News

New Postdoc: KwangHo Park

2 Sep 2014 John Wise Leave a comment

KwangHo Park has arrived in the CRA this week as a new TCAN postdoc, and his primary mentor will be Prof. Tamara Bogdanovic. He works on radiation hydrodynamics as applied to intermediate mass holes, feedback by accretion onto black holes, and black hole growth in the early Universe. He previously held … Continue Reading ››

News

Quoted in a New Scientist Article

22 Aug 2014 John Wise Leave a comment

I was interviewed by New Scientist concerning the discovery of a peculiar metal-poor star that might have been directly enriched by some of the first stars in the Universe. The quote ended up being the skeptic point of view, ending the article. The author actually captured my feelings about this work well. The … Continue Reading ››

News

New Paper: Pre-reionization Galaxy Scaling Relations

13 Aug 2014 John Wise Leave a comment

Today, we have submitted a new paper (arXiv) to the Astrophysical Journal on the scaling relations of galaxies that form during the first 300 million years of the universe, just when reionization is beginning. It is important to quantify the global properties of these early galaxies with respect to cosmological structure simulations in order … Continue Reading ››

Notes

Lyman Continuum Leakage and Reionization Conference

13 Aug 2014 John Wise Leave a comment

Conference (website) at Stockholm University

(Day 1) Wednesday, 13 August 2014

Mellema – Introduction

Photon Underproduction Crisis (Kollmeier+ 2014)
Counting photons: the SF efficiency and UV escape fraction are degenerate, and functions of halo mass and time.
Topology of ionized regions from 21-cm can indicate which sources are responsible for reionization.

Gnedin – Cosmic Reionization on Computers (CROC)

Star formation and feedback … Continue Reading ››

News

New Paper: Massive Black Hole Seed Formation

23 Jul 2014 John Wise Leave a comment

We have submitted a new paper to The Astrophysical Journal on the formation of massive black holes (BHs). See this link for movies. The first massive BHs form in pre-galactic clouds that could be the seeds of supermassive BHs observed when the Universe was only 1 billion years old. These massive BHs could be 10,000 … Continue Reading ››

News

“Birth of a Galaxy III” Press Release

7 Jul 2014 John Wise Leave a comment

Today, our article "Birth of a Galaxy. III. Propelling reionization with the faintest galaxies" has been published by MNRAS! There are a couple of press releases [GT, MNRAS] that accompany the article for everyone to read. Update (25 Jul 2014): Here are the articles where our work has been featured over the past … Continue Reading ››

News

New Postdoc: Ayçin Aykutalp

28 Jun 2014 John Wise Leave a comment

Ayçin Aykutalp joins the CRA this week as a TCAN postdoc. She is broadly interested in the formation and growth of supermassive black holes, and recently she has worked on their initial growth from massive seeds. In particular, she is currently studying the effects of UV and X-ray radiative … Continue Reading ››

Notes

Physics of First Star and Galaxy Formation Conference

10 Jun 2014 John Wise Leave a comment

Conference (website) at University of Edinburgh

(Day 1) 10 June 2014

Clark – The formation of Pop III stars: first collapse and early fragmentation

(Greif+ 2011) Streaming velocities can delay Pop III star formation up to Δz ~ 4 and provide additional turbulence to the halo.
Review of H2 and HD cooling, where HD cooling is effective when electron … Continue Reading ››

Notes

Galactic Archaeology II Conference

27 May 2014 John Wise Leave a comment

Conference (website) in Palm Cove, QLD, Australia.

(Day 1) Tuesday, 27 May 2014

Will transcribe my notes someday.

(Day 2) Wednesday, 28 May 2014

Marino – Multiple GC Populations

Observational evidence in various GCs do not match single stellar populations (SSPs).
Second parameter: GCs with the same metallicity show different HB morphologies. See Catelan (2009) for a review.
Other evidence: multiple/spread … Continue Reading ››

News

“Birth of a Galaxy III” Paper Accepted

19 May 2014 John Wise Leave a comment

Our paper on the properties of the first galaxies, titled "Birth of a Galaxy - III: Propelling reionisation with the faintest galaxies" has been accepted to the Monthly Notices of the Royal Astronomical Society!

Computational Cosmology at Georgia Tech

New Postdoc: KwangHo Park

Quoted in a New Scientist Article

New Paper: Pre-reionization Galaxy Scaling Relations

Lyman Continuum Leakage and Reionization Conference

(Day 1) Wednesday, 13 August 2014

Mellema – Introduction

Gnedin – Cosmic Reionization on Computers (CROC)

New Paper: Massive Black Hole Seed Formation

“Birth of a Galaxy III” Press Release

New Postdoc: Ayçin Aykutalp

Physics of First Star and Galaxy Formation Conference

(Day 1) 10 June 2014

Clark – The formation of Pop III stars: first collapse and early fragmentation

Galactic Archaeology II Conference

(Day 1) Tuesday, 27 May 2014

(Day 2) Wednesday, 28 May 2014

Marino – Multiple GC Populations

“Birth of a Galaxy III” Paper Accepted

Simulating the Universe