Browse > Article
http://dx.doi.org/10.5303/JKAS.2015.48.5.267

KVN MONITORING OBSERVATIONS TOWARD THE RECENT OUTBURST SYMBIOTIC STAR V407 CYGNI  

CHO, SE-HYUNG (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
KIM, JAEHEON (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
YUN, YOUNGJOO (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Publication Information
Journal of The Korean Astronomical Society / v.48, no.5, 2015 , pp. 267-275 More about this Journal
Abstract
Simultaneous time monitoring observations of H2O and SiO maser lines were performed toward the D-type symbiotic binary system V407 Cyg with the Korean VLBI Network single dish radio telescope. These monitoring observations were carried out from March 2, 2010 (optical phase ϕ = 0.0), 8 days before the nova outburst on March 10, 2010 to June 5, 2014 (ϕ = 2.13). Eight days before the nova outburst, we detected the SiO v = 1, 2, J = 1–0 maser lines which exhibited values of 0.51 K (∼ 6.70 Jy) and 0.71 K (∼ 9.30 Jy), respectively, while after the outburst we could not detect them on April 2 (ϕ = 0.04), May 5 (ϕ = 0.09), May 8 (ϕ = 0.09), or on June 5, 2010 (ϕ = 0.13) within the upper limits of our KVN observations. After restarting our monitoring observations, we detected SiO v = 2, J = 1–0 masers starting on October 20, 2011 (ϕ = 0.83) and detected SiO v = 1, J = 1–0 masers starting on December 22, 2011 (ϕ = 0.92). These results provide clear evidence of the interaction between the shock from the nova outburst and the SiO maser regions of the Mira envelope. The peak emission of SiO v = 1, 2, J = 1–0 masers always occurred at blueshifted velocities with respect to the stellar velocity except for that of SiO v = 1 at one epoch. These phenomena may be related to the redistribution of SiO maser regions after the outburst. The peak velocity variations of SiO masers associated with stellar pulsation phases show an increasing blueshifted trend during our monitoring interval after the outburst.
Keywords
circumstellar matter; masers; radio lines: stars; symbiotic star;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Langer, S. H., & Watson, W. D. 1984, Theory of Astrophysical SiO Masers, ApJ, 284, 751   DOI
2 Maehara, H., Hirosawa, K., & Kabashima, F. 2010, V407 Cygni, Cent. Bureau Electron., 2199, 1
3 Morris, M. 1987, Mechanisms for Mass Loss from Cool Stars, PASP, 99, 1115   DOI
4 Munari, U., Joshi, V. H., Ashok, N. M., et al. 2011, The 2010 Nova Outburst of the Symbiotic Mira V407 Cyg, MNRAS, 410, L52   DOI
5 Munari, U., Margoni, R., & Stagni, R. 1990, The Extreme, Possible Symbiotic Mira V 407 Cyg and its Relevance to the OH/IR Sources, MNRAS, 242, 653   DOI
6 Nakashima, J., & Deguchi, S. 2003, SiO Maser Survey of Cold IRAS Sources, PASJ, 55, 229   DOI
7 Nelson, T., Donato, D., Mukai, K., Sokoloski, J., & Chomiuk, L. 2012, X-Ray Emission from an Asymmetric Blast Wave and a Massive White Dwarf in the Gamma-Ray Emitting Nova V407 Cyg, ApJ, 748, 43   DOI
8 Ramstedt, S., Vlemmings, W., Humphreys, E., & Alves, F. 2012, Shooting Stars, Masers from Red Giants, in Proc. IAU Symp. 287, Cosmic Masers-From OH to H0, ed. R.S. Booth, E.M.L. Humphreys, & W.H.T. Vlemmings (Cambridge: Cambridge Univ. Press), 292
9 Shore, S. N., Wahlgren, G. M., Augusteijin, T., et al. 2011, The Spectroscopic Evolution of the Symbiotic-like Recurrent Nova V407 Cygni during its 2010 Outburst. I. The Shock and its Evolution, A&A, 527, 98
10 Yoon, D.-H., Cho, S.-H., Kim, J., Yun, Y. J., & Park, Y.-S. 2014, SiO and H2O Maser Survey toward Post-Asymptotic Giant Branch and Asymptotic Giant Branch Stars, ApJS, 211, 15   DOI
11 Cho, S.-H., Kim, J., & Yun, Y. 2014, First Detection of 22 GHz H2O Masers in TX Camelopardalis, JKAS, 47, 293
12 Chomiuk, L., Krauss, M. I., Rupen, M. P., et al. 2012, The Radio Light Curve of the Gamma-Ray Nova in V407 Cyg: Thermal Emission from the Ionized Symbiotic Envelope, Devoured from within by the Nova Blast, ApJ, 761, 173   DOI
13 Deguchi, S., Koike, K., Kuno, N., Matsunaga, N., Nakashima, J., & Takahashi, S. 2011, SiO Maser Spectra of V407 Cygni after the 2010 March Nova Outburst, PASJ, 63, 309   DOI
14 Deguchi, S., Nakashima, J.,Miyata, T., & Ita, Y. 2005, Observations of Stellar Maser Sources with No IRAS Counterpart, PASJ, 57, 933   DOI
15 Giroletti, M., Koerding, E., Corbel, S., et al. 2010, VLBI detection of V407 Cyg, ATel, 2536, 1
16 Han, S.-T., Lee, J.-W., Kang, J., et al. 2008, Millimeterwave Receiver Optics for Korean VLBI Network, Int. J Infrared Milli Waves, 29, 69   DOI
17 Han, S.-T., Lee, J.-W., Kang, J., et al. 2013, Korean VLBI Network Receiver Optics for Simultaneous Multifrequency Observation: Evaluation, PASP, 125, 539   DOI
18 Iijima, T. 2015, New Features of the Symbiotic Recurrent Nova V407 Cygni Found in the Outburst in 2010, AJ, 150, 20   DOI
19 Imai, H., Nakashima, J., Diamond, P. J., Miyazaki, A., & Deguchi, S. 2005, A Biconically Expanding Flow in W43A Traced by SiO Maser Emission, ApJ, 622, L125   DOI
20 Joshi, V., Ashok, N. M., & Banerjee, D. P. K. 2010, V407 Cygni, CBET, 2210, 1J
21 Boboltz, D. A., & Diamond, P. J. 2005, Axial Symmetry and Rotation in the SiO Maser Shell of IK Tauri, ApJ, 625, 978   DOI
22 Kim, J., Cho, S.-H., Oh, C. S., & Byun, D.-Y. 2010, Simultaneous Observations of SiO and H2O Masers toward Known Stellar SiO and H2O Maser Sources, ApJS, 188, 209   DOI
23 Abdo, A. A., Ackermann, M., Ajello, M., et al. 2010, Gamma-Ray Emission Concurrent with the Nova in the Symbiotic Binary V407 Cygni, Science, 329, 817   DOI
24 Benson, P. J., & Little-Marenin, I. R. 1996, Water Masers Associated with Circumstellar Shells, ApJS, 106, 579   DOI
25 Bower, G. C., Forster, R., & Cheung, C. C. 2010, V407 Cyg: Allen Telescope Array Observations, ATel, 2529, 1
26 Cho, S.-H., & Kim, J. 2010, Simultaneous Observations of SiO and H2O Masers toward Symbiotic Stars, ApJ, 719, 126   DOI
27 Cho, S.-H., & Kim, J. 2012, Simultaneous Observations of SiO and H2O Masers toward Known Stellar SiO Maser Sources, AJ, 144, 129   DOI