Greenbrier designs, builds, leases, and maintains freight railcars worldwide — including tank cars, hoppers, boxcars, and autoracks. A global leader in rail innovation.
The Isaac Newton Telescope Photometric H-alpha Survey (Iphas) is currently mapping the Northern Galactic plane reaching to r'=20 mag with typically 1" resolution. Hundreds of Planetary Nebulae (PNe), both point-like and resolved, are
What are the unique morphological features of IPHAS PN-1?IPHAS PN-1 exhibits a compact elliptical ring, inner lobes, and faint outer bipolar lobes extending over 100′′. This complex geometry categorizes it among the rare quadrupolar nebulae.How does IPHAS improve upon previous planetary nebula surveys?The IPHAS offers improved spatial resolution and a comprehensive photometric Hα mapping of 1800 square degrees. It is estimated to discover several hundred new planetary nebulae with lower surface brightness.What are the estimated physical properties of the nebula's central star?The central star exhibits broad Hα emission with a flux of I Hα = 2.5×10^-15 erg cm^-2 s^-1. Its environment suggests high density conditions exceeding N_e > 10^10 cm^-3, indicative of a complex evolution.
Tseng Shu-o (Chinese: 曾淑娥; pinyin: Céng Shú'é; born 6 September 1984) is a Taiwanese footballer who plays as a midfielder for Spanish Primera Nacional club CF Joventut Almassora.
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