The masses of the neutron and donor star in the high mass X-ray binary IGR J18027-2016

Details The masses of the neutron and donor star in the high mass X-ray binary IGR J18027-2016 The masses of the neutron and donor star in the high mass X-ray binary IGR J18027-2016

2011-06-28

arxiv.org/abs/1106.5821v2

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

5 pages, 4 figures, Accepted for publication in A&A

Scientific paper

We report near-infrared observations of the supergiant donor to the eclipsing high mass X-ray binary pulsar IGR J18027-2016. We aim to determine its spectral type and measure its radial velocity curve and hence determine the stellar masses of the components. ESO/VLT observations of the donor utilising the NIR spectrograph ISAAC were obtained in the H and K bands. The multi-epoch H band spectra were cross-correlated with RV templates in order to determine a radial solution for the system. The spectral type of the donor was confirmed as B0-1 I. The radial velocity curve constructed has a semi-amplitude of $23.8 \pm 3.1$ km s$^{-1}$. Combined with other measured system parameters, a dynamically determined neutron star mass of 1.4 $\pm$ 0.2 - 1.6 $\pm$ 0.3 M$_{\odot}$ is found. The mass range of the B0-B1 I donor was 18.6 $\pm$ 0.8 - 21.8 $\pm$ 2.4 ~M$_{\odot}$. These lower and upper limits were obtained under the assumption that the system is viewed edge-on (i = 90$^\circ$ with $\beta$ = 0.89) for the lower limit and the donor fills its Roche lobe ($\beta = 1$ with i = 73.1$^\circ$) for the upper limit respectively.

Affiliated with

Also associated with

No associations

Rating

The masses of the neutron and donor star in the high mass X-ray binary IGR J18027-2016 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 The masses of the neutron and donor star in the high mass X-ray binary IGR J18027-2016, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The masses of the neutron and donor star in the high mass X-ray binary IGR J18027-2016 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-358702