Bulletin de la Société Royale des Sciences de Liège

0037-9565 1783-5720

 

sinds 05 februari 2011 :
Weergave(s): 1027 (8 ULiège)
Download(s): 2 (0 ULiège)
print        
Namita Uppal, Shashikiran Ganesh, Santosh Joshi, Mrinmoy Sarkar, Prachi Prajapati & Athul Dileep

Optical Polarisation Study of Galactic Open Clusters

(Volume 93 - Année 2024 — No 2 - Proceeedings of the 3rd BINA Workshop on the Scientific Potential of the Indo-Belgian Cooperation)
DOI: 10.25518/0037-9565.11636
Article
Open Access

Documenten bij dit artikel

Version PDF originale

Abstract

Dust is a ubiquitous component in our Galaxy. It accounts for only 1% mass of the ISM but still is an essential part of the Galaxy. It affects our view of the Galaxy by obscuring the starlight at shorter wavelengths and re-emitting in longer wavelengths. Studying the dust distribution in the Galaxy at longer wavelengths may cause discrepancies due to distance ambiguity caused by unknown Galactic potential. However, another aspect of dust, i.e., the polarisation of the background starlight, when combined with distance information, will help to give direct observational evidence of the number of dust clouds encountered in the line of sight. We observed 15 open clusters distributed at increasing distances in three lines of sight using two Indian National facilities. The measured polarisations results used to scrutinize the dust distribution and orientation of the local plane of sky magnetic fields towards selected directions. The analysis of the stars observed towards the distant cluster King 8 cluster shows two foreground layers at a distance of ∼ 500 pc and ∼ 3500 pc. Similar analysis towards different clusters also results in multiple dust layers.

Keywords : Multiple Stellar Systems, polarisation observations, data reduction, dust distribution

Om dit artikel te citeren:

Namita Uppal, Shashikiran Ganesh, Santosh Joshi, Mrinmoy Sarkar, Prachi Prajapati & Athul Dileep, «Optical Polarisation Study of Galactic Open Clusters», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 93 - Année 2024, No 2 - Proceeedings of the 3rd BINA Workshop on the Scientific Potential of the Indo-Belgian Cooperation, 155-169 URL : https://popups.uliege.be/0037-9565/index.php?id=11636.

Over : Namita Uppal

Astronomy and Astrophysics division, Physical Research Laboratory, Ahmedabad-380009,India and Department of Physics, Indian Institute of Technology, Gandhinagar-382355, India. Corresponding author: namita@prl.res.in, namita.uppal@iitgn.ac.in

Over : Shashikiran Ganesh

Astronomy and Astrophysics division, Physical Research Laboratory, Ahmedabad-380009,India

Over : Santosh Joshi

Aryabhatta Research Institute of Observational Sciences, Manora Peak, Nainital-263001, India

Over : Mrinmoy Sarkar

Aryabhatta Research Institute of Observational Sciences, Manora Peak, Nainital-263001, India

Over : Prachi Prajapati

Astronomy and Astrophysics division, Physical Research Laboratory, Ahmedabad-380009,India

Over : Athul Dileep

Aryabhatta Research Institute of Observational Sciences, Manora Peak, Nainital-263001, India