Academic Journal
Constraining the Age and Distance of the Galactic Supernova Remnant G156.2+5.7 by H A Expansion Measurements
| العنوان: | Constraining the Age and Distance of the Galactic Supernova Remnant G156.2+5.7 by H A Expansion Measurements |
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| المؤلفون: | Satoru Katsuda, Masaomi Tanaka, Tomoki Morokuma, Robert Fesen, Milisavljevic, Dan |
| المصدر: | Dartmouth Scholarship |
| بيانات النشر: | Dartmouth Digital Commons |
| سنة النشر: | 2016 |
| المجموعة: | Dartmouth Digital Commons (Dartmouth College) |
| مصطلحات موضوعية: | astrophysics, high energy astrophysical phenomena, Astrophysics and Astronomy, Physical Sciences and Mathematics, Stars, Interstellar Medium and the Galaxy |
| الوصف: | We present deep Hα images of portions of the X-ray bright, but optically faint, Galactic supernova remnant G156.2+5.7, revealing numerous and delicately thin non-radiative filaments, which mark the location of the remnant's forward shock. These new images show that these filaments have a complex structure not visible on previous lower resolution optical images. By comparing Hα images taken in 2004 at the McDonald Observatory and in 2015–2016 at the Kiso Observatory, we set a stringent 1σ upper limit of expansion to be 0.06 arcsec/yr. This proper motion, combined with a shock speed of 500 km s−1, inferred from X-ray spectral analyses, gives a distance of > 1.7 kpc. In addition, a simple comparison of expansion indices of several supernova remnants allows us to infer the age of the remnant to be a few tens of thousands years old. These estimates are more straightforward and reliable than any other previous studies, and clearly rule out the possibility that G156.2+5.7 is physically associated with part of the Taurus–Auriga cloud and dust complex at a distance of 200–300 pc. |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | unknown |
| Relation: | https://digitalcommons.dartmouth.edu/facoa/2146; https://digitalcommons.dartmouth.edu/context/facoa/article/3150/viewcontent/1605.07271.pdf |
| DOI: | 10.3847/0004-637X/826/2/108 |
| الاتاحة: | https://digitalcommons.dartmouth.edu/facoa/2146 https://doi.org/10.3847/0004-637X/826/2/108 https://digitalcommons.dartmouth.edu/context/facoa/article/3150/viewcontent/1605.07271.pdf |
| رقم الانضمام: | edsbas.14CEE002 |
| قاعدة البيانات: | BASE |
| DOI: | 10.3847/0004-637X/826/2/108 |
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