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| Content Provider | Springer Nature Link |
|---|---|
| Author | Waniak, W. Borisov, G. Drahus, M. Bonev, T. Czart, K. Küppers, M. |
| Copyright Year | 2009 |
| Abstract | We present preliminary results of the narrow-band CN observations of comet 8P/Tuttle from early January 2008, realized as part of a project consisting of near-simultaneous spectroscopic monitoring of HCN at millimeter-wavelengths and optical imaging of the coma. The mean-image subtraction method revealed low-contrast CN envelopes. Using the image cross-correlation technique we measured the projected velocity of these shells. For the sunward part we found it to be equal to 0.96 ± 0.03 km s$^{−1}$ on January 4 and 1.10 ± 0.01 km s$^{−1}$ on January 9, whereas the anti-sunward part reached 0.73 ± 0.05 and 0.80 ± 0.02 km s$^{−1}$, respectively. The periodicity of gas emission was investigated using a repeatability of the shells, their kinematics, and an aperture photometry of the near nucleus region. We found a period of 5.70 ± 0.07 h (along with multiples), consistent with previous findings by other authors. A toy Monte Carlo model was implemented to reproduce the time-series of the CN images. We show that emission of HCN into a relatively wide cone by a single active region on a rotating nucleus is the most probable scenario. |
| Starting Page | 327 |
| Ending Page | 342 |
| Page Count | 16 |
| File Format | |
| ISSN | 01679295 |
| Journal | Earth, Moon, and Planets |
| Volume Number | 105 |
| Issue Number | 2-4 |
| e-ISSN | 15730794 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2009-06-18 |
| Publisher Place | Dordrecht |
| Access Restriction | Subscribed |
| Subject Keyword | Comets Comet 8P/Tuttle CN coma Gas emission Nucleus rotation Astrophysics Extraterrestrial Physics, Space Sciences Planetology Astronomy |
| Content Type | Text |
| Resource Type | Article |
| Subject | Astronomy and Astrophysics Space and Planetary Science |
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