We use cookies to ensure that we give you the best experience on our website. By continuing to browse this repository, you give consent for essential cookies to be used. You can read more about our Privacy and Cookie Policy.

Durham Research Online
You are in:

A strong-lensing elliptical galaxy in the MaNGA survey.

Smith, Russell J. (2017) 'A strong-lensing elliptical galaxy in the MaNGA survey.', Monthly notices of the Royal Astronomical Society : letters., 464 (1). L46-L50.


I report discovery of a new galaxy-scale gravitational lens system, identified using public data from the MaNGA survey, as part of a systematic search for lensed background line emitters. The lens is SDSS J170124.01+372258.0, a giant elliptical galaxy with velocity dispersion σ = 256 km s−1, at a redshift of zl = 0.122. After modelling and subtracting the target galaxy light, the integral-field data-cube reveals [O II], [O III] and Hβ emission lines corresponding to a source at zs = 0.791, forming an identifiable ring around the galaxy centre. If the ring is formed by a single lensed source, then the Einstein radius is REin ≈ 2.3 arcsec, projecting to ∼5 kpc at the distance of the lens. The total projected lensing mass is MEin = (3.6±0.6)× 1011 M⊙, and the total J-band mass-to-light ratio is 3.0±0.7 solar units. Plausible estimates of the likely dark matter content could reconcile this with a Milky-Way-like initial mass function (for which M/L ≈ 1.5 is expected), but heavier IMFs are by no means excluded with the present data. An alternative interpretation of the system, with a more complex source plane, is also discussed. The discovery of this system bodes well for future lens searches based on MaNGA and other integral-field spectroscopic surveys.

Item Type:Article
Full text:(VoR) Version of Record
Download PDF (Advance online version)
Full text:(AM) Accepted Manuscript
Download PDF
Full text:(VoR) Version of Record
Download PDF (Final published version)
Publisher Web site:
Publisher statement:This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society: Letters ©: 2016 The Author Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Date accepted:31 August 2016
Date deposited:07 September 2016
Date of first online publication:02 September 2016
Date first made open access:No date available

Save or Share this output

Look up in GoogleScholar