High-resolution polarimetry of Parsamian 21

Revealing the structure of an edge-on FU Ori disc

Á Kóspál, P. Ábrahám, Daniel Apai, D. R. Ardila, C. A. Grady, Th Henning, A. Juhász, D. W. Miller, A. Moór

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We present the first high spatial resolution near-infrared direct and polarimetric observations of Parsamian 21, obtained with the Nasmyth Adaptive Optics System-CONICA instrument at the Very Large Telescope (VLT). We complemented these measurements with archival infrared observations, such as Hubble Space Telescope (HST)/Wide Field Planetary Camera 2 (WFPC2) imaging, HST/Near Infrared Camera and Multi-Object Spectrometer (NICMOS) polarimetry, photometry with the Spitzer Space Telescope's Infrared Array Camera (IRAC) and Multiband Imaging Photometer (MIPS), spectroscopy with Spitzer's Infrared Spectrograph (IRS), as well as Infrared Space Observatory (ISO) photometry. Our main conclusions are as follows: (1) we argue that Parsamian 21 is probably an FU Orionis-type object (FUor); (2) Parsamian 21 is not associated with any rich cluster of young stars; (3) our measurements reveal a circumstellar envelope, a polar cavity and an edge-on disc; the disc seems to be geometrically flat and extends from approximately 48 to 360 au from the star; (4) the spectral energy distribution (SED) can be reproduced with a simple model of a circumstellar disc and an envelope; (5) within the framework of an evolutionary sequence of FUors proposed by Green et al. and Quanz et al., Parsamian 21 can be classified as an intermediate-aged object.

Original languageEnglish (US)
Pages (from-to)1015-1028
Number of pages14
JournalMonthly Notices of the Royal Astronomical Society
Volume383
Issue number3
DOIs
StatePublished - Jan 2008

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polarimetry
cameras
Hubble Space Telescope
photometry
high resolution
envelopes
Infrared Space Observatory (ISO)
stars
near infrared
Space Infrared Telescope Facility
spectral energy distribution
adaptive optics
spectrographs
photometers
photometer
spatial resolution
telescopes
spectrometers
cavity
cavities

Keywords

  • Circumstellar matter
  • Infrared: stars
  • Stars: individual: Parsamian 21
  • Stars: pre-main sequence
  • Techniques: polarimetric

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

High-resolution polarimetry of Parsamian 21 : Revealing the structure of an edge-on FU Ori disc. / Kóspál, Á; Ábrahám, P.; Apai, Daniel; Ardila, D. R.; Grady, C. A.; Henning, Th; Juhász, A.; Miller, D. W.; Moór, A.

In: Monthly Notices of the Royal Astronomical Society, Vol. 383, No. 3, 01.2008, p. 1015-1028.

Research output: Contribution to journalArticle

Kóspál, Á, Ábrahám, P, Apai, D, Ardila, DR, Grady, CA, Henning, T, Juhász, A, Miller, DW & Moór, A 2008, 'High-resolution polarimetry of Parsamian 21: Revealing the structure of an edge-on FU Ori disc', Monthly Notices of the Royal Astronomical Society, vol. 383, no. 3, pp. 1015-1028. https://doi.org/10.1111/j.1365-2966.2007.12557.x
Kóspál, Á ; Ábrahám, P. ; Apai, Daniel ; Ardila, D. R. ; Grady, C. A. ; Henning, Th ; Juhász, A. ; Miller, D. W. ; Moór, A. / High-resolution polarimetry of Parsamian 21 : Revealing the structure of an edge-on FU Ori disc. In: Monthly Notices of the Royal Astronomical Society. 2008 ; Vol. 383, No. 3. pp. 1015-1028.
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AU - Ardila, D. R.

AU - Grady, C. A.

AU - Henning, Th

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