eprintid: 10095235
rev_number: 14
eprint_status: archive
userid: 608
dir: disk0/10/09/52/35
datestamp: 2020-04-30 09:23:34
lastmod: 2021-11-29 00:15:04
status_changed: 2020-04-30 09:23:34
type: article
metadata_visibility: show
creators_name: Hales, AS
creators_name: Gledhill, TM
creators_name: Barlow, MJ
creators_name: Lowe, KTE
title: Near-infrared imaging polarimetry of dusty young stars
ispublished: pub
divisions: UCL
divisions: B04
divisions: C06
divisions: F60
keywords: techniques: polarimetric, circumstellar matter, stars: evolution, planetary systems: protoplanetary discs, infrared: stars
Introduction
note: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
abstract: We have carried out JHK polarimetric observations of 11 dusty young stars, by using the polarimeter module IRPOL2 with the near-infrared camera UIST on the 3.8-m United Kingdom Infrared Telescope (UKIRT). Our sample targeted systems for which UKIRT-resolvable discs had been predicted by model fits to their spectral energy distributions. Our observations have confirmed the presence of extended polarized emission around TW Hya and around HD 169142. HD 150193 and HD 142666 show the largest polarization values among our sample, but no extended structure was resolved. By combining our observations with Hubble Space Telescope (HST) coronographic data from the literature, we derive the J- and H-band intrinsic polarization radial dependences of the disc of TW Hya. We find the polarizing efficiency of the disc is higher at H than at J, and we confirm that the J- and H-band percentage polarizations are reasonably constant with radius in the region between 0.9 and 1.3 arcsec from the star. We find that the objects for which we have detected extended polarizations are those for which previous modelling has suggested the presence of flared discs, which are predicted to be brighter than flat discs and thus would be easier to detect polarimetrically.
date: 2006-02
date_type: published
publisher: WILEY-BLACKWELL
official_url: https://doi.org/10.1111/j.1365-2966.2005.09820.x
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 243874
doi: 10.1111/j.1365-2966.2005.09820.x
lyricists_name: Barlow, Michael
lyricists_id: MJBAR75
actors_name: Barlow, Michael
actors_id: MJBAR75
actors_role: owner
full_text_status: public
publication: Monthly Notices of the Royal Astronomical Society
volume: 365
number: 4
pagerange: 1348-1356
pages: 9
issn: 0035-8711
citation:        Hales, AS;    Gledhill, TM;    Barlow, MJ;    Lowe, KTE;      (2006)    Near-infrared imaging polarimetry of dusty young stars.                   Monthly Notices of the Royal Astronomical Society , 365  (4)   pp. 1348-1356.    10.1111/j.1365-2966.2005.09820.x <https://doi.org/10.1111/j.1365-2966.2005.09820.x>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10095235/1/hales06_pol.pdf