Weibin Shi, Xiaohui Sun, Wolfgang Reich Jinlin Han, Patricia Reich, Richard Wielebinski

Partner Group of MPIfR at NAOC

Primary results for 6cm polarization Survey of the Galactic Plane

Outlines●Motivation●Observation Status ●Observation Strategy●Data Reduction●Initial results

Motivation: Go to higher frequency ( previously 11cm, 21cm )

little affected by foreground Faraday depolarization

The same HPBW with Effelsberg 21 cm data

Survey products and scientific contribution: Absolute calibrated TP & PI maps of the Galactic plane:

construct foreground template for CMB polarizationunderstand magnetic field structure of our Galaxydisentangle ISM structure of the Galaxy combined

other database

D=25mLongitude: 87d 10’ 40.44”E Latitude: 43d 28’ 16.14”N Altitude: 2029 m

Need to observe : longitude about 10deg to 240deg, latitude -5deg to 5deg, about 2300 square degree.

Observation Status

Good part 46.1deg: 95.9deg to 142deg,Have reduced 33.1deg: 95.9deg to 129deg,No reduction 13deg: 129deg to 142deg.

B direction: every part is 2deg x 10deg (3h25m) or 2.2deg x 10deg (3h45m)

L direction: The width: 2.6deg The length: consider Galactic structure

Observation Strategy

Map Observation

Receive telescope position once every secondscan velocity 2' / sscan spacing 3' integration time 1.5sone night can observe two regions

Data Reduction● Set baselines● Correct parallactic angles● Edit spikes, jumps and scanning

effects● Calibration● Weave● Combination● Absolute Calibration

HII Regions

Supernova Remnants

G106.3+2.7

G109.1-1.0 CTB109

G111.7-2.1 Cas A

G114.3+0.3G116.5+1.1

G116.9+0.2 CTB1

G120.1+1.4

G126.2+1.6

G127.1+0.5 R5

Intensity(image)+B(bars)

Intensity(image)+E(bars)

Polarization Intensity(image) +Intensity(contour)

Polarization Intensity(image) )+B(bars)

Next we will do

•more observation•more reduction•compare 6cm, 11cm, 21cm to obtain Spectral index•confirm sources (Supernova Remnants, HII regions)• Get flux intensity•try to find some new sources•Analyze absolute calibrated TP & PI maps

construct foreground template for CMB polarizationunderstand magnetic field structure of our Galaxydisentangle ISM structure of the Galaxy combined other database

Thank you !