تاو نهنگ

تاو نهنگ (τ Cet / τ Ceti, ˌtaʊ ˈsi:taɪ) یک ستاره در صورت فلکی نهنگ است که از لحاظ جرم و رده طیفی مشابه خورشید است؛ و فقط زیر ۱۲ سال نوری از سامانه خورشیدی فاصله دارد.

**تاو نهنگ**
اطلاعات رصدی مبدا J2000 اعتدال J2000
مکان تاو نهنگ (مرکز) در صورت فلکی نهنگ.
صورت فلکی	نهنگ
بعد	01^h 44^m 04.0829^s[1]
میل	‏ 14.928″ 56′ ‎−15°[1]
قدر ظاهری (V)	3.50[1]
مشخصات
رده	G8 V[1]
راهنمای رنگ U-B	+0.22[1]
راهنمای رنگ B-V	+0.72[1]
اخترسنجی

سرعت شعاعی (R_v)	−16.4[1] km/s
حرکت مخصوص (μ)	RA: −1721.94[1] mas/yr Dec.: 854.17[1] mas/yr
اختلاف منظر (π)	۲۷۴٫۱۸ ± ۰٫۸۰[1] mas
قدر مطلق (M_V)	5.69[2]

جزئیات

جرم	۰٫۸۱ M_☉
شعاع	۰٫۸۱۶±0.013[3] R_☉
گرانش سطحی (لگاریتم g)	4.4[4]
درخشندگی	۰٫۵۹ L_☉
دما	۵٬۳۴۴ ± 50[5] K
فلزات	22–74%[4][6]
چرخش	34 days[7]
سن	~۱٫۰ × 10¹⁰[3] سال

نام‌گذاری‌های دیگر
Durre Menthor, 52 Ceti, HD 10700, HR 509, BD-16°۲۹۵, GCTP 365.00, GJ 71, LHS 146, LTT 935, LFT 159, SAO 147986, LPM 84, FK5 59, HIP 8102.[1]

جستارهای وابسته

فهرست ستارگان نزدیک

منابع

"SIMBAD Query Result: HD 10700 -- High proper-motion Star", Centre de Données astronomiques de Strasbourg Retrieved on 2007-08-14.
For apparent magnitude m and parallax π, the absolute magnitude M_v is given by:
${\begin{smallmatrix}M_{v}\ =\ m+5(\log _{10}{\pi }+1)\ =\ 3.50+5(\log _{10}{0.27418}+1)\ =\ 5.69\end{smallmatrix}}$
See: Tayler, ‎Roger John (1994), The Stars: Their Structure and Evolution, Cambridge University Press, p. 16, ISBN 0-521-45885-4
Di Folco, E. ; Thévenin, F. ; Kervella, P. ; Domiciano de Souza, A. ; du Foresto, V. Coudé; Ségransan, D. ; Morel, P. (2004), "VLTI near-IR interferometric observations of Vega-Like Stars", Astronomy and Astrophysics, 426, p. 601–617, ISSN doi: [http://dx.doi.org/10.1051%2F0004-6361%3A20047189 {{جا:#tag:nowiki|10.1051/0004-6361:20047189}} [[Digital object identifier|doi]]: [http://dx.doi.org/10.1051%2F0004-6361%3A20047189 {{جا:#tag:nowiki|10.1051/0004-6361:20047189}}]] Check |issn= value (help) Retrieved on 2007-08-14.
de Strobel, G. Cayrel; Hauck, B. ; Francois, P. ; Thevenin, F. ; Friel, E. ; Mermilliod, M. ; Borde, S. (1991), "A catalogue of Fe/H determinations - 1991 edition", Astronomy and Astrophysics Supplement Series, 95 (2), p. 273–336 Retrieved on 2007-08-14.
Santos, N. C. ; Israelian, G. ; García López, R. J. ; Mayor, M. ; Rebolo, R. ; Randich, S. ; Ecuvillon, A. ; Domínguez Cerdeña, C. (2004), "Are beryllium abundances anomalous in stars with giant planets?", Astronomy and Astrophysics, 427, p. 1085–1096, ISSN doi: [http://dx.doi.org/10.1051%2F0004-6361%3A20040509 {{جا:#tag:nowiki|10.1051/0004-6361:20040509}} [[Digital object identifier|doi]]: [http://dx.doi.org/10.1051%2F0004-6361%3A20040509 {{جا:#tag:nowiki|10.1051/0004-6361:20040509}}]] Check |issn= value (help) Retrieved on 2007-02-26.
Flynn, C. ; Morell, O. (1997), "Metallicities and kinematics of G and K dwarfs", Monthly Notices of the Royal Astronomical Society, 286 (3), p. 617–625 Retrieved on 2007-08-14.
Baliunas, S. ; Sokoloff, D. ; Soon, W. (1996), "Magnetic Field and Rotation in Lower Main-Sequence Stars: an Empirical Time-dependent Magnetic Bode's Relation?", Astrophysical Journal Letters, 457, p. L99, ISSN doi: [http://dx.doi.org/10.1086%2F309891 {{جا:#tag:nowiki|10.1086/309891}} [[Digital object identifier|doi]]: [http://dx.doi.org/10.1086%2F309891 {{جا:#tag:nowiki|10.1086/309891}}]] Check |issn= value (help) Retrieved on 2007-08-14.

پیوند به بیرون

Nearby Stars Database
Tau Ceti at Jim Kaler's STARS site
Tau Ceti: Life Amidst Catastrophe? at Centauri Dreams

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[SIMBAD-1] "SIMBAD Query Result: HD 10700 -- High proper-motion Star", Centre de Données astronomiques de Strasbourg Retrieved on 2007-08-14.

[abs_mag-2] For apparent magnitude m and parallax π, the absolute magnitude M_v is given by:
${\begin{smallmatrix}M_{v}\ =\ m+5(\log _{10}{\pi }+1)\ =\ 3.50+5(\log _{10}{0.27418}+1)\ =\ 5.69\end{smallmatrix}}$
See: Tayler, ‎Roger John (1994), The Stars: Their Structure and Evolution, Cambridge University Press, p. 16, ISBN 0-521-45885-4

[aa426-3] Di Folco, E. ; Thévenin, F. ; Kervella, P. ; Domiciano de Souza, A. ; du Foresto, V. Coudé; Ségransan, D. ; Morel, P. (2004), "VLTI near-IR interferometric observations of Vega-Like Stars", Astronomy and Astrophysics, 426, p. 601–617, ISSN doi: [http://dx.doi.org/10.1051%2F0004-6361%3A20047189 {{جا:#tag:nowiki|10.1051/0004-6361:20047189}} [[Digital object identifier|doi]]: <span class="neverexpand">[http://dx.doi.org/10.1051%2F0004-6361%3A20047189 {{جا:#tag:nowiki|10.1051/0004-6361:20047189}}]</span>] Check |issn= value (help) Retrieved on 2007-08-14.

[strobel-4] Strobel, G. Cayrel; Hauck, B. ; Francois, P. ; Thevenin, F. ; Friel, E. ; Mermilliod, M. ; Borde, S. (1991), "A catalogue of Fe/H determinations - 1991 edition", Astronomy and Astrophysics Supplement Series, 95 (2), p. 273–336 Retrieved on 2007-08-14.

[5] Santos, N. C. ; Israelian, G. ; García López, R. J. ; Mayor, M. ; Rebolo, R. ; Randich, S. ; Ecuvillon, A. ; Domínguez Cerdeña, C. (2004), "Are beryllium abundances anomalous in stars with giant planets?", Astronomy and Astrophysics, 427, p. 1085–1096, ISSN doi: [http://dx.doi.org/10.1051%2F0004-6361%3A20040509 {{جا:#tag:nowiki|10.1051/0004-6361:20040509}} [[Digital object identifier|doi]]: <span class="neverexpand">[http://dx.doi.org/10.1051%2F0004-6361%3A20040509 {{جا:#tag:nowiki|10.1051/0004-6361:20040509}}]</span>] Check |issn= value (help) Retrieved on 2007-02-26.

[mnras286-6] Flynn, C. ; Morell, O. (1997), "Metallicities and kinematics of G and K dwarfs", Monthly Notices of the Royal Astronomical Society, 286 (3), p. 617–625 Retrieved on 2007-08-14.

[ApJL457-7] Baliunas, S. ; Sokoloff, D. ; Soon, W. (1996), "Magnetic Field and Rotation in Lower Main-Sequence Stars: an Empirical Time-dependent Magnetic Bode's Relation?", Astrophysical Journal Letters, 457, p. L99, ISSN doi: [http://dx.doi.org/10.1086%2F309891 {{جا:#tag:nowiki|10.1086/309891}} [[Digital object identifier|doi]]: <span class="neverexpand">[http://dx.doi.org/10.1086%2F309891 {{جا:#tag:nowiki|10.1086/309891}}]</span>] Check |issn= value (help) Retrieved on 2007-08-14.