Tim Naylor

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New CCD projects for Amateur Telescopes

• Tim Naylor
• School of Physics
• University of Exeter

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Keele Observatory
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Star Formation

• Exeter group.
• Study of stars younger than 10 Myr,
  pre-main-sequence stars.
• Low mass (lt 1M?) are T Tauri stars.
• Higher mass are Herbig Ae/Be stars.

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University of Exeter Observatory
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University of Exeter Observatory

• 10 f/10 Meade ST7 CCD/Guider
• SBIG Spectrograph
• Digital Dome Works remote dome rotation.
• All run from PC in dome
• Control room 100m away, uses VNC.
• Funded from Donald Barber Bequest
• Seeing around 5 arcseconds.

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Real CMDs

• Mixture of,
• Distances
• Luminosities
• Ages
• Even clusters suffer contamination from
• Foreground
• Background

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NGC2547
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G. Bryden
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Work to Date

• Most star formation work has concentrated on
  nearby regions (100 pc away).
• Quiet backwaters forming only low-mass stars.
• Most stars born in OB associations, nearest is
  Orion Nebula (500pc) and most others 1000pc or
  more.
• Building up a lot of data for lt 1M?
• Information about interaction of star and disc.

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Proposed Programme

• To understand how Earth formed need ?1M?, in OB
  associations.
• At 1kpc R5½ 10 15½ or brighter.
• A few per OB association.
• Look once per night every clear night, some
  longer runs.
• Whats more they become radiative.

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Problems.

• Competition
• LT, perhaps but rather bright.
• Lack of good candidates.
• Im only fishing.
• Is is feasible?

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