Search for HPM stars in UWISH2D. 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

or growing hair seen from 10km

HPM stars are either:

very nearby

or

very fast

Nearby Objects:

Low mass stars

Brown Dwarfs

White Dwarfs

Companions to known objects

Nearby Objects:

Very incomplete

even within

10pc!

Nearby Objects:

Very incomplete

in Galactic Plane

Nearby White Dwarfs:

Incomplete

at d>13pc

There are nearby Objects to be found

in or near the Galactic Plane

UKIRT Widefield Infrared Survey for H2

D. Froebrich

and the UWISH2 survey team

(~40 people)

SPECIFICALLY WEARE 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

3.8 m United Kingdom Infrared Telescope, Mauna Kea, Hawaii

Wide Field Camera (WFCAM)

• 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

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

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)

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

UWISH2 Website

http://astro.kent.ac.uk/uwish2/

UWISH2 Website

http://astro.kent.ac.uk/uwish2/

UWISH2 Website

http://astro.kent.ac.uk/uwish2/

UWISH2 Website

http://astro.kent.ac.uk/uwish2/

Download DS9 viewer

http://hea-www.harvard.edu/RD/ds9/

Start Searching

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