Searching for the first stars with the Gaia mission

Details Searching for the first stars with the Gaia mission Searching for the first stars with the Gaia mission

2011-12-29

arxiv.org/abs/1112.6270v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

8 pages, 7 figures

Scientific paper

We construct a theoretical model to predict the number of orphan afterglows (OA) from gamma-ray bursts (GRBs) triggered by primordial metal free (Pop III) stars expected to be observed by the Gaia mission. In particular, we consider primordial metal free stars which were affected by radiation from other stars (Pop III.2) as a possible target. We use a semi-analytical approach, with the inclusion of all relevant feedback effects, to construct the cosmic star formation history and its connection with GRBs cumulative number. The OA events are generated via Monte-Carlo method, and realistic simulations of Gaia's scanning law are performed to derive the observation probability expectation. We show that $\sim 0.4\%$ of all Pop III.2 afterglows should appear in the sky above of Gaia observational flux limit. Combining this result with simulations of Gaia's scanning law, we expect to observe an average of $\sim 13\% \pm 7\%$ of all OA above the observational sensitivity.

Affiliated with

Also associated with

No associations

Rating

Searching for the first stars with the Gaia mission does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Searching for the first stars with the Gaia mission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Searching for the first stars with the Gaia mission will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-728413