Carbon and silicate dust formation in V1280 Sco

[摘要] This study investigates the temporal evolution of the infrared emission from the dusty nova V1280 Sco over 2000 days from the outburst. We have revealed that the infrared spectral energy distributions at 1272, 1616 and 1947 days are explained by the emissions produced by amorphous carbon dust of mass (6.6-8.7) × 10-8Mowith a representative grain size of 0.01 μm and astronomical silicate dust of mass (3.4-4.3) × 10-7Mowith a representative grain size of 0.3-0.5 μm. Both of carbon and silicate dust travel farther away from the white dwarf without an apparent mass evolution throughout those later epochs.

[发布机构] Department of Astronomy, Graduate Schools of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo; 113-0033, Japan^1;Institute of Astronomy, University of Tokyo, 2-21-1 Ohsawa, Mitaka, Tokyo; 181-0015, Japan^2;National Astronomical Observatory of Japan, Mitaka, Tokyo; 181-8588, Japan^3;Institute of Low Temperature Science, Hokkaido University, Sapporo; 060-0819, Japan^4;Subaru Telescope, National Astronomical Observatory of Japan, 650 North Aohoku Place, Hilo; HI; 96720, United States^5;Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Aramaki aza Aoba 6-3, Aoba-ku, Sendai; 980-8578, Japan^6;Koyama Astronomical Observatory, Kyoto Sangyo University, Motoyama, Kamigamo, Kita-ku, Kyoto; 603-8555, Japan^7;Hiroshima Astrophysical Science Center, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima; 739-8526, Japan^8;Department of Physics and Astronomy, Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima; 890-0065, Japan; (10) Department of Astrophysics, Nagoya University, Furo-cho, Chikusa-ku, Aichi, Nagoya; 464-8602, Japan; (11) Department of Physics and Astronomy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul; 151-742, Korea, Republic of; (12) Department of Cosmosciences, Graduate School of Science, Hokkaido University, Sapporo; 060-0810, Japan^9

[效力级别] 天文学 [学科分类] 天文学(综合)

[关键词] Dust formation;Grain size;Infrared emissions;Infrared spectral;Temporal evolution