2001ApJ...548L.127Y

Query : 2001ApJ...548L.127Y

2001ApJ...548L.127Y - Astrophys. J., 548, L127-L130 (2001/February-3)

Evidence for a source size of less than 2000 AU in quasar 2237+0305.

YONEHARA A.

Abstract (from CDS):

Recently, the OGLE team has reported a clear quasar microlensing signal in Q2237+0305. We have analyzed the microlensing event of ``image C'' by using their finely sampled light curves. From the light-curve fitting, we can unambiguously set the source size of ≲0.98 Einstein ring radius as a conservative limit. This limit corresponds to 2000 AU, if we adopt the Mlens∼0.1 M☉ value obtained by a recent statistical study of the mean mass of the lens object. This is clear evidence for the existence of an accretion disk in the central region of the quasar.

Abstract Copyright: ∼

Journal keyword(s): Accretion, Accretion Disks - Galaxies: Active - Cosmology: Gravitational Lensing - quasars: individuals (Q2237+0305)

Simbad objects: 6

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Number of rows : 6
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 QSO J2240+0321 QSO 22 40 30.234 +03 21 30.63           ~ 705 1
2 Z 378-15 AGN 22 40 30.23447 +03 21 30.6290           ~ 636 0
3 QSO B2237+0305D LeI 22 40 30.28 +03 21 29.3   18.98       ~ 78 0
4 QSO B2237+0305B LeI 22 40 30.30 +03 21 30.5   17.82       ~ 78 0
5 QSO B2237+0305A LeI 22 40 30.34 +03 21 28.8   17.96       ~ 90 0
6 QSO B2237+0305C LeI 22 40 30.38 +03 21 30.0   18.66       ~ 81 0

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