Name | 067118 |
Title | Probing the gravitational field around neutron stars with Fe lines and kHz QPOs |
URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0671180201 |
DOI | https://doi.org/10.5270/esa-0kivalg |
Author | Prof Mariano Mendez |
Description | Broad Fe lines have been detected in 10 neutron-star LMXBs. In two sources the Fe line and kHz QPOs give consistent values for the inner radius of the accretion disc, but measurements were not simultaneous. Using XMM-Newton/RXTE and Chandra/RXTE simultaneously, we have recently shown that in the LMXB 4U 1636-53 the Fe line and the kHz QPO yield different disc radii. The frequencies of the kHz QPOs correlate with the disc radius inferred from broad-band spectra, while the Fe line appears to change independently. We propose 5 simultaneous XMM-Newton/RXTE observations of the LMXB 4U 1728-34 with both a broad Fe line and kHz QPOs, using the long-term variability of this source to test the dynamics and correlation of the radii inferred from the line and the kHz QPOs. |
Publication | No observations found associated with the current proposal |
Instrument | EPN, OM, RGS1, RGS2 |
Temporal Coverage | 2011-08-28T14:08:20Z/2011-10-07T13:16:25Z |
Version | 17.56_20190403_1200 |
Mission Description | The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earth's atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis. |
Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
Date Published | 2012-10-26T00:00:00Z |
Publisher And Registrant | European Space Agency |
Credit Guidelines | European Space Agency, Prof Mariano Mendez, 2012, 067118, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-0kivalg |