VLBI imaging of the gravitational lens MG J 0414 + 0534
نویسندگان
چکیده
We observed the quadruple gravitationally lensed image of MG J0414+0534 on 23 November 1997 with a global VLBI array at 8. 4 GHz. We report wide-field imaging results of its four components at submilliarcsec-ond resolution , displaying complex core-like and jet-like extended structures. A simple model combining a singular isothermal ellipsoid to represent the main lens galaxy , external shear , and a singular isothermal sphere to represent an additional , nearby object accounts well for the core positions and flux densities of the VLBI images. This model predicts delays between the different lensed images of several weeks .
منابع مشابه
Multifrequency Radio Observations of the Gravitational Lens System Mg 0414 + 0534
The four-image gravitational lens system MG 0414+0534 was observed with the GHz images reveal structure in the components which is consistent with that seen at other wavelengths. There was no detection of other extended emission, nor were there detections of the lensing galaxy or the " component x " seen in optical images. Detections of polarized emission show that the fractional polarized inte...
متن کامل/ 98 09 06 3 v 1 5 S ep 1 99 8 Redshifts of the Gravitational Lenses MG 0414 + 0534 and MG 0751 + 2716
We report redshifts in two gravitational lens systems, MG 0414+0534 and MG 0751+2716. The lens galaxy in MG 0414+0534 lies at zl = 0.9584± 0.0002. The luminosity and extreme red color of the lens are then typical of a passively evolving, early-type, ∼ 2L∗ galaxy. The galaxy cannot have a significant global mean extinction without being anomalously luminous. The lens galaxy in MG 0751+2716 has a...
متن کاملar X iv : a st ro - p h / 97 08 07 9 v 1 8 A ug 1 99 7 15 GHz Monitoring of the Gravitational Lens MG 0414 + 0534
We report the results of monitoring the four images of the gravitational lens MG 0414+0534 at 15GHz. In 35 VLA maps spanning 180 days, we measure root-mean-square variations in the image light curves of ∼3.5% mostly due to variations in the flux density calibration. The flux ratios, which are independent of flux density calibration variations, show root-mean-square variability of 1–3%. Extensiv...
متن کامل15 GHz Monitoring of the Gravitational Lens MG 0414 + 0534
We report the results of monitoring the four images of the gravitational lens MG 0414+0534 at 15 GHz. In 35 VLA maps spanning 180 days, we measure root-mean-square variations in the image light curves of ∼3.5% mostly due to variations in the flux density calibration. The flux ratios, which are independent of flux density calibration variations, show root-mean-square variability of 1–3%. Extensi...
متن کاملVlbi Imaging of the Gravitational Lenses
We present wide-field images of the quadruple gravitational lenses B1422+231 and MGJ0414+0534 obtained from global Very Long Baseline Interferometry (VLBI) observations at 8.4GHz on 23 November 1997. We present also a lens model for MGJ0414+0534, which reproduces the core positions and flux densities of the VLBI images, combining a singular isothermal ellipsoid with external shear, and a singul...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2000