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NAM2017
Timetable
Delegates
Registration
Science
Parallel sessions
Plenary talks
Posters
Publishing workshop
Media workshop
Community forum
Special lunches
Hack day
Social
Welcome reception
Conference dinner
Football + BBQ evening
Outreach
Public talk
Outreach day
Media
Hull
Travel
Accommodation
Going out
Childcare
Contacts
Thursday
Abstract
id
Title of Abstract
Morphology, star formation, and environment in the COSMOS field at z~1
Session
Galaxies in Different Environments: From Groups to Clusters
Date Submitted
2017-04-14 14:40:20
Author
Ana Paulino-Afonso
Institution
Lancaster University
Co-Authors
David Sobral (Lancaster University), Behnam Darvish (Caltech)
Summary (maximum 250 words)
One of the key results in the field of galaxy clusters show that there is a close link between the galaxy density and their morphology in the local Universe (see e.g. Dressler et al. 1980). At higher redshifts this picture is unclear as evolved clusters are rarer and the imprint on morphology is less pronounced. With a wealth of imaging data from publicly available surveys and dedicated VIMOS observations of a highly clustered region in the COSMOS field (Darvish et al. 2014) we investigate the links between galaxy morphology, star-formation activity (traced by [OII] and Hd in the VIMOS spectra), and environment at z~1.
We find that there is a break on the average galaxy size, with high density regions having smaller galaxies when compared to the filaments and field regions. We also see signatures for profile changes with density, by observing higher Sérsic indexes (indicative of more elliptical-like galaxies) in the higher density regions. Our results show that there is already some morphological differentiation through local density taking place when the Universe had roughly half of its current age.
Schedule
id
date time
Session Time
09:00 - 10:30
Talk start
10:15
Abstract
Morphology, star formation, and environment in the COSMOS field at z~1
Day
Thursday
Location
Wilberforce LT-1
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