Ýçindekiler
Görüntüler
Resim Yükleyin
DSS Images Other Images
Ýlgili Makaleler
Optical Spectropolarimetry of SN 2002ap: A High-Velocity Asymmetric Explosion
We present spectropolarimetry of the Type Ic supernova SN 2002ap andgive a preliminary analysis: the data were taken at two epochs, close toand 1 month later than the visual maximum (2002 February 8). Inaddition, we present June 9 spectropolarimetry without analysis. Thedata show the development of linear polarization. Distinct polarizationprofiles were seen only in the O I λ7773 multiplet/Ca II IRtriplet absorption trough at maximum light and in the O I λ7773multiplet and Ca II IR triplet absorption troughs a month later, withthe latter showing a peak polarization as high as ~2%. The intrinsicpolarization shows three clear position angles: 80° for the Februarycontinuum, 120° for the February line feature, and 150° for theMarch data. We conclude that there are multiple asymmetric components inthe ejecta. We suggest that the supernova has a bulk asymmetry with anaxial ratio projected on the sky that is different from 1 by an order of10%. Furthermore, we suggest very speculatively that a high-velocityejecta component moving faster than ~0.115c (e.g., a jet) contributes topolarization in the February epoch. Based on data obtained at the SubaruTelescope, which is operated by the National Astronomical Observatory ofJapan (NAOJ).
|
Yeni bir Makale Öner
Ýlgili Baðlantýlar
Yeni Bir Baðlantý Öner
sonraki gruplarýn üyesi:
|
Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Baliklar |
| Sað Açýklýk: | 01h28m06.01s |
| Yükselim: | +06°01'11.3" |
| Görünürdeki Parlaklýk: | 10.078 |
| özdevim Sað Açýklýk: | -5.4 |
| özdevim Yükselim: | -17.2 |
| B-T magnitude: | 10.413 |
| V-T magnitude: | 10.106 |
Kataloglar ve belirtme:
|
INHABITED SKY
