|Title||Age determination of common proper motion pairs: constraining the IFMR|
|Author||Dr Gloria Sala|
|Description||The initial-final mass relationship (IFMR) of white dwarfs is of paramount importance in modern astrophysics. To improve the IFMR, we use common proper motion pairs (CPMPs) to derive a semi-empirical relation. Recently we have acquired spectroscopy of both the WDs and companions of a selected sample of 10 CPMPs. The age of some evolved companions has been determined by isochrone fitting, but this method is not valid for stars too close to the ZAMS. An alternative age indicator is the X-ray luminosity, which for GKM stars follows a relation with the age (Ribas et al. 2008). Four sources of our sample still lack an age determination, and render our spectroscopic data useless to constrain the IFMR. We propose to observe with XMM two of those PCMP to determine their age.|
|Publication||Serendipitous UV source catalogues for 10 years of XMM and 5 years of Swift . Yershov, V. N., . Ap&SS . 354-97 . 2014 . 2014Ap&SS.354...97Y ,
XMM-Newton publication statistics . Ness, J.-U., Parmar, A. N., et all. . AN . 335-210 . 2014 . 2014AN....335..210N ,
Ensemble X-ray variability of active galactic nuclei. II. Excess variance and updated structure function . Vagnetti, F., Middei, R., et all. . A&A . 593-55 . 2016 . 2016A&A...593A..55V ,
The Million Optical - Radio-X-ray Associations (MORX) Catalogue . Flesch, Eric W., . PASA . 33-52 . 2016 . 2016PASA...33...52F ,
A new sample of X-ray selected narrow emission-line galaxies. II. Looking for True Seyfert 2 . Pons, E., Watson, M. G., . A&A . 594-72 . 2016 . 2016A&A...594A..72P ,
Dependence of the broad Fe Kalpha line on the physical parameters of AGN . Liu, Zhu, Yuan, Weimin, et all. . MNRAS . 463-684 . 2016 . 2016MNRAS.463..684L ,
A Comparison of X-Ray Photon Indices among the Narrow- and Broad-line Seyfert 1 Galaxies . Ojha, Vineet, Chand, Hum, et all. . ApJ . 896-95 . 2020 . 2020ApJ...896...95O ,
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2010-11-25T00:00:00Z, 060468, 17.56_20190403_1200. https://doi.org/10.5270/esa-c9k2lf5|