The nature of the reflection nebula associated with NGC 7538/IRS 9

Details The nature of the reflection nebula associated with NGC 7538/IRS 9 The nature of the reflection nebula associated with NGC 7538/IRS 9

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...190..283e&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 190, no. 1-2, Jan. 1988, p. 283-288. Research supported by the Max-Planck-Gese

Astronomy and Astrophysics

Astronomy

7

Infrared Sources (Astronomy), Molecular Clouds, Reflection Nebulae, Astronomical Maps, Polarimetry, Protostars

Scientific paper

Deep CCD images at 0.7 and 0.9 μm polarimetry at 0.9 μm of the field around the protostellar source NGC 7538/IRS 9 are presented. Two sources of diffuse continuum emission separated by a dark lane are found near the young stellar object. The polarization vectors all center to a position near IRS 9, demonstrating that the two diffuse emission regions are reflection nebulae illuminated by a source near or at the position of IRS 9. NGC 7538/IRS 9 itself is not detected at a limiting I magnitude of 23.5 mag. The extinction in the line of sight to the infrared source is estimated by different methods to be at least Av > 25.4 mag. A new double star surrounded by a reflection nebula has been discovered and probably represents another young object in the NGC 7538 molecular cloud.

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