arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1511.03470astro-ph.SR
收藏

H II区中心早型光谱双星HD 161853的光谱和光度分析

Spectroscopic and photometric analysis of the early-type spectroscopic binary HD 161853 in the centre of an H II region

R. Gamen, C. Putkuri, N. I. Morrell, R. H. Barbá, J. I. Arias, J. Maíz Apellániz, N. R. Walborn, A. Sota, E. J. Alfaro

摘要:

我们研究了O型星HD 161853,它被认为是一个可能的双线分光双星系统。在过去的九年里,我们获得了HD 161853的高分辨率光谱。我们首次分离了系统中的两个分量,并测量了它们各自的径向速度。我们确认HD 161853是一个$\sim$双星系统,年龄为1 Ma,由一颗O 8 V星($M_{\rm A,RV} \geq 22$ M $_\odot$)和一颗B1- 3 V星($M_{\rm B,RV} \geq 7.2$ M $_\odot$)组成。根据径向速度曲线,我们测量到轨道周期$P$ = 2.66765 $\pm$ 0.00001 d和偏心率$e$ = 0.121 $\pm$ 0.007。它的$V$波段光变曲线在0. 014等内是恒定的,并且不显示日食,我们从这一点施加了最大轨道倾角$i=54$ deg。HD 161853可能与一个H II区和一个未被充分研究的非常年轻的疏散星团有关。此外,我们检测到一个紧凑的发射区在50角秒HD 161853在22 $μ$ m-WISE和24 $μ$ m-Spitzer图像,这可能是一个尘埃波堆积的大质量双星系统的辐射压力。

英文摘要:

We study the O-type star HD 161853, which has been noted as a probable double-lined spectroscopic binary system. We secured high-resolution spectra of HD 161853 during the past nine years. We separated the two components in the system and measured their respective radial velocities for the first time. We confirm that HD 161853 is an $\sim$1 Ma old binary system consisting of an O8 V star ($M_{\rm A,RV} \geq 22$ M$_\odot$) and a B1--3 V star ($M_{\rm B,RV} \geq 7.2$ M$_\odot$) at about 1.3 kpc. From the radial velocity curve, we measure an orbital period $P$ = 2.66765$\pm$0.00001 d and an eccentricity $e$ = 0.121$\pm$0.007. Its $V$-band light curve is constant within 0.014 mag and does not display eclipses, from which we impose a maximum orbital inclination $i=54$ deg. HD 161853 is probably associated with an H II region and a poorly investigated very young open cluster. In addition, we detect a compact emission region at 50 arcsec to HD 161853 in 22$μ$m-WISE and 24$μ$m-Spitzer images, which may be identified as a dust wave piled up by the radiation pressure of the massive binary system.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑