Detection of ca II absorption triplet in a circumnuclear H II region of ngc 3310
We have obtained long slit spectrophotometry across NGC 3310, a lurninous galaxy with cucumnuclear bursts of star formation, covering the spectral range from λ3650 to 9700 Å. In one giant star-forrning region, the near-IR Ca II absorption lines (a signature of young supergiants) was detected with a...
| Authors: | , , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 1990 |
| Country: | Brasil |
| Institution: | Universidade Federal do Rio Grande do Sul (UFRGS) |
| Repository: | Repositório Institucional da UFRGS |
| Language: | English |
| OAI Identifier: | oai:www.lume.ufrgs.br:10183/88366 |
| Online Access: | http://hdl.handle.net/10183/88366 |
| Access Level: | Open access |
| Keyword: | Astrofísica Galáxias Regiões HII Formacao de estrelas Espectrofotometria |
| Summary: | We have obtained long slit spectrophotometry across NGC 3310, a lurninous galaxy with cucumnuclear bursts of star formation, covering the spectral range from λ3650 to 9700 Å. In one giant star-forrning region, the near-IR Ca II absorption lines (a signature of young supergiants) was detected with a strength similar to that of the nuclear region. This is, to our knowledge, the first detection of the IR Ca II triplet in an extragalactic giant H li region and confirms theoretical predictions that, after some 4 Myr, red supergiants should appear in bursts of star formation. |
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