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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

(Volume 88 - Année 2019 — Actes de colloques — 2nd Belgo-Indian Network for Astronomy & Astrophysics (BINA) workshop - October 2018 - Brussels, Belgium)
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Mots-clés : polarisation, cluster, Alessi 1, poussière, matière interstellaire

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

To cite this 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 : https://popups.uliege.be/0037-9565/index.php?id=8982.

About: Sadhana Singh

Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263001, India, ssingh@aries.res.in

About: Jeewan Chandra Pandey

Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263001, India,  jeewan@aries.res.in

About: Ramakant Singh Yadav

Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263001, India

About: Biman Jyoti Medhi

Gauhati University, Guwahati 781014, India

About: Arti Joshi

Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263001, India

About: Bharti Arora

Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263001, India