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  • NAM2019
    • Registration
    • Key Dates & Outline Schedule
    • Practical Information
    • Exhibitors
    • Grants & Bursaries
    • Contacts
  • Science
    • Science Programme
    • Parallel Sessions
    • Plenary Talks
    • Community Session
    • Special Lunches
    • Posters
    • Presenter Guidelines
  • Social
    • What's On
    • Welcome Reception
    • RAS Awards Dinner
  • Media
  • Outreach
    • Outreach and Education Day
    • Fringe Event
    • School Visit Day
  • Lancaster
    • Travel
    • Accommodation
    • Childcare
    • Campus Map
    • About Lancaster
    • Code of Conduct

Monday

Schedule

id
date time
PM2
16:30
Abstract
The Feeding Habits of Galaxies
Monday

Abstract details

id
The Feeding Habits of Galaxies
Date Submitted
2019-03-14 16:20:47
Mikkel
Kristensen
University of Hull
Galaxy-Black Hole Co-evolution: Observational and Theoretical Perspectives
Talk
M. Kristensen (University of Hull), K. Pimbblet (University of Hull), S. Penny (University of Portsmouth)
Galaxies are dynamical objects that evolve and mature over time where both internal and external processes can change the composition and structure of them. Low-mass galaxies constitute an unrivalled sample to determine the effect of these processes due to their typically pristine gas, stellar, and structural components.
The hierarchical structure formation theory is often invoked to explain the origin of the galaxies and AGNs we see today, and this work test the early stages of this process. We assemble a sample of 6,615 low-mass galaxies from the NASA Sloan Atlas with AGN characteristics in an attempt to determine their cosmological histories and the importance of environment as an AGN trigger.
We find that the fraction of low-mass galaxies exhibiting AGN activity is comparable to regular galaxies (~2-5%), and that they tend to be in denser environments than non-AGN galaxies. However, using a WHAN diagram to select AGNs rather than BPT shows no environmental differences between active and regular galaxies. We discuss the implications of these findings.

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