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Search for HPM stars in UWISH2

Search for HPM stars in UWISH2. D. Froebrich. Thank you very much for your interest!. Today: Why are HPM Stars interesting? What is UWISH2? How to identify HPMs?. HPM – High Proper Motion > 200mas/yr or 1” in 5yrs or about 60mph at d=10000AU or about 200km/s at 100pc

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Search for HPM stars in UWISH2

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  1. Search for HPM stars in UWISH2 D. Froebrich

  2. Thank you very much for your interest!

  3. Today: Why are HPM Stars interesting? What is UWISH2? How to identify HPMs?

  4. HPM – High Proper Motion > 200mas/yr or 1” in 5yrs or about 60mph at d=10000AU or about 200km/s at 100pc or growing hair seen from 10km

  5. HPM stars are either: very nearby or very fast

  6. Nearby Objects: Low mass stars Brown Dwarfs White Dwarfs Companions to known objects

  7. Nearby Objects: Very incomplete even within 10pc!

  8. Nearby Objects: Very incomplete in Galactic Plane

  9. Nearby White Dwarfs: Incomplete at d>13pc

  10. There are nearby Objects to be found in or near the Galactic Plane

  11. UKIRT Widefield Infrared Survey for H2 D. Froebrich and the UWISH2 survey team (~40 people)

  12. SPECIFICALLY WE • ARE SEARCHING FOR…: • Jets and outflows in • (high-mass) star forming regions • H2 emission in IRDCs • HII regions • Highly variable stars • (Proto-)Planetary Nebulae • Supernova remnants • ...anything else unusual

  13. 3.8 m United Kingdom Infrared Telescope, Mauna Kea, Hawaii Wide Field Camera (WFCAM)

  14. Four Rockwell Hawaii-II 2048 x 2048 pixel HgCdTe arrays • Each array covers a FoV of 13.7’x13.7’ with a pixel scale of 0.4” • Four positions on-sky are required to cover a 0.75 sq deg “tile” • Filters: K, H2 1-0 S(1) • micro-stepping  0.2” pixel scale

  15. 4 observations (1,2,3,4) to cover 1 ‘tile’ each observation contains 4 images, one from each detector (w,x,y,z) each observation stored in one MEF file (1 for H2, one for K) (Multi-Extension-FITS file) Naming convention: ‘Tile’ Name: e.g. H2_l15_50: 352 unique for each tile Observation name: e.g. w20100812_01368 (w<date>_<imagenumber>) four per tile

  16. Coverage in K and H2 : Along the Galactic Plane (+/-1.5°) from l=7° to l=65° about 180 square degrees! or 234 tiles = 3744 images á 4k x 4k pixels (936 MEFs)

  17. Howto search? 1) Email df @ star.kent .ac.uk 2) Wait for response containing: your login and password tile name and image name to search 3) Search and return results 4) goto point 2) if you like

  18. UWISH2 Website http://astro.kent.ac.uk/uwish2/

  19. UWISH2 Website http://astro.kent.ac.uk/uwish2/

  20. UWISH2 Website http://astro.kent.ac.uk/uwish2/

  21. UWISH2 Website http://astro.kent.ac.uk/uwish2/

  22. Download DS9 viewer http://hea-www.harvard.edu/RD/ds9/

  23. Start Searching .....

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