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相关论文: Optical polarimetric study of open clusters: Distr…

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We present multiwavelength linear polarimetric observations of 104 stars towards the region of young open cluster NGC 6823. The polarization towards NGC 6823 is dominated by foreground dust grains and we found the evidence for the presence…

星系天体物理 · 物理学 2015-05-14 Biman J. Medhi , Maheswar. G , J. C. Pandey , Motohide Tamura , Ram Sagar

We present multiwavelength optical linear polarimetric observations of 69 stars toward the young open cluster Be 59. The observations reveal the presence of three dust layers located at the distances of \sim300, \sim500 and \sim700 pc. The…

太阳与恒星天体物理 · 物理学 2015-05-30 C. Eswaraiah , A. K. Pandey , G. Maheswar , W. P. Chen , D. K. Ojha , H. C. Chandola

We present multi-wavelength linear polarimetric observations for 44 stars of the NGC 1893 young open cluster region along with V-band polarimetric observations of stars of other four open clusters located between l ~160 to ~175 degree. We…

太阳与恒星天体物理 · 物理学 2015-05-20 C. Eswaraiah , A. K. Pandey , G. Maheswar , Biman J. Medhi , J. C. Pandey , D. K. Ojha , W. P. Chen

Multi-band linear polarimetric observations of 125 stars in the region of the cluster NGC 1817 have been carried out intending to study properties of interstellar dust and grains in that direction. The polarization is found to be…

太阳与恒星天体物理 · 物理学 2020-11-18 Sadhana Singh , Jeewan C. Pandey

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…

星系天体物理 · 物理学 2023-11-17 Namita Uppal , Shashikiran Ganesh , Santosh Joshi , Mrinmoy Sarkar , Prachi Prajapati , Athul Dileep

We present the optical linear polarization observation of stars towards the core of the Czernik 3 cluster in the Sloan i-band. The data were obtained using the EMPOL instrument on the 1.2 m telescope at Mount Abu Observatory. We study the…

星系天体物理 · 物理学 2022-07-12 Namita Uppal , Shashikiran Ganesh , D. Bisht

We present polarimetric observations in the UBVRI bands of 72 stars located in the direction of the medium age open cluster NGC 5617. Our intention is to use polarimetry as a tool membership identification, by building on previous…

星系天体物理 · 物理学 2015-05-18 Ana Maria Orsatti , Carlos Feinstein , M. Marcela Vergne , Ruben E. Martinez , E. Irene Vega

Our objective is to investigate the distribution of dust and associated large-scale structures of the Galaxy using optical linear polarization measurements of various open clusters located at different distances in the Galactic anticenter…

星系天体物理 · 物理学 2024-10-02 Namita Uppal , Shashikiran Ganesh , Vincent Pelgrims , Santosh Joshi , Mrinmoy Sarkar

We present optical photometric and polarimetric observations of stars towards NGC 1931 with the aim to derive the cluster parameters such as distance, reddening, age and luminosity/mass function as well as to understand the dust properties…

太阳与恒星天体物理 · 物理学 2015-06-12 A. K. Pandey , C. Eswaraiah , Saurabh Sharma , M. R. Samal , N. Chauhan , W. P. Chen , J. Jose , D. K. Ojha , Ram Kesh Yadav , H. C. Chandola

Using the imaging polarimeter for the Submillimeter Common User Bolometric Array at the James Clerk Maxwell Telescope, we have detected polarized thermal emission at 850 micron from dust toward three star-forming core systems in the Orion B…

天体物理学 · 物理学 2009-11-07 B. C. Matthews , J. D. Fiege , G. H. Moriarty-Schieven

Dust polarisation observations at optical wavelengths help understand the dust grain properties and trace the plane-of-the-sky component of the magnetic field. In this study, we make use of published optical polarisation data acquired with…

星系天体物理 · 物理学 2024-04-02 N. Bijas , Chakali Eswaraiah , Panigrahy Sandhyarani , Jessy Jose , Maheswar Gopinathan

Several sets of data show that small interstellar grains captured in interstellar magnetic fields draped over the heliosphere appear to polarize the light of nearby stars. The maximum polarization direction is offset in ecliptic longitude…

天体物理学 · 物理学 2007-05-23 Priscilla C. Frisch

Optical stellar polarimetry in the Perseus molecular cloud direction is known to show a fully mixed bi-modal distribution of position angles across the cloud (Goodman et al. 1990). We study the Gaia trigonometric distances to each of these…

Using starlight polarization, we present the properties of foreground dust towards cluster NGC 7380 embedded in H{\sc ii} region Sh 2-142. Observations of starlight polarization are carried out in four filters using an imaging polarimeter…

Polarized dust emission is a key tracer in the study of interstellar medium and of star formation. The observed polarization, however, is a product of magnetic field structure, dust grain properties and grain alignment efficiency, as well…

We present results from a joint ALMA-HST study of the nearby spiral galaxy NGC 628. We combine the HST LEGUS database of over 1000 stellar clusters in NGC 628 with ALMA Cycle 4 millimeter/submillimeter observations of the cold dust…

星系天体物理 · 物理学 2019-11-06 J. A. Turner , D. A. Dale , A. Adamo , D. Calzetti , K. Grasha , E. K. Grebel , K. E. Johnson , J. C. Lee , L. J. Smith , I. Yoon

We present linear polarization in the V band for 77 stars in the field of the globular cluster 47 Tucanae (NGC 104), and for 14 bright-star-free regions, located along an elliptical isophotal contour of the cluster, as well as UBVRI…

We have investigated the grain alignment and dust properties towards the direction of the cluster NGC 2345 using the multi-band optical polarimetric observations. For the majority of the stars, the observed polarization is found to be due…

星系天体物理 · 物理学 2022-06-01 Sadhana Singh , Jeewan C. Pandey , Thiem Hoang

We present submillimeter polarimetry at 850 micron toward the filamentary star-forming region associated with the reflection nebulosity NGC 2068 in Orion B. These data were obtained using the James Clerk Maxwell Telescope's SCUBA…

天体物理学 · 物理学 2009-11-07 B. C. Matthews , C. D. Wilson

Context. The polarized thermal emission from interstellar dust offers a valuable tool for probing both the dust and the magnetic field in the interstellar medium (ISM). However, existing observations only yield the total amount of dust…

星系天体物理 · 物理学 2026-01-14 Katia Ferrière , Ludovic Montier , Jean-Sébastien Carrière
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