Redshifts of the Gravitational Lenses B1422+231 and PG 1115+080
نویسندگان
چکیده
منابع مشابه
Redshifts of the Gravitational Lenses B 1422 + 231 and PG 1115 + 080 1
B1422+231 and PG1115+080 are gravitational lens systems producing quadruple QSO images where there is real promise that time delays can constrain the Hubble constant. In addition, the lensing galaxies are both part of groups which can play an important role in modelling the lens potential. This article reports redshifts for the lensing galaxies and three neighboring galaxies in each of the two ...
متن کاملRedshifts of the Gravitational Lenses B1422+231 and PG1115+080
B1422+231 and PG1115+080 are gravitational lens systems producing quadruple QSO images where there is real promise that time delays can constrain the Hubble constant. In addition, the lensing galaxies are both part of groups which can play an important role in modelling the lens potential. This article reports redshifts for the lensing galaxies and three neighboring galaxies in each of the two ...
متن کاملKeck Spectroscopy of the Gravitational Lens System PG 1115+080: Redshifts of the Lensing Galaxies
The quadruple system PG 1115+080 is the second gravitational lens with a reported measurement of the Hubble constant. In addition to the primary lens, three nearby galaxies are believed to contribute significantly to the lensing potential. In this letter we report accurate redshifts for all four galaxies and show that they belong to a single group at zd = 0.311. This group has very similar prop...
متن کاملRedshifts of the Gravitational Lenses MG 1131 + 0456 and B 1938 + 666 1
The redshifts of the gravitational lens galaxies in MG 1131+0456 and B 1938+666 are 0.844 and 0.878 respectively. Both are early-type galaxies lying at the redshifts predicted by assuming that they are early-type galaxies with old stellar populations lying on the fundamental plane. We also find evidence for a foreground group of galaxies at z = 0.343 near MG 1131+0456. The source redshifts are ...
متن کاملGravitational Lenses
Gravitational lenses are becoming a precious mean of probing the matter distribution in the Universe. From the search of matter in the Galactic halo to the study of the large-scale structures of the Universe, the gravitational lens effects offer a unique alternative to light surveys and are now widely used. This evolution is due in particular to the use of new observation devices, such as the w...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 1998
ISSN: 0004-6256
DOI: 10.1086/300170