본문 바로가기
HOME> 논문 > 논문 검색상세

논문 상세정보

POLARIZATION OF FIR EMISSION FROM T TAURI DISKS

Cho, Jung-Yeon   (Dept. of Astronomy & Space Science, Chungnam National Univ.  ); Lazarian, A.   (Astronomy Dept., Univ. of Wisconsin  );
  • 초록

    Recently far infra-red (FIR) polarization of the $850{\mu}m$ continuum emission from T Tauri disks has been detected. The observed degree of polarization is around 3 %. Since thermal emission from dust grains dominates the spectral energy distribution at the FIR regime, dust grains might be the cause of the polarization. We explore alignment of dust grains by radiative torque in T Tauri disks and provide predictions for polarized emission for disks viewed at different wavelengths and viewing angles. In the presence of magnetic field, these aligned grains produce polarized emission in infrared wavelengths. When we take a Mathis-Rumpl-Nordsieck-type distribution with maximum grain size of $500-1000{\mu}m$ , the degree of polarization is around 2-3 % level at wavelengths larger than ${\sim}100{\mu}m$ . Our study indicates that multifrequency infrared polarimetric studies of protostellar disks can provide good insights into the details of their magnetic structure.


  • 주제어

    accretion .   accretion disks .   circumstellar matter .   polarization .   stars:pre-main-sequence .   dust .   extinction.  

  • 참고문헌 (23)

    1. ?Chiang, E., & Goldreich, P. 1997, Spectral energy distributions of T Tauri stars with passive circumstellar disks, ApJ, 490, 368 
    2. ?Chiang, E., & Goldreich, P. 1999, Spectral energy distributions of passive T Tauri disks: Inclination, ApJ, 519, 279 
    3. ?Chiang, E., Joung, Mo, Creech-Eakman, Mo, Qi, Co, Kessler, J., Blake, Go, & van Dishoeck, E. 2001, Spectral energy distributions of passive T Tauri and Herbig Ae disks: Grain mineralogy, parameter dependences, and comparison with Infrared Space Observatory LWS observations, ApJ, 547, 1077 (COl) 
    4. ?Cho, J., & Lazarian, A. 2005, Grain alignment by radiation in dark clouds and cores, ApJ, 631, 361 
    5. ?Cho, J., & Lazarian, A. 2007, Grain alignment and polarized emission from magnetized T Tauri disks, ApJ, 669,1085 
    6. ?Dolginov A. Z. 1972, Orientation of interstellar and interplanetary grains, Ap&SS, 18, 337 
    7. ?Dolginov A. Z., & Mitrophanov, LG. 1976, Orientation of cosmic dust grains, Ap&SS, 43, 291 
    8. ?Draine, B. 1985, Tabulated optical properties of graphite and silicate grains, ApJS, 57, 587 
    9. ?Draine, B., & Flatau, P. 1994, J. Opt. Soc. Am. A, 11, 1491 
    10. ?Draine, B., & Lee, H. 1984, Optical properties of interstellar graphite and silicate grains, ApJ, 285, 89 
    11. ?Draine, B., & Weingartner, J. 1996, Radiative torques on interstellar grains. 1. Superthermal spin-up, ApJ, 470, 551 
    12. ?Draine, B., & Weingartner, J. 1997, Radiative torques on interstellar grains. II. grain alignment, ApJ, 480, 633 
    13. ?Gammie, C. 1996, Linear theory of magnetized, viscous, self-gravitating gas disks, ApJ, 462, 725 
    14. ?Greaves, J., Holland, W., Jenness, T., & Hawarden, T. 2000, Magnetic field surrounding the starburst nucleus of the galaxy M82 from polarized dust emission, Nature, 404, 732 
    15. ?Hall, J. 1949, Observations of the Polarized Light from Stars, Science, 109, 166 
    16. ?Hiltner, W. 1949, Polarization of light from distant stars by interstellar medium, Science, 109, 165 
    17. ?Hoang, T., & Lazarian, A. 2007, ApJ, submitted 
    18. ?Lazarian, A., & Hoang, T. 2007, MNRAS, in press 
    19. ?Laor, A., & Draine, B. 1993, Spectroscopic constraints on the properties of dust in active galactic nuclei, ApJ, 402, 441 
    20. ?Novak, G. et al. 2004, in Millimeter and Submillimeter Detectors for Astronomy II, eds. J. Antebi, & D. Lemke, Proceedings of the SPIE, Vol. 5498, p. 278 
    21. ?Tamura, M., Hough, J., Greaves, J., Morino, J.-I., Chrysostomou, A., Holland, W., & Momose, M. 1999, First detection of submillimeter polarization from T Tauri stars, ApJ, 525, 832 
    22. ?Weingartner, J., & Draine, B. 2001, Dust grain-size distributions and extinction in the milky way, large magellanic cloud, and small magellanic cloud, ApJ, 548, 296 
    23. ?Lazarian, A. 2007, Journal of Quantitative Spectroscopy and Radiative Transfer, 106, 225 

 활용도 분석

  • 상세보기

    amChart 영역
  • 원문보기

    amChart 영역

원문보기

무료다운로드
  • NDSL :
유료다운로드

유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.

원문복사신청을 하시면, 일부 해외 인쇄학술지의 경우 외국학술지지원센터(FRIC)에서
무료 원문복사 서비스를 제공합니다.

NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.

이 논문과 함께 출판된 논문 + 더보기