In order to enable an iCal export link, your account needs to have an API key created. This key enables other applications to access data from within Indico even when you are neither using nor logged into the Indico system yourself with the link provided. Once created, you can manage your key at any time by going to 'My Profile' and looking under the tab entitled 'HTTP API'. Further information about HTTP API keys can be found in the Indico documentation.
Additionally to having an API key associated with your account, exporting private event information requires the usage of a persistent signature. This enables API URLs which do not expire after a few minutes so while the setting is active, anyone in possession of the link provided can access the information. Due to this, it is extremely important that you keep these links private and for your use only. If you think someone else may have acquired access to a link using this key in the future, you must immediately create a new key pair on the 'My Profile' page under the 'HTTP API' and update the iCalendar links afterwards.
Permanent link for public information only:
Permanent link for all public and protected information:
Axion-like particles and galaxy cluster X-rays as a window to the dark sector
Axion-like particles (ALPs) can convert into photons in the
presence of coherent background magnetic fields. Galaxy clusters are the
largest gravitationally bound objects in the universe and support magnetic
fields that are coherent over kiloparsec scales. In this talk, I will
discuss how the conversion of ALPs into X-ray photons in clusters of
galaxies provide a window to the dark sector, and in particular how the
different observations (null and otherwise) of an X-ray line at 3.5 keV
from galaxies and clusters are consistent with a scenario in which dark
matter decays into ALPs that subsequently convert into photons in
astrophysical magnetic fields. Furthermore, I will mention how a cosmic
background of relativistic ALPs is a generic outcome in known classes of
stabilised string compactifications, and how such ³dark radiation², if
present, may explain the longstanding question of the nature of the soft
X-ray excess in clusters of galaxies.