The nature of the 8 o'clock arc using Near-IR IFU spectroscopy with SINFONI

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Shirazi, M (Author) Other; Vegetti, S (Author) Other; Nesvadba, N (Author) Other; J. Brinchmann (Author) Other; Allam, S (Author) Other; Tucker, D (Author) Other

Journal

Title: Proceedings of the International Astronomical Union

Vol. 8

Pages: 63-63

ISSN: 1743-9213

Publisher: Cambridge University Press

Other information

Authenticus ID: P-00R-ZTW

DOI: 10.1017/s174392131300433x

Abstract (EN): <jats:p>We present an analysis of the lensed Lyman Break Galaxy (LBG), the 8 o'clock arc, at redshift 2.735. We reduced Near-IR IFU data from SINFONI on VLT covering ¿= 2900 <jats:italic>Å</jats:italic> to 6500 <jats:italic>Å</jats:italic> in the rest-frame. From this we recovered the Hß map and the spatially-resolved Hß profile which are shown in the right plot in Fig. 1. We can see that Hß shows different profiles at different spatial pixels and it is composed of multiple components. To study the de-lensed morphology of the galaxy we make use of existing B & H band imaging from the HST. Based on this we constructed a rigorous lens model for the system using the Bayesian grid based lens modeling technique presented by Vegetti & Koopmans (2009, MNRAS, 392, 945). In order to obtain a robust lens model, we first considered the high resolution B band HST image (rest-frame UV, left plot in Fig. 1) and then used this modeling to reconstruct the Hß line map of the galaxy. We then present the de-lensed Hß line map, velocity and velocity dispersion maps of this LBG galaxy.</jats:p>

Language: English

Type (Professor's evaluation): Scientific