Detection of an H$alpha$ Emission Line on a Quasar, RX J1759.4$+$6638, at Z = 4.3 with AKARI

[摘要] WereportonthedetectionofanH$$alpha$$emissionlineinthelow-resolutionspectrumofaquasar,RXJ1759.4$$+$$6638,ataredshiftof4.3withtheInfraredCamera(IRC)onboardAKARI.ThisisthefirstspectroscopicdetectionofanH$$alpha$$emissionlineinaquasarbeyond$$z=$$4.Theoverallspectralenergydistribution(SED)ofRXJ1759.4$$+$$6638inthenear-andmid-infraredwavelengthsagreeswithamedianSEDofthenearbyquasars;also,thefluxratioof$$F$$(Ly$$alpha$$)$$/$$$$F$$(H$$alpha$$)isconsistentwiththoseofpreviousreportsforlower-redshiftquasars.

[学科分类] 天文学(综合)

[关键词] "quasars: emission lines";"quasars: individual (RX J1759.4+6638)";"infrared: spectroscopy"