Pre-perihelion observations of long-period comet C/2013 X1 (PANSTARRS)

被引:2
作者
Shubina, Olena [1 ,2 ]
Ivanova, O. [1 ,2 ,3 ]
Petrov, D. [4 ]
Luk'yanyk, I [3 ]
Rosenbush, V [3 ]
Kiselev, N. [4 ]
机构
[1] Slovak Acad Sci, Astron Inst, Tatranska Lomnica 05960, Slovakia
[2] Natl Acad Sci Ukraine, Main Astron Observ, 27 Akad Zabolotnoho St, UA-03680 Kiev, Ukraine
[3] Taras Shevchenko Natl Univ Kyiv, Astron Observ, 3 Observatorna St, UA-04053 Kiev, Ukraine
[4] Crimean Astrophys Observ, UA-298409 Nauchnij, Crimea, Ukraine
关键词
methods: numerical - methods: observational; techniques: photometric; techniques: polarimetric; techniques: spectroscopic; NARROW-BAND PHOTOMETRY; DISTANT COMETS; CCD PHOTOMETRY; ENSEMBLE PROPERTIES; LIGHT-SCATTERING; STANDARD STARS; SPECTROSCOPY; DUST; POLARIMETRY; PARTICLES;
D O I
10.1093/mnras/stae441
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present and analyse the results of quasi-simultaneous spectroscopic, photometric, and polarimetric observations of hyperbolic comet C/2013 X1 (PANSTARRS) obtained at the 6-m Big Telescope Alt-azimuth (BTA) telescope Special Astrophysical Observatory (SAO) and 2.6-m Shajn telescope Crimean Astrophysical Observatory (CrAO). A wide fan-shaped structure and a weak tail were detected in the comet. The mean V - R colour of the coma was estimated to be neutral compared to the solar value. The Af rho parameter, a proxy to the dust production in the comet, was about 1672 +/- 21 cm in the R band. Emissions of the CN, C-2, C-3, and NH2 molecules were identified in the cometary spectrum, which covers the wavelength range 3800 - 7100 & Aring;. When the comet was at a distance of 2.66 au from the Sun, the minimum degree of polarization of about -1.5 per cent was detected in the near-nucleus region of the coma, in the range up to about 10 000 km from the optocentre. Further, polarization gradually increased (in absolute value) with distance from the nucleus, reaching -6.5 per cent at about 50 000 km. To reproduce the observed values of linear polarization and the phase-angle dependence of polarization for long-period comets, we used the Sh-matrix method with conjugated Gaussian random particles as light scatters, and the chemical composition of dust particles in the coma of 74 per cent amorphous carbon, 25 per cent of Mg-rich silicates, and 1 per cent of water ice.
引用
收藏
页码:7027 / 7036
页数:10
相关论文
共 84 条
  • [1] Technique of polarimetric observations of faint objects at the 6-m BTA telescope
    Afanasiev, V. L.
    Amirkhanyan, V. R.
    [J]. ASTROPHYSICAL BULLETIN, 2012, 67 (04) : 438 - 452
  • [2] Afanasiev VL, 2011, BALT ASTRON, V20, P363
  • [3] The ensemble properties of comets: Results from narrowband photometry of 85 comets, 1976-1992
    AHearn, MF
    Millis, RL
    Schleicher, DG
    Osip, DJ
    Birch, PV
    [J]. ICARUS, 1995, 118 (02) : 223 - 270
  • [4] COMET BOWELL 1980B
    AHEARN, MF
    SCHLEICHER, DG
    FELDMAN, PD
    MILLIS, RL
    THOMPSON, DT
    [J]. ASTRONOMICAL JOURNAL, 1984, 89 (04) : 579 - 591
  • [5] Carbon-rich dust in comet 67P/Churyumov-Gerasimenko measured by COSIMA/Rosetta
    Bardyn, Anais
    Baklouti, Donia
    Cottin, Herve
    Fray, Nicolas
    Briois, Christelle
    Paquette, John
    Stenzel, Oliver
    Engrand, Cecile
    Fischer, Henning
    Hornung, Klaus
    Isnard, Robin
    Langevin, Yves
    Lehto, Harry
    Le Roy, Lena
    Ligier, Nicolas
    Merouane, Sihane
    Modica, Paola
    Orthous-Daunay, Francois-Regis
    Ryno, Jouni
    Schulz, Rita
    Silen, Johan
    Thirkell, Laurent
    Varmuza, Kurt
    Zaprudin, Boris
    Kissel, Jochen
    Hilchenbach, Martin
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2017, 469 : S712 - S722
  • [6] Bolin B., 2013, Central Bureau Electronic Telegrams, V3736, P1
  • [7] Thirty years of cometary spectroscopy from McDonald Observatory
    Cochran, A. L.
    Barker, E. S.
    Gray, C. L.
    [J]. ICARUS, 2012, 218 (01) : 144 - 168
  • [8] Water production activity of nine long-period comets from SOHO/SWAN observations of hydrogen Lyman-alpha: 2013-2016
    Combi, M. R.
    Makinen, T. T.
    Bertaux, J. -L.
    Quemerais, E.
    Ferron, S.
    Avery, M.
    Wright, C.
    [J]. ICARUS, 2018, 300 : 33 - 46
  • [9] The distant activity of short-period comets - I
    Epifani, E. Mazzotta
    Palumbo, P.
    Capria, M. T.
    Cremonese, G.
    Fulle, M.
    Colangeli, L.
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2007, 381 (02) : 713 - 722
  • [10] Photometry of the Oort Cloud comet C/2009 P1 (Garradd): Pre-perihelion observations at 5.7 and 2.5 AU
    Epifani, E. Mazzotta
    Snodgrass, C.
    Perna, D.
    Dall'Ora, M.
    Palumbo, P.
    Della Corte, V.
    Alvarez-Candal, A.
    Melita, M.
    Rotundi, A.
    [J]. PLANETARY AND SPACE SCIENCE, 2016, 132 : 23 - 31