Thats another interesting paper, Carl.
In the Final Thoughts Section:
Quote:
Rotating Radio Transients:
- over 30 currently known
- 2 glitches in RRAT J1819-1458; accompanied by long term decrease in spin down rate suggesting they occupied phase space populated by the magnetars. Further observations are needed to confirm this “exhausted magnetar” hypothesis. The Galactic population of such objects is potentially significant and it remains to be determined whether alternative evolutionary scenarios need to be invoked other than core-collapse supernova. Further work will certainly clarify this issue as known sources are better characterized.
Millisecond Pulsars:
- many questions remain to be answered including: (i) what is the overall Galactic distribution of millisecond pulsars?; (ii) is the millisecond pulsar luminosity function comparable to normal pulsars?; (iii) are all millisecond pulsars produced in low-mass X-ray binary systems?; and (iv) what is the origin of isolated millisecond pulsars?
Pulsars in Magellanic Clouds:
- Currently 19 radio pulsars are known in the Large and Small Magellanic Clouds;
- roughly 18,000 and 11,000 normal pulsars in the large and small clouds respectively;
- A substantial population of active radio pulsars (of order a few hundred thou- sand) have escaped the clouds and populate the local intergalactic medium. For the millisecond pulsar population, the lack of any detections from current surveys leads only upper limits of up to 40,000 sources in the two clouds.
Globular Cluster Pulsars:
- Currently, there are 140 radio pulsars in 26 GCs;
- If NSs are formed as in the Galaxy, i.e. in the core collapse supernovae of massive stars, then the large resultant velocities observed among the young pulsars would eject the vast majority of all NSs from GCs. This would result in a very small number of primordial NSs in clusters. How do GCs retain enough NSs to form all the quiescent LMXBs(??) and MSPs(??) we observe? Are there other NS formation mechanisms at work? We anticipate significant progress in many of these areas in the near future.
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All great stuff ! (I don't know the terms LMXBs and MSPs ?? Help ?)
Thanks for the 'heads-up' !!
Cheers