High resolution reddening map in the direction of the stellar system Terzan 5

Abstract

We have used optical images acquired with the Hubble Space Telescope to construct the first high-resolution extinction map in the direction of Terzan 5, a peculiar stellar system in the inner bulge of our Galaxy. The map has a spatial resolution of 8" X 8", over a total FoV of 200" X 200". The absorption clouds show a patchy structure on a typical scale of 20" and extinction variations as large as delta E(B-V) = 0.67 mag, especially in the direction of the center of the system. These correspond to an absolute color excess ranging from E(B-V)=2.15 mag, up to 2.82 mag. After the correction for differential reddening, two distinct red giant branches become clearly visible in the color magnitude diagram of Terzan 5 and they well correspond to the two sub-populations with different iron abundances recently discovered in this system.

Published by the Astrophysical Journal Letters, Volume 755, Issue 2, article id. L32 (2012). 15 pages, 5 figures

References in corpus (2)

• The ACS Nearby Galaxy Survey Treasury IX. Constraining asymptotic giant branch evolution with old metal-poor galaxies
• Near-IR properties of 24 Globular Clusters in the Galactic Bulge

Cited by in corpus (19)

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• The age of the young bulge-like population in the stellar system Terzan5: linking the Galactic bulge to the high-z Universe
• Near-Infrared Photometry of Globular Clusters Towards the Galactic Bulge: Observations and Photometric Metallicity Indicators
• The origin of the spurious iron spread in the globular cluster NGC 3201
• A panchromatic view of the bulge globular cluster NGC 6569
• A Census of X-ray Millisecond Pulsars in Globular Clusters
• Digging for relics of the past: the ancient and obscured bulge globular cluster NGC6256
• Exploring the Chemical Composition and Double Horizontal Branch of the Bulge Globular Cluster NGC 6569
• The Optical Counterpart to the Accreting Millisecond X-ray Pulsar SAX J1748.9-2021 in the Globular Cluster NGC 6440
• High-resolution extinction map in the direction of the strongly obscured bulge fossil fragment Liller 1
• Chemical and kinematical properties of Galactic bulge stars surrounding the stellar system Terzan 5
• The near-IR counterpart of IGR J17480-2446 in Terzan 5
• The Bulge Cluster Origin (BulCO) survey at the ESO-VLT: probing the early history of the Milky Way assembling. Design and first results in Liller1
• On the manifest link between Terzan 5 and the Galactic bulge
• The multi-age stellar populations of Terzan 5 as revealed by JWST
• Digging deeper into the dense Galactic globular cluster Terzan 5 with Electron-Multiplying CCDs. Variable star detection and new discoveries
• A deep Chandra study verifies diffuse non-thermal X-ray emission from the globular cluster Terzan 5