Distances Scale Determination for a Planetary Nebula in Galactic Bulge

• 作者: Mohamed A. Sallih Nathera A. Ali Sundus A. Abdullah
• 来源期刊: 天文学与天体物理学国际期刊(英文)
• 学科: 地球科学
• 关键词: PLANETARY NEBULAE MASSES DISTANCES PLANETARY NEBULAE
• 年，卷（期）: 2013,（2）
• 页码范围: 81-86
• 页数: 6页
• 分类号: P1

摘要

Planetary Nebulae (PN) distances represent the fundamental parameter for the determination the physical properties of the central star of PN. In this paper the distances scale to Planetary Nebulae in the Galactic bulge were calculated related to previous distances scales. The proposed distance scale was done by recalibrated the previous distance scale technique CKS/D82. This scale limited for nearby PN (D ≤ 3.5 kpc), so the surface fluxes less than other distance scales. With these criteria the results showed that the proposed distance scale is more accurate than other scales related to the observations for adopted sample of PN distances, also the limit of ionized radius (Rio) for all both optically thick and optically thin in the rang of sizes (0.45 > Rio (pc) > 0.03).