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:
Astronomical Polycyclic Aromatic Hydrocarbons: Yesterday, Today, and Tomorrow
Louis J. Allamandola
(NASA Ames Research Centre)
The infrared signature of Polycyclic Aromatic Hydrocarbons (PAHs) is common throughout the cosmos. Astronomical PAHs, excited by the ambient radiation field in different objects, relax by emitting infrared radiation at their characteristic vibrational frequencies. PAH emission spectra show variations that depend on position in extended objects and type of source, revealing PAH size, structure, and ionization state. Since these spectral variations reflect local conditions such as electron density, radiation field, chemical history, and so on, they are becoming new probes of astronomical environments.
After briefly summarizing the development of the PAH model, this talk will focus on recent applications of the NASA Ames PAH IR spectral Database to interpret astronomical observations. This database now includes PAHs with more than 100 carbon atoms, species comparable in size to those expected of the interstellar species. Examples will be given showing how the spectra from different objects reveal details about the PAH population in that object, details which, in turn, reflect local conditions. Lastly, since PAHs are so widespread throughout the cosmos, this talk will conclude with a short summary of PAH transitions that fall in other wavelength regions, transitions which should impact astronomical observations from the UV through the radio.