Double dark matter vision: Twice the number of compact-source lenses with narrow-line lensing and the WFC3 grism
| Autor: | Timo Anguita, Adriano Agnello, Veronica Motta, Annika H. G. Peter, G. Brammer, Daniel Gilman, Christopher D. Fassnacht, Dominique Sluse, Leonidas A. Moustakas, Tommaso Treu, Anna Nierenberg, Simon Birrer |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
DWARF GALAXIES Strong [Gravitational lensing] Dark matter FOS: Physical sciences Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Gravitational microlensing EDGE-ON DISC law.invention law SATELLITE GALAXIES Dwarf [Galaxies] EARLY-TYPE GALAXIES INTEGRAL FIELD SPECTROSCOPY Quasars STAR-FORMATION HISTORIES MASS SUBSTRUCTURE Physics Haloes [Galaxies] Astronomy and Astrophysics Quasar BROAD EMISSION-LINES Galaxies Astrophysics - Astrophysics of Galaxies Galaxy Lens (optics) Grism GRAVITATIONAL LENSES Gravitational lens Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) II EMISSION Low Mass Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Nierenberg, A M, Gilman, D, Treu, T, Brammer, G, Birrer, S, Moustakas, L, Agnello, A, Anguita, T, Fassnacht, C D, Motta, F, Peter, A H G & Sluse, D 2020, ' Double dark matter vision : twice the number of compact-source lenses with narrow-line lensing and the WFC3 grism ', Monthly Notices of the Royal Astronomical Society, vol. 492, no. 4, pp. 5314-5335 . https://doi.org/10.1093/mnras/stz3588 |
| DOI: | 10.1093/mnras/stz3588 |
| Popis: | The magnifications of compact-source lenses are extremely sensitive to the presence of low mass dark matter halos along the entire sight line from the source to the observer. Traditionally, the study of dark matter structure in compact-source strong gravitational lenses has been limited to radio-loud systems, as the radio emission is extended and thus unaffected by microlensing which can mimic the signal of dark matter structure. An alternate approach is to measure quasar nuclear-narrow line emission, which is free from microlensing and present in virtually all quasar lenses. In this paper, we double the number of systems which can be used for gravitational lensing analyses by presenting measurements of narrow-line emission from a sample of 8 quadruply imaged quasar lens systems, WGD J0405-3308, HS 0810+2554, RX J0911+0551, SDSS J1330+1810, PS J1606-2333, WFI 2026-4536, WFI 2033-4723 and WGD J2038-4008. We describe our updated grism spectral modelling pipeline, which we use to measure narrow-line fluxes with uncertainties of 2-10\%, presented here. We fit the lensed image positions with smooth mass models and demonstrate that these models fail to produce the observed distribution of image fluxes over the entire sample of lenses. Furthermore, typical deviations are larger than those expected from macromodel uncertainties. This discrepancy indicates the presence of perturbations caused by small-scale dark matter structure. The interpretation of this result in terms of dark matter models is presented in a companion paper. Accepted for publication in MNRAS |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|