Integral-field spectrophotometry of the quadruple QSO HE 0435-1223: Evidence for microlensing
نویسندگان
چکیده
منابع مشابه
Integral-field spectrophotometry of the quadruple QSO HE 0435−1223: Evidence for microlensing
We present the first spatially resolved spectroscopic observations of the recently discovered quadruple QSO and gravitational lens HE 0435−1223. Using the Potsdam Multi-Aperture Spectrophotometer (PMAS), we show that all four QSO components have very similar but not identical spectra. In particular, the spectral slopes of components A, B, and D are indistinguishable, implying that extinction du...
متن کاملThe Lens Redshift and Group Environment for He 0435 - 1223
The redshift of the galaxy lensing HE 0435−1223 is 0.4546 ± 0.0002, based on observations obtained with the Low Dispersion Survey Spectrograph 2 (LDSS2) on the Magellan Consortium’s 6.5 m Clay telescope. Hubble Space Telescope/ACS observations of the system also reveal a spiral-rich group of 10 galaxies within 40 of the elliptical lensing galaxy. The redshifts for two of these galaxies were mea...
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Context. Gravitationally lensed quasars constitute an independent tool to derive the Hubble constant through the time-delays of their different images; they offer as well the opportunity to study the mass distribution and interstellar medium of their lensing galaxies and, through microlensing due to stars in their lensing galaxy, they also allow one to study details of the emitting source. Aims...
متن کامل0 v 1 2 A ug 2 00 5 The Time Delays of Gravitational Lens HE 0435 – 1223 : An Early - Type Galaxy With a Rising Rotation Curve
We present Hubble Space Telescope images and 2 years of optical photometry of the quadruple quasar HE 0435–1223. The time delays between the intrinsic quasar variations are ∆t AD = −14.37
متن کاملOn the Universality of Microlensing in Quadruple Gravitational Lenses
It is well known that multiply imaged quasars are likely to be aaected by microlensing. Quadruply imaged systems are especially useful laboratories for studying microlensing because their macrolens models are relatively well constrained. We begin with analytical results for a simple family of galaxy models. These results can be used to estimate the magniications and time delays for the quadrupl...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2003
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20031004