Stellar Archaeology as a Time Machine to the First Stars

Session

Further Pop III Constraints

6 Dec 2018, 09:30

Lecture Hall (Kavli IPMU)

83. Empirical Constraints for the Theory of Pop III Star Formation

Prof. Volker Bromm (The University of Texas, Austin)

06/12/2018, 09:30

Further Pop III constraints (GWs, supernovae, 21cm signal, etc.)

Understanding the formation of the first (Pop III) stars at the end of the cosmic dark ages is one of the outstanding problems in modern cosmology. Based on numerical simulations, an increasingly detailed theoretical framework has emerged for how this happened. The key challenge now is to test our ideas with frontier observations over the next decade. The James Webb Space Telescope promises...

71. The remnants of first stars for gravitational wave sources

Dr Tomoya Kinugawa (The University of Tokyo)

06/12/2018, 10:15

Further Pop III constraints (GWs, supernovae, 21cm signal, etc.)

Using our population synthesis code, we found that the typical chirp mass of binary black holes (BH-BHs) whose origin is the first star (Pop III) is ~30Msun with the total mass of ~60Msun so that the inspiral chirp signal as well as quasi normal mode (QNM) of the merging black hole are interesting targets of LIGO,VIRGO and KAGRA (Kinugawa et al.2014 and 2016). The detection rate of the...

40. Observability of low mass Pop III survivors in the Milky Way and dwarf galaxies

Tomoaki Ishiyama

06/12/2018, 10:45

Further Pop III constraints (GWs, supernovae, 21cm signal, etc.)

We study the number and the distribution of low mass Pop III stars in the Milky Way. In our model, hierarchical formation of dark matter minihalos and Milky Way sized halos are followed by high resolution cosmological simulations. We model the Pop III formation in H2 cooling minihalos without metal under UV radiation of the Lyman-Werner bands. Assuming a Kroupa IMF from 0.15 to 1.0 Msun for...

13. Aspherical supernova explosions in the First Milky Way progenitors

Rana Ezzeddine (Massachusetts Institute of Technology/JINA-CEE)

06/12/2018, 11:30

Further Pop III constraints (GWs, supernovae, 21cm signal, etc.)

Elements heavier than hydrogen and helium were first produced in the universe within the first stars. After a few million years, these presumably massive stars exploded as the first supernovae, ejecting the newly forged elements. Theoretical investigations have long indicated that such supernovae would explode in an asymmetric fashion, but insufficient observational evidence has prevented...

70. CAIUS: SYNTHETIC OBSERVATIONS USING A ROBUST RADIATIVE TRANSFER PIPELINE

Dr Kirk Barrow (Georgia Institute of Technology)

06/12/2018, 11:50

Further Pop III constraints (GWs, supernovae, 21cm signal, etc.)

As astronomers peer ever-deeper into the high-redshift Universe, a bevy of astrophysical questions on early star, black hole, and galactic structure formation await on the precipice of their elucidation. However, to truly and more completely decipher the first faint images from the Cosmic Dawn, a new generation of diagnostic and predictive tools is needed to bridge the gap between the...

41. Growth of intermediate mass black holes in the first star clusters

Yuya Sakurai (Georgia Institute of Technology)

06/12/2018, 12:10

Others

We study the evolutions of eight primordial star clusters of Sakurai et al. (2017) after runaway stellar collisions and formation of massive stars and intermediate-mass black holes (IMBHs). Performing N-body simulations for ∼15Myr to follow star cluster dynamics with dark matter (DM) dynamics, we find that stars intrude into the IMBH and can cause tidal disruption events. By the TDEs, the...