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J/A+A/384/1050     Interstellar polarization. VI.            (Berdyugin+, 2002)
Interstellar polarization at high galactic latitudes from distant stars.
VI. Extended polarization map and connection with the local spiral structure.
    Berdyugin A., Teerikorpi P.
   <Astron. Astrophys. 384, 1050 (2002)>
   =2002A&A...384.1050B
ADC_Keywords: Polarization ; Galactic pole, north

Keywords: polarization - ISM: dust, extinction - Galaxy: structure -
          Galaxy: general

Abstract:
    We present new interstellar polarization measurements for 116 stars at
    high galactic latitudes. Our data show that Markkanen's cloud - the
    main polarization structure seen in the North Galactic Pole area
    (b>75°) extends further towards lower latitudes. Especially, we
    have found a new dust formation in the area 35°<l<45°,
    57°<b<63°. Interstellar polarization in this part of the sky
    peaks at 0.7%, which gives a lower limit to the extinction
    AV>0.23mag. Polarization vectors in this cloud are very well aligned
    along the direction of l=50°. On the IRAS 100 micron map this dust
    structure shows up as a bright emission area. We discuss the new
    polarization map extending from circumpolar to lower latitudes and
    point out features which suggest that Markkanen's cloud may be a part
    of the dust lane in the inner edge of the local spiral or spur.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        52      102   New polarization measurements


See also:
   J/A+A/372/276 : Polarization catalogue for NGP area (Berdyugin+, 2001)


Byte-by-byte Description of file: table1.dat

   Bytes Format Units   Label     Explanations

   1-  9  A9    ---     BD        BD number of the star
  11- 14  F4.2  %       Pol       Polarization percentage.
      16  I1    ---     r_Pol     [1-2] Source of data (1)
  18- 21  F4.2  %       e_Pol     Error of polarization measurement
  23- 25  I3    deg     theta     ? Position angle of polarization vector
                                     measured in the equatorial coordinate frame
  27- 28  I2    deg     e_theta   ? Error of position angle measurement
  30- 32  I3    pc      Dist      Distance to the star
  34- 39  F6.2  deg     GLON      Galactic longitude
  41- 45  F5.2  deg     GLAT      Galactic latitude
  47- 51  A5    ---     SpType    Spectral type, when available

Note (1): Source of polarisation data:
     1: from the KVA 60 cm telescope
     2: from the NOT 2.56 m telescope


History:
  * 08-Jun-2002: the BD number originally written "+91 2793" was
    corrected to "+19 2793"
Acknowledgements: Andrei Berdyugin 

Acknowledgements: Andrei Berdyugin 


References:
   Berdyugin et al.,       Paper I     1995A&A...294..568B
   Berdyugin & Teerikorpi, Paper II    1997A&A...318...37B
   Berdyugin et al.,       Paper III   2000A&A...358..717B
   Berdyugin et al.,       Paper IV    2001A&A...372..276B, Cat. J/A+A/372/276
   Berdyugin & Teerikorpi, Paper V     2001A&A...368..635B
(End)                                        Patricia Bauer [CDS]    15-Mar-2002