VSOP observations of a GHZ-peaked spectrum source OQ 208
We present λ18 cm VSOP observations towards a GHz-peaked spectrum (GPS) source OQ 208. A double lobe seen by high-frequency ground VLBI observations is confirmed, although its brightness is more asymmetric at lower frequency. Comparing with images at higher frequency, we found asymmetric free-free a...
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| Published in: | Advances in space research Vol. 26; no. 4; pp. 705 - 708 |
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| Main Authors: | , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Elsevier Ltd
01-01-2000
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| Online Access: | Get full text |
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| Summary: | We present λ18 cm VSOP observations towards a GHz-peaked spectrum (GPS) source OQ 208. A double lobe seen by high-frequency ground VLBI observations is confirmed, although its brightness is more asymmetric at lower frequency. Comparing with images at higher frequency, we found asymmetric free-free absorption towards the double lobe. We can explain the spectral asymmetry by a slant jet axis against line of sight, which causes different optical depth in the ambient plasma. |
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| Bibliography: | SourceType-Scholarly Journals-2 ObjectType-Feature-2 ObjectType-Conference Paper-1 content type line 23 SourceType-Conference Papers & Proceedings-1 ObjectType-Article-3 |
| ISSN: | 0273-1177 1879-1948 |
| DOI: | 10.1016/S0273-1177(99)01196-5 |