Date:
Tue, 03/05/201612:30-13:30
Location:
Kaplun building, Room No. 200
Lecturer: Dr. Serena Repetto
Affiliation:
Technion - Israel Institute of Technology
Abstract:
The aim of this work is to study the imprints
that different models for black hole (BH) and
neutron star (NS) formation have on the
Galactic distribution of X-ray binaries (XRBs)
which contain these objects. We find that the
root mean square of the height above the
Galactic plane of BH- and NS-XRBs is a
powerful proxy to discriminate among
different formation scenarios, and that binary
evolution following the BH/NS formation does
not significantly affect the Galactic
distributions of the binaries.
We find that a population model in which at
least some BHs receive a (relatively) high
natal kick fits the observed BH-XRBs best. For
the NS case, we find that a high NK
distribution, consistent with the one derived
from the measurement of pulsar proper
motion, best fits the observed data. We also
analyze the simple method we previously used
to estimate the minimal peculiar velocity of an
individual BH-XRB at birth. We find that this
method may be less reliable in the bulge of the
Galaxy for certain models of the Galactic
potential, but that our estimate is excellent for
most of the BH-XRBs.
Additional details of the upcoming Astrophysics'
seminars can be found on the following link.
האירוע הזה כולל שיחת וידאו ב-Google Hangouts.
הצטרף: https://hangouts.google.com/hangouts/_/mail.huji.ac.il/astrophysics?hceid=bWFpbC5odWppLmFjLmlsX2c0czhydDlpcmhwZzRvdGNybWIzZGFqcjdvQGdyb3VwLmNhbGVuZGFyLmdvb2dsZS5jb20.n2d3rfrtbk1nar0i7mikup3edo&hs=121