2237 + 0305 - A new and unusual gravitational lens

Huchra, J. P.; Gorenstein, M. V.; Kent, S.; Shapiro, I. I.; Smith, Graham P.; Horine, E.; Perley, R. A.

doi:10.1086/113777

Cited by 298 publications

(243 citation statements)

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“…QSO 2237]0305 (z \ 1.695 ; Huchra et al 1985), referred to hereafter as "" the Einstein Cross,ÏÏ is the Ðrst gravitationally lensed QSO with conÐrmed variations due to lensing by the stars in the lens galaxy (z \ 0.0395), referred to as "" microlensing ÏÏ (Irwin et al 1989). Optical variations of^0.5 mag due to microlensing are observed at least once per year (Racine 1992), which implies that the optical emission region is smaller than an Einstein radius, R E \ 1.1 h~1@2 cm, where M is the mass of the lensing ] 1017M1@2 star in solar masses and km s~1 Mpc~1).…”

Section: Introductionmentioning

confidence: 99%

Keck Mid‐Infrared Imaging of QSO 2237+0305

Agol

Jones

Blaes

2000

ApJ

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Using the Long Wavelength Spectrometer on Keck, we have imaged the gravitationally lensed radioquiet quasi-stellar object QSO 2237]0305 at 8.9 and 11.7 km for the Ðrst time. The mid-IR Ñux ratios are inconsistent with the optical Ñux ratios but agree with the radio Ñux ratios and with some published gravitational lens models. These Ñux ratios indicate that the IR emission is not a †ected by microlensing, which rules out the synchrotron emission model. The IR emission is likely produced by hot dust extended on a length scale of more than 0.03 pc. The spectral energy distribution further implies a narrow range of dust temperatures, suggesting that the dust may be located in a shell extending between D1 and 3 pc from the nucleus and intercepting about half of the QSO luminosity.

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Section: Introductionmentioning

confidence: 99%

Keck Mid‐Infrared Imaging of QSO 2237+0305

Agol

Jones

Blaes

2000

ApJ

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“…The galaxy causing the lensing was soon directly recorded along with a third image (Stockton, 1980). With the Advanced Camera for Surveys (ACS) aboard the Hubble Space Telescope, the Sloan Lens ACS (SLACS) Survey (Bolton et al, 2008) -12 m. An interesting gravitational lens system discovered in 1985 (Huchra et al, 1985) shows how it can add support to the theory of general relativity. It has been resolved by the Hubble Space Telescope to be four quasar images with z = 1.695 surrounding a 15 magnitude spiral galaxy 2237 + 0305 with z = 0.039 4.…”

Section: Gravitational Lensingmentioning

confidence: 99%

Recent astronomical tests of general relativity

Treschman¹

2015

Int. J. Phys. Sci.

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“…We have used the CIRPASS IFU on Gemini to measure the gravitational lensing on different size scale of an Einstein cross (the 4-image quasar Q2237+0305, Huchra et al 1985, Mediavilla et al 1998. In a project lead by Ben Metcalf, we simultaneously obtain spectroscopy of the broad line Hβ (λ rest = 4861Å) and the forbidden narrow line doublet [OIII] 4959,5007Å from the z = 1.69 quasar, lensed by a foreground galaxy at z = 0.03.…”

Section: Spectroscopic Gravitational Lensing and Limits On The Dark Mmentioning

confidence: 99%