2024Natur.634..557A

Query : 2024Natur.634..557A

2024Natur.634..557A - Nature, 634, 557-560 (2024/October-0)

Ultra-high-energy gamma-ray bubble around microquasar V4641 Sgr.

ALFARO R., ALVAREZ C., ARTEAGA-VELAZQUEZ J.C., AVILA ROJAS D., AYALA SOLARES H.A., BABU R., BELMONT-MORENO E., CABALLERO-MORA K.S., CAPISTRAN T., CARRAMINANA A., CASANOVA S., COTTI U., COTZOMI J., COUTINO DE LEON S., DE LA FUENTE E., DEPAOLI D., DI LALLA N., 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., FRAIJA S., GARCIA-GONZALEZ J.A., GARFIAS F., GONZALEZ MUNOZ A., GONZALEZ M.M., GOODMAN J.A., GROETSCH S., HARDING J.P., HERZOG I., HINTON J., HUANG D., HUEYOTL-ZAHUANTITLA F., HUNTEMEYER P., IRIARTE A., JOSHI V., KAUFMANN S., KIEDA D., DE LEON C., LEE J., LEON VARGAS H., LINNEMANN J.T., LONGINOTTI A.L., LUIS-RAYA G., MALONE K., 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., OLIVERA-NIETO L., OMODEI N., OSORIO M., PEREZ ARAUJO Y., PEREZ-PEREZ E.G., RHO C.D., ROSA-GONZALEZ D., RUIZ-VELASCO E., SALAZAR H., SALAZAR-GALLEGOS D., SANDOVAL A., SCHNEIDER M., 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., VARELA E., VILLASENOR L., WANG X., WATSON I.J., WILLOX E., YUN-CARCAMO S. and ZHOU H.

Abstract (from CDS):

Microquasars are laboratories for the study of jets of relativistic particles produced by accretion onto a spinning black hole. Microquasars are near enough to allow detailed imaging of spatial features across the multiwavelength spectrum. The recent extension measurement of the spatial morphology of a microquasar, SS 433, to TeV gamma rays localizes the acceleration of electrons at shocks in the jet far from the black hole . V4641 Sagittarii (V4641 Sgr) is a similar binary system with a black hole and B-type main-sequence companion star and has an orbit period of 2.8 days (refs. ). It stands out for its super-Eddington accretion and for its radio jet, which is one of the fastest superluminal jets in the Milky Way. Previous observations of V4641 Sgr did not report gamma-ray emission . Here we report TeV gamma-ray emission from V4641 Sgr that reveals particle acceleration at similar distances from the black hole as SS 433. Furthermore, the gamma-ray spectrum of V4641 Sgr is among the hardest TeV spectra observed from any known gamma-ray source and is detected above 200 TeV. Gamma rays are produced by particles, either electrons or protons, of higher energies. Because energetic electrons lose energy more quickly the higher their energy, such a spectrum either very strongly constrains the electron-production mechanism or points to the acceleration of high-energy protons. This suggests that large-scale jets from microquasars could be more common than previously expected and that they could be a notable source of galactic cosmic rays .

Abstract Copyright: 2024 The Author(s), under exclusive licence to Springer Nature Limited

Journal keyword(s):

Simbad objects: 11

Full paper

View the references in ADS

Number of rows : 11

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	V* V4722 Sgr	LXB	18 10 44.47	-26 09 01.2	21.5			18.449	~	99	0
2	IGR J18170-2511	CV*	18 17 11	-25 08.5					~	5	0
3	4FGL J1817.7-2517	gam	18 17 46.3	-25 17 17					~	6	0
4	XTE J1818-245	LXB	18 18 24.430	-24 32 17.96					~	43	0
5	IGR J18193-2542	gam	18 19 17	-25 42.2					~	5	0
6	V* V4641 Sgr	HXB	18 19 21.6343259256	-25 24 25.849595952		13.654	13.479	13.139	B9III	530	0
7	4FGL J1821.5-2531	gam	18 21 34.5	-25 31 38					~	6	0
8	4FGL J1822.6-2502	gam	18 22 39.2	-25 02 25					~	6	0
9	AX J1824.5-2451	X	18 24.5	-24 51					~	10	0
10	SS 433	HXB	19 11 49.5647697480	+04 58 57.827127648	16.854	14.643			A7Ib	2253	4
11	SNR G039.7-02.0	SNR	19 12 20	+04 55.0					~	378	1

To bookmark this query, right click on this link: simbad:objects in 2024Natur.634..557A and select 'bookmark this link' or equivalent in the popup menu