File:Protostar HH-34.jpg
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[編輯]描述Protostar HH-34.jpg |
English: Three-colour composite of the young object Herbig-Haro 34 (HH-34), now in the protostar stage of evolution. It is based on CCD frames obtained with the FORS2 instrument in imaging mode, on November 2 and 6, 1999.
The composite of three images was taken through three different filters: B (wavelength 429 nm; Full-Width-Half-Maximum (FWHM) 88 nm; exposure time 10 min; here rendered as blue), H-alpha (centered on the hydrogen emission line at wavelength 656 nm; FWHM 6 nm; 30 min; green) and S II (centrered at the emission lines of inonized sulphur at wavelength 673 nm; FWHM 6 nm; 30 min; red) during a period of 0.8 arcsec seeing. The field shown measures 6.8 x 6.8 arcmin and the images were recorded in frames of 2048 x 2048 pixels, each measuring 0.2 arcsec. North is up; East is left. This object has a remarkable, very complicated appearance that includes two opposite jets that ram into the surrounding interstellar matter. This structure is produced by a machine-gun-like blast of "bullets" of dense gas ejected from the star at high velocities (approaching 250 km/sec). This seems to indicate that the star experiences episodic "outbursts" when large chunks of material fall onto it from a surrounding disc. HH-34 is located at a distance of approx. 1,500 light-years, near the famous Orion Nebula, one of the most productive star birth regions. Note also the enigmatic "waterfall" to the upper left, a feature that is still unexplained. Composite of three images taken through three different filters: B (wavelength 429 nm; Full-Width-Half-Maximum (FWHM) 88 nm; exposure time 10 min; here rendered as blue), H-alpha (centered on the hydrogen emission line at wavelength 656 nm; FWHM 6 nm; 30 min; green) and S II (centrered at the emission lines of inonized sulphur at wavelength 673 nm; FWHM 6 nm; 30 min; red) during a period of 0.8 arcsec seeing. The field shown measures 6.8 x 6.8 arcmin and the images were recorded in frames of 2048 x 2048 pixels, each measuring 0.2 arcsec. North is up; East is left. |
日期 | |
來源 | https://www.eso.org/public/images/eso9948b/ Archive link |
作者 | ESO |
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目前 | 2021年12月25日 (六) 20:50 | 4,961 × 4,961(4.28 MB) | Huntster(對話 | 貢獻) | Full resolution from ESO. | |
2008年9月15日 (一) 15:41 | 1,600 × 1,600(261 KB) | Lars Lindberg Christensen(對話 | 貢獻) | {{Information |Description={{en|1=Three-colour composite of the young object Herbig-Haro 34 (HH-34), now in the protostar stage of evolution. It is based on CCD frames obtained with the FORS2 instrument in imaging mode, on November 2 and 6, 1999. The com |
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製作/提供者 | ESO |
來源 | European Southern Observatory |
簡稱 |
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使用條款 |
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資料產生的日期時間 | 1999年11月17日 (三) 00:00 |
聯絡資訊 |
Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany |
關鍵字 | HH 34 |
IIM 版本 | 4 |