -59 31           ~ 5 0
2 HD 93162 WR* 10 44 10.3890266112 -59 43 11.106500520 7.90 8.55 8.80 8.66   O2.5If*/WN6+OB 360 0
3 2MASS J10445192-6025115 Sy2 10 44 51.925 -60 25 11.52           ~ 24 0
4 NGC 3372 HII 10 45 02.23 -59 41 59.8           ~ 1016 2
5 * eta Car Em* 10 45 03.545808 -59 41 03.95124 6.37 7.03 6.48 6.123 4.41 LBV 2448 0
6 AGL J1046-5832 gam 10 46.0 -58 32           ~ 1 0
7 PSR B1046-58 Psr 10 48 13.0500 -58 32 06.200           ~ 269 0
8 2E 2336 HXB 10 50 08.93 -59 53 19.9           Be 408 0
9 NAME Carina Region reg ~ ~           ~ 186 0

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