Bibcode
Vives-Arias, H.; Muñoz, J. A.; Mediavilla, E.; Jiménez-Vicente, J.
Referencia bibliográfica
Highlights of Spanish Astrophysics VIII, Proceedings of the XI Scientific Meeting of the Spanish Astronomical Society held on September 8-12, 2014, in Teruel, Spain, ISBN 978-84-606-8760-3. A. J. Cenarro, F. Figueras, C. Hernández-Monteagudo, J. Trujillo Bueno, and L. Valdivielso (eds.), p. 383-383
Advertised on:
5
2015
Número de citas
0
Número de citas referidas
0
Descripción
We present mid-IR observations taken with CanariCam at Gran Telescopio
Canarias of the quadruply lensed quasar QSO2237+0305. We have obtained
flux ratios between the four images that, unlike optical, near-IR and,
to a lesser extent, radio emission, are unaffected by the ISM
(extinction/scattering) or stellar microlensing. We are using these flux
ratios to obtain a mass model for the lensing galaxy and test for the
presence of CDM substructure. We also compare these ``true" ratios to
the (stellar) microlensed flux ratios observed in the optical/near-IR to
constrain the structure of the quasar accretion disk and the fraction of
the lens mass in stars as compared to dark matter.