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Here are the problems/issues: Most stars are born in clusters/associations but a cursory investigation of cluster demographics with age reveals that the vast majority of clusters do not survive to old age. The majority either are never gravitationally bound to begin with or become unbound in the first 10 Myr. The Sun was likely born in a cluster of $10^3-10^...


4

Short answer: No and yes. Do ASKAP and/or ALMA have "fast dump" interferometric modes? Or do they have at least some way to extract dispersion of transient events at the millisecond level? ASKAP has FREDDA which searches in total-intensity filterbanks (aka dynamic spectra) and triggers the voltages for imaging or localizing the FRB. general ...


3

Stand on dune in a desert. Take a handfull of sand, all crushed from the same rock. Now close your eyes, Hold your hand up to the wind, let the wind blow all but one of the grains of sand, somewhere. Wait 2 years. Now go and find the other grains of sand that you dropped. It should be easy, right? They have identical composition as the sample you have. They ...


2

I'm going to make the assumption that the "aperture" of the instrument refers to the width of a fibre that feeds a spectrograph (I can't think of any other plausible scenario). What you want is to enclose the most power you can within a 2 arcsec diameter in the telescope focal plane at the wavelengths of interest. One confounding effect is the ...


1

@ProfRob 's answer helped me understand what is going on, but I would like to add something. If the telescope pointing is optimized for 5000 angstrom the aperture of 2" will completely contain an area of 1" that corresponds to 80% of the energy. If you keep the telescope pointing fixed, but trace the light at 3200 angstrom the "disk" of 1&...


1

Further to Surya answer, yes ASKAP can and does detect FRBs in semi-realtime. The reporting to the outside world is far from realtime, unfortunately. In summary an incoherent sum all antennas is made (ie sum of the power) with coarse spectral resolution (1 MHz) and relatively short integration time (~1 millisec). This data is searched in realtime and FRB ...


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