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arXiv 2402.05658astro-ph.SR
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一个新银河行星状星云的发现与表征

Discovery and characterisation of a new Galactic Planetary Nebula

W. E. Celnik, I. Karachentsev, P. Köchling, S. Kotov, J. Kozok, L. Magrini, A. Moiseev, M. Nischang, C. Reese, P. Remmel, P. Riepe, T. Zilch

备注：
Sumbmitted to A&A, 8 pages, 12 figures. Comments are welcome
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AI总结：

本文报告在识别NGC 2403伴星系巡天中偶然发现新暗弱行星状星云TBG-1，通过多口径望远镜观测确认其性质，并测量了物理特性，展示了专业与业余天文学家合作的价值。

摘要：

行星状星云是低质量和中等质量恒星演化过程中的最终阶段之一。它们以多种形态出现。较老且较暗的行星状星云通常因其较低的表面亮度而更难被识别。本文报告了在一次识别矮星系（即旋涡星系NGC 2403的伴星系）的巡天活动中，偶然发现了一个新的暗弱银河行星状星云（PN）。我们的目标是确认在鹿豹座中识别出的一个弥散天体的行星状星云性质。我们利用直径从20厘米到6米不等的业余和专业望远镜，获取了该星云及其中心星的窄带滤光片图像和光谱。我们探测到一个致密的三角形星云，被一个椭圆区域所包围，命名为Cam星云。它们是一个更大且更暗的圆形星云结构（命名为TBG-1）的一部分，在该结构的中心，我们识别出了可能的中心星——一颗温度约为22000 K的白矮星。对光谱的分析使我们能够测量该星云的物理特性，特别是其电子密度和温度。对图像、星云光谱以及中心星光谱的分析证实了TBG-1的行星状星云性质，其距离约为1千秒差距。这项工作重申了天文学家与业余天文学家在探测和研究新天体方面进行富有成效合作的可能性。

英文摘要：

Planetary nebulae are one of the final stages in the evolution of low and intermediate mass stars. They occur in a variety of shapes. Older and fainter ones are generally more difficult to identify because of the lower surface brightness. This paper reports the serendipitous discovery of a new faint Galactic planetary nebula (PN), during a campaign to identify dwarf galaxies, companions of the spiral galaxy NGC 2403. We aim at confirming the nature as PN of a diffuse object identified in the Camelopardalis constellation. We obtained narrow-band filter images and spectra of the nebula and its central star with amateur and professional telescopes having diameters from 20 cm to 6 m. We detected a dense triangular nebula, surrounded by an elliptical region, named Cam nebula. They are part of a larger and fainter circular nebular structure, named TBG-1, at the centre of which we have identified the possible central star, a white dwarf with a temperature of about 22 000 K. The analysis of the spectrum made it possible to measure the physical characteristics of the nebula, in particular its electronic density and temperature. Analysis of the images, of the spectra of the nebula and of the central star confirm the PN nature of TBG-1, located at the distance of about 1 kpc. This work reaffirms the potential for fruitful collaborations between astronomers and amateur astronomers in the detection and study of new objects.

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。

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