The Formation and Evolution of Planetary Systems (FEPS): Discovery of an Unusual Debris System Associated with HD 12039
The Formation and Evolution of Planetary Systems (FEPS): Discovery of an Unusual Debris System Associated with HD 12039
复制标题
行星系统的形成和演化（FEPS）：发现与 HD 12039 相关的不寻常碎片系统
DOI：
10.1086/498929
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
K. Su
中科院分区：
文献类型：
--
作者：
D. Hines;D. Backman;J. Bouwman;L. Hillenbrand;J. Carpenter;M. Meyer;J. Kim;M. Silverstone;J. Rodmann;S. Wolf;E. Mamajek;T. Brooke;D. Padgett;T. Henning;A. Moro;E. Stobie;K. Gordon;J. Morrison;J. Muzerolle;K. Su
我们报告使用斯皮策太空望远镜在3.6-160 μm范围内的观测发现了一个与~30 Myr年龄的G3/5V恒星HD 12039相关的碎片系统。在λ≥14 μm的预期光球之上观测到的红外余量（LIR/L* = 1 × 10-4）由色温为T ~ 110 K的热发射物质拟合，该色温比迄今为止发现的大多数类太阳恒星周围的碎片盘都要高。在70 μm处未检测到目标，上限为3 σ，是期望光球通量的6倍。红外光谱的过剩可以用温暖的、光学薄的物质来解释，这些物质由黑体状的颗粒组成，大小约为7 μm，位于4-6天文单位的恒星轨道上。另一种由较小颗粒主导的模型也有可能，接近喷出尺寸a ~ 0.5 μm，位于30-40天文单位，但要求尘埃是最近产生的，因为这种小颗粒将在大约102年的几次辐射压力下从系统中排出。
We report the discovery of a debris system associated with the ~30 Myr old G3/5V star HD 12039 using Spitzer Space Telescope observations from 3.6-160 μm. An observed infrared excess (LIR/L* = 1 × 10-4) above the expected photosphere for λ ≳ 14 μm is fit by thermally emitting material with a color temperature of T ~ 110 K, warmer than the majority of debris disks identified to date around Sun-like stars. The object is not detected at 70 μm with a 3 σ upper limit 6 times the expected photospheric flux. The spectrum of the infrared excess can be explained by warm, optically thin material comprised of blackbody-like grains of size ≳7 μm that reside in a belt orbiting the star at 4-6 AU. An alternate model dominated by smaller grains, near the blowout size a ~ 0.5 μm, located at 30-40 AU is also possible but requires the dust to have been produced recently, since such small grains will be expelled from the system by radiation pressure in approximately a few times 102 yr.
影响因子：
3.2
作者：
V. Mannings;A. Boss;S. Russell
通讯作者：
V. Mannings;A. Boss;S. Russell