Photo of Stephen Hamer
  • 3 WEST 3.17A

20102019

Research output per year

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Personal profile

Research interests

I study the processing of gas within galaxy clusters, some of the largest gravitationally bound strucutres in the Universe.  These structures are permiated with hot and rapidly cooling gas and represent interesting and unique labratories in which to study galaxy evolution processes.

I use multi-wavelength observations taken by a multitude of different telescopes to study how the hot gas cools, condenses onto the central galaxy and its supermassive black hole, drives star formation and outbursts from AGN which ultimately disrupt the the gas, slowing its cooling in a perpetual feedback cycle. 

To study this wide array of processes I use spectroscopic observations to constrain the kinematics of the gas to understand how it is moving.  By studying the energetics and physical properties of the gas I investigate the processes responcible for illuminating it and moving it about within the cluster.  Finally by looking at chemical tracers within the gas I can constrain where it has origonated and how it has been processed by the system.

Combining all of this together accross multiple gas phases is nessasery to develope a full understanding of the physical processes governing galaxy evolution within the cluster core.  Lessons learned within these environments can then be applied to the larger galaxy population to help us understand why our Universe is the way it is.

Education/Academic qualification

Astrophysics, Doctor of Philosophy, Durham University

1 Oct 200830 Sep 2012

Astronomy, Space Science and Astrophysics, Master of Physics

1 Oct 200430 Jun 2008

External positions

Research Associate at the Institute for Astronomy, University of Cambridge

1 Oct 201730 Sep 2018

Research Associate, CRAL - Observatoire de Lyon

5 Oct 201530 Sep 2017

Research Associate, Observatoire de Paris

8 Nov 201230 Sep 2015

Keywords

  • QB Astronomy

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Research Output

A BCG with Offset Cooling: Is the AGN Feedback Cycle Broken in A2495?

Pasini, T., Gitti, M., Brighenti, F., Temi, P., Amblard, A., Hamer, S. L., Ettori, S., O'Sullivan, E. & Gastaldello, F., 6 Nov 2019, In : Astrophysical Journal. 885, 2, 111.

Research output: Contribution to journalArticle

Open Access
File
6 Downloads (Pure)

Constraining cold accretion onto supermassive black holes: molecular gas in the cores of eight brightest cluster galaxies revealed by joint CO and CN absorption

Rose, T., Edge, A. C., Combes, F., Gaspari, M., Hamer, S., Nesvadba, N., Peck, A. B., Sarazin, C., Tremblay, G. R., Baum, S. A., Bremer, M. N., McNamara, B. R., O'Dea, C., Oonk, J. B. R., Russell, H., Salomé, P., Donahue, M., Fabian, A. C., Ferland, G., Mittal, R. & 1 others, Vantyghem, A., 31 Oct 2019, In : Monthly Notices of the Royal Astronomical Society. 489, 1, p. 349-365 17 p.

Research output: Contribution to journalArticle

Open Access
File
1 Citation (Scopus)
8 Downloads (Pure)

Dense gas formation and destruction in a simulated Perseus-like galaxy cluster with spin-driven black hole feedback

Beckmann, R. S., Dubois, Y., Guillard, P., Salome, P., Olivares, V., Polles, F., Cadiou, C., Combes, F., Hamer, S., Lehnert, M. D. & Forets, G. P. D., 1 Nov 2019, In : A&A. 631, A60.

Research output: Contribution to journalArticle

Open Access

Discovery of a diffuse optical line emitting halo in the core of the Centaurus cluster of galaxies: Line emission outside the protection of the filaments

Hamer, S. L., Fabian, A. C., Russell, H. R., Salomé, P., Combes, F., Olivares, V., Polles, F. L., Edge, A. C. & Beckmann, R. S., 26 Mar 2019, In : Monthly Notices of the Royal Astronomical Society. 483, 4, p. 4984-4998 15 p.

Research output: Contribution to journalArticle

Open Access
File
2 Citations (Scopus)
9 Downloads (Pure)

The core of the massive cluster merger MACS J0417.5-1154 as seen by VLT/MUSE

Jauzac, M., Mahler, G., Edge, A. C., Sharon, K., Gillman, S., Ebeling, H., Harvey, D., Richard, J., Hamer, S. L., Fumagalli, M., Swinbank, A. M., Kneib, J-P., Massey, R. & Salome, P., 31 Mar 2019, In : Monthly Notices of the Royal Astronomical Society. 483, 3, p. 3082-3097 16 p.

Research output: Contribution to journalArticle

Open Access
File
3 Citations (Scopus)
12 Downloads (Pure)