English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The CXOCY J220132.8-320144 system consists of an edge-on spiral galaxylensing a background quasar into two bright images. Previous efforts toconstrain the mass distribution in the galaxy have suggested that at least oneadditional image must be present (Castander et al. 2006). These extra imagesmay be hidden behind the disk which features a prominent dust lane. We presentand analyze Hubble Space Telescope (HST) observations of the system. We do notdetect any extra images, but the observations further narrow the observableparameters of the lens system. We explore a range of models to describe themass distribution in the system and find that a variety of acceptable modelfits exist. All plausible models require 2 magnitudes of dust extinction inorder to obscure extra images from detection, and some models may require anoffset between the center of the galaxy and the center of the dark matter haloof 1 kiloparsec. Currently unobserved images will be detectable by future JamesWebb Space Telescope (JWST) observations and will provide strict constraints onthe fraction of mass in the disk.

Missing Lensed Images and the Galaxy Disk Mass in CXOCY J220132.8-320144