巨蟹座VZ
巨蟹座VZ（英文：VZ Cancri）是一個位於巨蟹座的變星。其亮度變化周期為0.178364天，視星等從7.18降至7.91，[3]這低於肉眼可見的典型閾值。根據視差測量，這顆恆星距離我們大約724光年，且其徑向速度為每秒25公里，正在遠離太陽。[6]
| 觀測資料 曆元 J2000 | |
|---|---|
| 星座 | 巨蟹座 |
| 星官 | |
| 赤經 | 08h 40m 52.125s[2] |
| 赤緯 | +09° 49′ 27.15″[2] |
| 視星等（V） | 7.18 to 7.91[3] |
| 特性 | |
| 光譜分類 | F2 III[4] |
| B−V 色指數 | 0.288+0.020 −[5] |
| 變星類型 | δ Sct[3] |
| 天體測定 | |
| 徑向速度 (Rv) | 25.2+0.4 −[6] km/s |
| 自行 (μ) | 赤經：−29.005 mas/yr 赤緯：−15.856 mas/yr |
| 視差 (π) | 4.5062 ± 0.0268[2] mas |
| 距離 | 724 ± 4 ly (222 ± 1 pc) |
| 絕對星等 (MV) | 1.79[5] |
| 詳細資料 | |
| 質量 | 1.60[7] M☉ |
| 半徑 | 2.90[8] R☉ |
| 表面重力 (log g) | 3.4+0.2 −[4] |
| 亮度 | 15.96[5] L☉ |
| 溫度 | 6,909+219 −[7] K |
| 金屬量 [Fe/H] | −0.41[7] dex |
| 自轉速度 (v sin i) | 26+1 −[4] km/s |
| 年齡 | 1.70[7] Gyr |
| 其他命名 | |
| 參考資料庫 | |
| SIMBAD | 資料 |
這顆恆星於1950年由B. S. Whitney發現其亮度變化，並將其歸類為簇型造父變星，[10]或稱RR Lyrae型變星。[11]
參考資料
- ^ MAST: Barbara A. Mikulski Archive for Space Telescopes, Space Telescope Science Institute, [22 September 2022], （原始內容存檔於2023-03-27）.
- ^ 2.0 2.1 2.2 Brown, A. G. A.; et al. Gaia Early Data Release 3: Summary of the contents and survey properties. Astronomy & Astrophysics. 2021, 649: A1. Bibcode:2021A&A...649A...1G. S2CID 227254300. arXiv:2012.01533
. doi:10.1051/0004-6361/202039657 . 已忽略未知參數|collaboration=(幫助) (勘誤: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR. - ^ 3.0 3.1 3.2 Samus, N. N.; et al, General Catalogue of Variable Stars, Astronomy Reports, 5.1, 2017, 61 (1): 80–88, Bibcode:2017ARep...61...80S, S2CID 125853869, doi:10.1134/S1063772917010085.
- ^ 4.0 4.1 4.2 Kahraman Aliçavuş, F.; et al, High-resolution spectroscopy and abundance analysis of δ Scuti stars near the γ Doradus instability strip, Monthly Notices of the Royal Astronomical Society, October 2017, 470 (4): 4408–4420, Bibcode:2017MNRAS.470.4408K, arXiv:1706.04782 , doi:10.1093/mnras/stx1498.
- ^ 5.0 5.1 5.2 Anderson, E.; Francis, Ch., XHIP: An extended hipparcos compilation, Astronomy Letters, 2012, 38 (5): 331, Bibcode:2012AstL...38..331A, S2CID 119257644, arXiv:1108.4971 , doi:10.1134/S1063773712050015.
- ^ 6.0 6.1 Gontcharov, G. A., Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system, Astronomy Letters, November 2006, 32 (11): 759–771, Bibcode:2006AstL...32..759G, S2CID 119231169, arXiv:1606.08053 , doi:10.1134/S1063773706110065.
- ^ 7.0 7.1 7.2 7.3 Casagrande, L.; et al, New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey, Astronomy and Astrophysics, June 2011, 530: A138, Bibcode:2011A&A...530A.138C, S2CID 56118016, arXiv:1103.4651 , doi:10.1051/0004-6361/201016276.
- ^ Fernley, J. A.; et al, The radii and masses of dwarf cepheids, Monthly Notices of the Royal Astronomical Society, March 1987, 225 (2): 451–468, Bibcode:1987MNRAS.225..451F, doi:10.1093/mnras/225.2.451.
- ^ VZ Cnc. SIMBAD. 斯特拉斯堡天文資料中心.
- ^ Whitney, Balfour S., The Cluster-Type Cepheid HD 73857, Publications of the Astronomical Society of the Pacific, April 1950, 62 (364): 56, Bibcode:1950PASP...62...56W, S2CID 123297233, doi:10.1086/126228.
- ^ Joy, A. H.; Wilson, R. E., The Radial Velocity of HD 73857, Publications of the Astronomical Society of the Pacific, April 1950, 62 (364): 58, Bibcode:1950PASP...62...58J, S2CID 121064818, doi:10.1086/126229.
拓展閱讀
- Boonyarak, Chayan; et al, The period variation of the double mode high amplitude δ Scuti variable VZ Cnc, Astrophysics and Space Science, November 2009, 324 (1): 5–11, Bibcode:2009Ap&SS.324....5B, S2CID 53639708, doi:10.1007/s10509-009-0147-y.
- Arellano Ferro, A.; et al, On the Period Variation of the Delta Scuti Star VZ Cancri, Publications of the Astronomical Society of the Pacific, July 1994, 106 (701): 696, Bibcode:1994PASP..106..696A, S2CID 250876310, doi:10.1086/133432 .
- Arellano Ferro, A.; et al, Times of Light Maximum of VZ Cancri: 1994 Season, Information Bulletin on Variable Stars, June 1994, 4039: 1, Bibcode:1994IBVS.4039....1A.
- Cao, Ming; Jiang, Shi-Yang, A re-analysis of the light period of VZ Cancri, Chinese Astronomy and Astrophysics, December 1991, 16 (2): 148–152, Bibcode:1991AcASn..32..397C, doi:10.1016/0275-1062(92)90097-U.
- Quester, W., Photoelectric Observations of VZ Cancri 1988-1990, Information Bulletin on Variable Stars, June 1990, 3484: 1, Bibcode:1990IBVS.3484....1Q.
- Garbuzov, G. A.; Mitskevich, A. S., On the existence of an extended atmosphere in the delta Sct-type star VZ Cnc, Pis'ma v Astronomicheskii Zhurnal, April 1984, 10: 223–228, Bibcode:1984PAZh...10..223G.
- Garbusov, G. A., Spectroscopic Investigation of VZ Cnc, Information Bulletin on Variable Stars, October 1982, 2205: 1, Bibcode:1982IBVS.2205....1G.
- Cester, B.; et al, VZ Cancri, Information Bulletin on Variable Stars, September 1977, 1338: 1, Bibcode:1977IBVS.1338....1C.
- Todoran, I., Photoelectric Maxima of VZ Cancri, Information Bulletin on Variable Stars, June 1976, 1141: 1, Bibcode:1976IBVS.1141....1T.
- Hahn, G.; et al, Photoelectric Observations of VZ Cnc (HD 73857), Information Bulletin on Variable Stars, December 1975, 1078: 1, Bibcode:1975IBVS.1078....1H.
- Danziger, I. J.; Oke, J. B., Spectrophotometry of VZ Cancri, Astrophysical Journal, January 1967, 147: 151, Bibcode:1967ApJ...147..151D, doi:10.1086/148987.
- Catalano, C. P.; Neff, J. S., Variations in the Photometric Properties of RR Lyrae and VZ Cancri with Beat Phase, Astronomical Journal, 1967, 72: 788, Bibcode:1967AJ.....72S.788C, doi:10.1086/110531.
- Wildey, Robert L., Light Curve of the Cluster Variable VZ Cancri, Publications of the Astronomical Society of the Pacific, April 1966, 78 (462): 132, Bibcode:1966PASP...78..132W, S2CID 121975700, doi:10.1086/128309.
- Ponsen, J.; Oosterhoff, P. T., Photoelectric observations of VZ Cnc and RZ Cep, Bulletin of the Astronomical Institutes of the Netherlands, 1965, 18: 459, Bibcode:1965BAN....18..459P.
- McNamara, D. H.; Rogers, M. C., Spectroscopic Observations of VZ Cancri, Publications of the Astronomical Society of the Pacific, October 1962, 74 (440): 420, Bibcode:1962PASP...74..420M, S2CID 120629115, doi:10.1086/127847.
- Spinrad, Hyron, A Study or VZ Cancri, Astrophysical Journal, January 1960, 131: 134, Bibcode:1960ApJ...131..134S, doi:10.1086/146816.
- Woszczyk, A., The Colour Index of the Variable VZ Cancri, Acta Astronomica, 1958, 8: 7, Bibcode:1958AcA.....8....7W.