Bibcode
Vives-Arias, H.; Jiménez-Vicente, J.; Muñoz, J. A.; Mediavilla, E.
Referencia bibliográfica
Highlights on Spanish Astrophysics IX, Proceedings of the XII Scientific Meeting of the Spanish Astronomical Society held on July 18-22, 2016, in Bilbao, Spain, ISBN 978-84-606-8760-3. S. Arribas, A. Alonso-Herrero, F. Figueras, C. Hernández-Monteagudo, A. Sánchez-Lavega, S. Pérez-Hoyos (eds.), 2017 , p. 297-297
Fecha de publicación:
3
2017
Número de citas
0
Número de citas referidas
0
Descripción
We use 8 gravitational lens systems with quadruply imaged quasars and
their observed flux ratio anomalies obtained using data in mid-infrared,
radio or spectral narrow lines as a baseline, to estimate the amount of
substructure in the dark matter halo of lens galaxies. We assume that
the smooth gravitational potential of the galaxies is well modeled by a
Singular Isothermal Ellipsoid (SIE) plus external shear (γ) and an
additional Singular Isothermal Sphere (SIS) in some cases, and that the
cause of the flux ratio anomalies is dark matter subhalos described by
pseudo-Jaffe density profiles. Our Bayesian estimate for the Einstein
radius of the subhalos is b = 0.0003^{+0.0005}_{-0.0002} arcsec, and
their abundance (as a fraction of the total surface density of the lens
galaxy at the image positions) is α
=Ê0.075^{+0.030}_{-0.021}.