List of publications related to the X-IFU
You will find here X-IFU related publications.
Athena X-IFU synthetic observations of galaxy clusters to probe the chemical enrichment of the Universe.
What are we made of? Most of the atoms and elements we know of are formed within stars, either during their life (winds) or during powerful end-of-life phenomena called supernovae. In fact, different mechanisms of metal creation exist in the Universe and elements were not formed evenly during its history. To investigate this chemical enrichment, one must look in the X-rays at the hot gas within clusters of galaxies – the intra cluster medium (ICM) – which is continuously enriched through time by the billions of stars contained in its galaxies. However, to perform meaningful studies of the enrichment through cosmic time, a combination of a high-resolution spatially-resolved spectroscopy and a large telescope collective area is required. For this reason, the Athena/X-IFU will be the breakthrough instrument to investigate metal formation and circulation in the Universe.
In this paper, we tested the power of the X-IFU to fulfill this specific science objective. Using a set of simulated clusters derived from hydrodynamical simulations, we performed synthetic observations of this sample of objects through time, up to a redshift z=2 (10.4 billion years ago) with a completely realistic set-up (including e.g., background, instrumental effects). We demonstrated that with routine 100 ks observations, the X-IFU will be able to study the enrichment with unprecedented accuracy out to the outskirts of the clusters and provide solid answers to the origin of their metal content.
This work is paramount in the Athena context, as it shows the power of the mission in answering some of the key astrophysical questions of our time. It also serves as a feasibility study of the X-IFU, consolidating the current design and the need for spatially-resolved high-resolution spectroscopy.
Cucchetti et al. – Athena X-IFU synthetic observations of galaxy clusters to probe the chemical enrichment of the Universe.
Date: 26/09/2018 Astronomy & Astrophyics
Defocussing of the Athena optics is now a requirement and can be considered in evaluating the count rate performance of the X-IFU. Defocussing spreads the source counts over a large number of pixels (1000). Each pixel can sustain a count rate of the order of 40-50 cps. A Crab like source would produce about 90 000 cps over the full TES array. Therefore it is obvious that with defocussing, the X-IFU is capable of observing bright point sources.
High throughput for mid and high resolution events (spectral resolution less than 10 eV) is certainly required around the Iron like between 5 and 8 keV. The use of Be filters would remove a large fraction of the soft photons and therefore reduce the overall count rate of point sources while preserving the interesting events above 5 keV. The X-IFU can achieve throughputs as high as 70% with maximum defocussing and the use of Be filter. The above number will reduce (by a few 10% at 1 Crab) if events affected by cross talk are removed.
The figures shown above are courtesy of Philippe Peille (December 2016), on behalf of the end-to-end simulator team.
- The X-ray Integral Field Unit (X-IFU) for Athena - Ravera et al.
and the accompanying talk can be downloaded here
- The DRE, the digital readout electronics for Athena X-IFU - Ravera et al.
- The Cryogenic AntiCoincidence detector for Athena: the progress towards the final pixel design - Macculi et al.
- Background simulations for the Athena X-IFU instrument: impact on the instrumental design - Lotti et al.
- Requirements for the detectors and read-out of Athena X-IFU - Den Hartog et al.
- Towards Mo/Au based TES detectors for Athena/X-IFU - Fabrega et al.
- Baseline design of the thermal blocking filters for the X-IFU detector on board ATHENA - Barbera et al.
- Athena end-to-end simulations - Wilms et al.
The 10th issue of the X-IFU Gazette has just been released.
Jiri Svoboda from the Astronomical Institute (Czech Academy of Science) has been appointed board member, and Jan Soucek from the...
Time has come to close 2018. This has been another very important year for X-IFU with the formal appointment of...
After more than four years of existence as a proto-consortium, on December 11th, 2018, following the successful completion of the...
EDITORIAL September was a rather busy month for X-IFU. Following the X-IFU Consortium meeting #8 held in Geneva on the...
The eighth X-IFU Consortium meeting was hosted by the University of Geneva. It span from September 10th to 14th. As...
Big day at IRAP, the Cryostat is now fully integrated and cooling down. This high precision technology equipment will eventually...
The overview X-IFU paper published in the proceedings of the SPIE 2018 in Austin (TX) is available from the ArXiv.