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Home Forums General Discussion RAS Public Lecture – How to find exoplanets

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This topic contains 6 replies, has 4 voices, and was last updated by  Tej 4 years, 8 months ago.

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  • #7888

    Tej
    Participant
    Topics: 39
    Replies: 597

    Anyone going to this public invite lecture tomorrow?

    https://www.ras.org.uk/component/gem/?id=336

    #7890

    Mike Meynell
    Moderator
    Topics: 119
    Replies: 756

    Sounds very interesting, but I’m not in London this weekend, so I’ll miss it.

    #7891

    Andy Sawers
    Moderator
    Topics: 125
    Replies: 602

    No, but I’m going to this one, thanks to Brian’s posting.

    http://flamsteed.info/forums/topic/ras-talk/

    EDIT: I’ve just noticed that the RAS website says the October talk is a change from the original BICEP2 topic. Same speaker, however – Dr Hiranya Peiris

    • This reply was modified 4 years, 8 months ago by  Andy Sawers.
    • This reply was modified 4 years, 8 months ago by  Andy Sawers. Reason: RAS topic change
    #7895

    Brian Blake
    Participant
    Topics: 188
    Replies: 409

    I have heard this talk before Tej.  Really good, worth going.

    #7896

    Brian Blake
    Participant
    Topics: 188
    Replies: 409

    Andy I suspect she will include the BICEP2 results in her talk as the two teams are collaborating. Note the location it is not in RAS building but Geological Society whose entrance is on Piccadilly.

    • This reply was modified 4 years, 8 months ago by  Brian Blake.
    #7899

    Andy Sawers
    Moderator
    Topics: 125
    Replies: 602

    Good point, Brian. Thank you. Oh – and thanks for the pointer about the venue!

    #7900

    Tej
    Participant
    Topics: 39
    Replies: 597

    I attended the lecture. Brian, you’re right it was a really good talk.

     

    He covered four methods of finding Exoplanets using props to demonstrate such methods as doppler shift, by lassoing an annoying musical doorbell siren while we duck under the table in fright of him losing grip.  Another using light bulbs and a light reading meter to demo light dip transits, </span>then using himself to walk towards us and asking us if he looks bluer, lol…naturally, that particular red/blue shift demo didnt quite work.

     

    Overall he was confident we will have the sensitivity in our detectors to confirm either way the possibility of earth like planets through detection of carbon based atmosphere within twenty years.  He doesn’t speculate whether we will find any but what’s exciting is that we have the tech and sensitivity to cover huge enough areas of the sky to know either way and relatively soon.

     

    The talk also reminded me of our exoplanets discussion on another thread, Mikes probability formula and Andy’s persistent scrutiny on it the statistical calculations of exoplanet finding.  So at the end of the lecture during audience q&a, I asked a couple of questions about finding exoplanets for star systems whose planetary orbital planes are not edge on or within the tilt of our line of sight.  His answer was we can still detect an exoplanetary system  by a fifth method that he didn’t cover in the lecture and that was simply by watching out for the circum movement of the star caused by the gravitational mass tugging of any exoplanets.   The caveat is that these exoplanets can only remain as candidates and never confirmed..at least fro a very long time because they would need to be confirmed by two different methods, generally.

     

    I learnt a little more from this and it’s exciting to see the progress and accelerating activity of different exoplanet finding groups are making.

     

     

    Edit:  Sorry for the complete mess in format originally, not sure what happened there…

    • This reply was modified 4 years, 8 months ago by  Tej.
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