The wisconsin Ha mapper: a new look at the warm ionized medium
Fuente:
Redalyc
Saved in:
| Main Author: | |
|---|---|
| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad Nacional Autónoma de México
2000
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1876441475494969344 |
|---|---|
| author | L. M. Haffner |
| author_facet | L. M. Haffner |
| contents | The wisconsin Ha mapper: a new look at the warm ionized medium L. M. Haffner R. J. Reynolds S. L. Tufte Física, Astronomía y Matemáticas ISM: ATOMS GALAXY: HALO H II REGIONS ISM: STRUCTURE The Wisconsin H-Alpha Mapper (WHAM) has surveyed the entire northernsky in H from Kitt Peak, Arizona. Using a high-throughput, 15-cm diameterdouble-etalon Fabry-Perot spectrometer and a sensitive CCD detector, the WHAMsurvey provides the rst calibrated, velocity-resolved map of H emission in ourGalaxy. A large portion of the Galaxy, which samples regions of the Local (Orion)spiral arm and the more distant Perseus arm, has been also been observed withthe WHAM in lines of [S II] and [N II]. These new data directly probe the physicalconditions of the Warm Ionized Medium (WIM) on a global scale for the rsttime. Trends in these line ratios over this large region of the sky suggest thattemperature variations are traced by the [N II]/H and [S II]/H maps. Since theseratios increase dramatically away from the Galactic plane, they reveal a substantialtemperature rise in WIM halo gas. In addition to this striking new result, thedata set also reveals new information about the ionization in the WIM throughthe [S II]/[N II] ratio, uncovers a previously undiscovered B-star H II region, andprovides an accurate measurement of the electron scale height of the WIM. 2000 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57100962 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Vol.9 |
| format | Artículo científico |
| id | redalyc_57100962 |
| institution | Redalyc |
| language | en |
| publishDate | 2000 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | The wisconsin Ha mapper: a new look at the warm ionized medium L. M. Haffner Física, Astronomía y Matemáticas ISM: ATOMS GALAXY: HALO H II REGIONS ISM: STRUCTURE The wisconsin Ha mapper: a new look at the warm ionized medium L. M. Haffner R. J. Reynolds S. L. Tufte Física, Astronomía y Matemáticas ISM: ATOMS GALAXY: HALO H II REGIONS ISM: STRUCTURE The Wisconsin H-Alpha Mapper (WHAM) has surveyed the entire northernsky in H from Kitt Peak, Arizona. Using a high-throughput, 15-cm diameterdouble-etalon Fabry-Perot spectrometer and a sensitive CCD detector, the WHAMsurvey provides the rst calibrated, velocity-resolved map of H emission in ourGalaxy. A large portion of the Galaxy, which samples regions of the Local (Orion)spiral arm and the more distant Perseus arm, has been also been observed withthe WHAM in lines of [S II] and [N II]. These new data directly probe the physicalconditions of the Warm Ionized Medium (WIM) on a global scale for the rsttime. Trends in these line ratios over this large region of the sky suggest thattemperature variations are traced by the [N II]/H and [S II]/H maps. Since theseratios increase dramatically away from the Galactic plane, they reveal a substantialtemperature rise in WIM halo gas. In addition to this striking new result, thedata set also reveals new information about the ionization in the WIM throughthe [S II]/[N II] ratio, uncovers a previously undiscovered B-star H II region, andprovides an accurate measurement of the electron scale height of the WIM. 2000 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57100962 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Vol.9 |
| title | The wisconsin Ha mapper: a new look at the warm ionized medium |
| topic | Física, Astronomía y Matemáticas ISM: ATOMS GALAXY: HALO H II REGIONS ISM: STRUCTURE |
| url | https://www.redalyc.org/articulo.oa?id=57100962 |