Optical images of MCLD123.5+24.9: a cloud illuminated by the North star?

Details Optical images of MCLD123.5+24.9: a cloud illuminated by the North star? Optical images of MCLD123.5+24.9: a cloud illuminated by the North star?

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26a...352..645z&link_type=abstract

Astronomy and Astrophysics, v.352, p.645-658 (1999)

Astronomy and Astrophysics

Astrophysics

21

Ism: Clouds, Ism: Dust, Extinction, Ism: Individual Objects: Mcld123.5+24.9, Stars: Individual: Polaris, Scattering

Scientific paper

We present B R I images of a 1degr {x}1degr field centered on the molecular cloud (MCLD123.5+24.9) located in the large infrared cirrus known as the Polaris Flare. The optical images are compared with IRAS images and an extinction map derived from stellar reddenings. We analyse the possibility for the North star (HD8890), only 1degr North of the field, to be the source of MCLD123.5+24.9 optical emission. For widely accepted values of the dust albedo (omega = 0.6) and the assymetry parameter of the Henyey Greenstein phase function (0.7

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