Abstract:
This paper describes the polarisation study of a Lynds cloud, LDN 1340, α = 2h32m and δ =
73◦00 corresponding to galactic coordinates of = 130◦.07 and b = 11◦.6, with emphasis on the RNO 8
area. The cloud has been observed using the 1.2 m telescope at Mt. Abu Infrared Observatory, in the infrared
wavelength band using the Near-Infrared Camera, Spectrograph and Polarimeter instrument. The polarimetric
observations were used to map the magnetic field geometry around the region. We combined our measurements
with archival data from the 2MASS and WISE surveys. The Gaia EDR3 and DR3 data for the same region were
used for distance, proper motion, and other astrophysical information. The analysis of the data reveals areas
with ordered polarisation vectors in the region of RNO 8. The position angle measurements reveal polarisation
due to dichroic extinction which is consistent with the Galactic magnetic field. The magnetic field strength was
calculated for the RNO 8 region using the Chandrashekhar–Fermi method and the value estimated is ∼42 μG
