Linear Polarization Towards Galactic Anticenter direction: the Case of Alessi 1
Sadhana Singh,
Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263001, India,
ssingh@aries.res.in
Jeewan Chandra Pandey,
Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263001, India,
jeewan@aries.res.in
Ramakant Singh Yadav,
Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263001, India
Biman Jyoti Medhi,
Gauhati University, Guwahati 781014, India
Arti Joshi,
Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263001, India
Bharti Arora,
Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263001, India
Abstract
We present linear polarization towards the direction of the star cluster Alessi 1, which is located in the anti-galactic centre direction. We have observed the cluster using ARIES IMaging POLarimeter (AIMPOL) as a back-end instrument at 104-cm Sampuranand telescope, ARIES, Nainital. The average degree of polarization towards the cluster Alessi 1 are found to be 0.80±0.38 %, 0.80±0.23 %, 0.81±0.26 %, 0.86±0.32 %, in B, V, R, and I photometric bands, respectively, whereas the position angles are found to be 86±11o, 81±10o, 78±8o, 85±8o in B, V, R, and I bands, respectively. Polarization towards Alessi 1 cluster is dominated by foreground dust grains and probably a single layer of the polarized source appears to exist at ~ 0.7 kpc close to Alessi 1 cluster. The minor axis of dust grains towards the cluster Alessi 1 appears aligned along the galactic magnetic field.
Keywords : polarization, cluster, individual, Alessi 1, dust, interstellar matter
Pour citer cet article
Sadhana Singh, Jeewan Chandra Pandey, Ramakant Singh Yadav, Biman Jyoti Medhi, Arti Joshi & Bharti Arora, «Linear Polarization Towards Galactic Anticenter direction: the Case of Alessi 1», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 88 - Année 2019, Actes de colloques, 2nd Belgo-Indian Network for Astronomy & Astrophysics (BINA) workshop - October 2018 - Brussels, Belgium, 283 - 286 URL : http://popups.ulg.be/0037-9565/index.php?id=8982.
