Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-02-23
Astronomy and Astrophysics
Astrophysics
11 pages, 2 figures, Accepted ApJL
Scientific paper
10.1086/311949
We report on the spectroscopic identification and the long awaited redshift measurement of the heavily obscured, gravitationally lensed radio source PKS 1830-211, which was first observed as a radio Einstein ring. The NE component of the doubly imaged core is identified, in our infrared spectrum covering the wavelength range 1.5-2.5 microns, as an impressively reddened quasar at z=2.507. Our redshift measurement, together with the recently measured time delay (Lovell et al.), means that we are a step closer to determining the Hubble constant from this lens. Converting the time delay into the Hubble constant by using existing models leads to high values for the Hubble constant. Since the lensing galaxy lies very close to the center of the lensed ring, improving the error bars on the Hubble constant will require not only a more precise time delay measurement, but also very precise astrometry of the whole system.
Broadhurst Tom
Courbin Fred
Frye Brenda
Lidman Chris
Meylan George
No associations
LandOfFree
The redshift of the gravitationally lensed radio source PKS1830-211 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The redshift of the gravitationally lensed radio source PKS1830-211, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The redshift of the gravitationally lensed radio source PKS1830-211 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-319344