Bull. Cent. Astron. Univ. Hyogo 3, (2015) VTOS 1 1 * Speckle observations of Betelgeuse and its neighbor stars using Visual Target Obser

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1 Bull. Cent. Astron. Univ. Hyogo 3, (2015) VTOS 1 1 * Speckle observations of Betelgeuse and its neighbor stars using Visual Target Observation System Noriaki Miura 1, Masato Yagi 1, Susumu Kuwamura 1, Fumiaki Tsumuraya 2, Makoto Sakamoto 3, and Naoshi Baba 4 1) Kitami Institute of Technology, 165 Koen-cho, Kitami, Hokkaido , Japan 2) Nishi-Harima Astronomical Observatory, Center for Astronomy, University of Hyogo, Sayo, Hyogo , Japan 3) Nenohoshi educational company 4) Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido , Japan miuranr@mail.kitami-it.ac.jp (Received 2015 Norvember 30) VTOS M K B Abstract We conducted speckle observations of Betelgeuse and its neighbor stars using the Visible Target Observation System at the Nishi-Harima Astronomical Observatory in January, We derived spatial-frequency power spectra of observed stars using the stellar speckle interferometory. A common feature is demonstrated in the power spectra of M- and K-type stars, being different from that of a B-type star. Key words: Speckle interferometory Betelgeuse spatial frequency power specterum * Present Affiliation: USE Co. 21

N. Miura et al. 1. Bonnueau & Labeyrie 1973, Lynds et al. 1976; Welter & Worden 1980; Balega et al. 1982; Cheng et al. 1986 Buscher et al. 1990; Wilson et al. 1992; Tuthill et al.

2 N. Miura et al. 1. Bonnueau & Labeyrie 1973, Lynds et al. 1976; Welter & Worden 1980; Balega et al. 1982; Cheng et al Buscher et al. 1990; Wilson et al. 1992; Tuthill et al nm nm 535nm Rotation Shearing Roddier & Roddier 1985 Visual Target Observation System (VTOS) ±10.5 nm 515W Figure 1(a) Figure 1(b) TiO 2014 TiO 506.3±3.8 nm 507N 518.9± N M K (a) (b) Fig. 1. Power spectra of Betelgeuse and Bellatrix, observed with the 515W filter in November, i(x, y) = o(x, y) p(x, y) (1) Labeyrie 1970 o(x, y), p(x, y) (PSF) * PSF 22

3 Speckle Observation of Betelgeuse < I(u, v) 2 >= O(u, v) 2 < P (u, v) 2 > (2) < P 2 > O 2 < I 2 > 3. Table Figure 2 (a)515w, (b)507n, (c)517n (d)515w, (e)507n, (f)517n 7-12 Figure 2(a) Figure 1(a) 507N 517N 515W Figure 2(b) (c) (a) TiO 517N Table 1. Observing log Object RA, Dec Magnitude Spectrum Observation Zenith Filter No. (J2000) type time (JST) angle(deg) HIP h 52 m M3Sv 22: W HIP h 35 m K5III 22: W 2 (Aldebaran) HIP h 32 m M2Ib 23: W HIP h 14 m M3III 23: W HIP h 22 m M3IIIver 23: W HIP h 47 m K4III 23: W HIP h 55 m M2Ib 23: W 7 (Betelgeuse) : N 8 23: N 9 HIP h 25 m B2III 23: W 10 (Bellatrix) : N 11 23: N 12 23

N. Miura et al. (a) (b) (c) (d) (e) (f) Fig. 2. Power spectra of Betelgeuse with the filters of (a) 515W, (b) 507N, (c) 517N and of Bellatrix with (d)515w, (e)507n, (f)517n, observed in January, 2015.

4 N. Miura et al. (a) (b) (c) (d) (e) (f) Fig. 2. Power spectra of Betelgeuse with the filters of (a) 515W, (b) 507N, (c) 517N and of Bellatrix with (d)515w, (e)507n, (f)517n, observed in January, They correspond to No.9-14 in Table 1, respectively. 515W Figure 2(d) Figure 1(b) Figure 2(d) Figure 1 Figure 2 515W K M Fig. 3(a)-(f) Table Figure 2(a) Fig. 3(b) Fig. 3(e)(f) 515W K M K M M K W VTOS ICCD 24

5 Speckle Observation of Betelgeuse (a) (b) (c) (d) (e) (f) Fig. 3. Power spectra of (a) HIP22667, (b) HIP21421 (Aldebaran) (c) HIP25945, (d) HIP29655, (e) HIP30343, (f) HIP32533, with the 515W filter.?? 25

6 N. Miura et al. 515nm 900nm EMCCD nm 20% cross term Figure 2(a) Fig nm 120 M K B 507N 517N 2015 Figure 2, Figure 1(a) µm plume Kervella et al VTOS 2012 Balega, Y., Blazit, A., Bonneau, D., Koechlin, L., Foy, R., and Labeyrie, A. 1982, A & A, 115, 253 Bonneau, D.,and Labeyrie, A., 1973, ApJ, 181, L1 Buscher, D. F., Haniff, C. A., Baldwin, J. E., and Warner, P. J. 1990, MNRAS, 245, 7 Cheng, A. Y. S., Hege, E. K., Hubbard E. N., Goldberg. L., Strittmatter, P. A., and Cocke, W. J. 1986, ApJ, 309, 737 Kervella, P., Verhoelst, T., Ridgway, S. T., Perrin, G., Lacour, S., Cami, J., Haubois, X. 2009, A & A, 504, 115 Labeyrie, A., 1970, A & A, 6, 85 Lynds, C. R., Worden, S. P., and Harvey, J. W., 1976, ApJ, 207, 174 Roddier, F., Roddier, C. 1985, ApJ, 295, L21 Tuthill P. G., Haniff, C. A., Baldwin, J. E. 1997, MNRAS, 285, 529 Welter, G. L., and Worden, S. P.,1980, ApJ, 242, 673 Wilson, R. W., Baldwin, J. E., Buscher, D. F., and Warner, P. J. 1992, MNRAS, 257,