Abstrakti
We used 15 GHz VLBA observations of 363 sources having at least 5 epochs within a time interval 1995-2013 from the MOJAVE program and/or its predecessor, the 2 cm VLBA Survey. For each source we produced a corresponding stacked image averaging all available epochs for a better reconstruction of the cross section of the flow. We have analyzed jet profiles transverse to the local jet ridge line and derived both apparent and intrinsic opening angles of the parsecscale outflows. The sources detected by the Fermi Large Area Telescope (LAT) during the first 24 months of operation show wider apparent jet opening angle and smaller viewing angles on a very high level of significance supporting our early findings. Analyzing transverse shapes of the outflows we found that most sources have conical jet geometry at parsec scales, though there are also sources that exhibit active jet collimation.
Alkuperäiskieli | Englanti |
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Otsikko | 12th European VLBI Network Symposium, Cagliari, Italy, Oct 2014 |
Kustantaja | Scuola Internazionale Superiore di Studi Avanzati (SISSA) |
Sivumäärä | 4 |
Tila | Julkaistu - 2015 |
OKM-julkaisutyyppi | A4 Artikkeli konferenssijulkaisussa |
Tapahtuma | European VLBI Network Symposium and Users Meeting - Cagliari, Italia Kesto: 7 lokak. 2014 → 10 lokak. 2014 Konferenssinumero: 12 |
Julkaisusarja
Nimi | Proceedings of Science |
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Kustantaja | Scuola Internazionale Superiore di Studi Avanzati (S I S S A) |
ISSN (painettu) | 1824-8039 |
Conference
Conference | European VLBI Network Symposium and Users Meeting |
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Lyhennettä | EVN Symposium |
Maa/Alue | Italia |
Kaupunki | Cagliari |
Ajanjakso | 07/10/2014 → 10/10/2014 |
Sormenjälki
Sukella tutkimusaiheisiin 'Opening angles and shapes of parsec-scale AGN jets'. Ne muodostavat yhdessä ainutlaatuisen sormenjäljen.Laitteet
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Metsähovin radiotutkimusasema
Tammi, J. (Manager)
Sähkötekniikan korkeakouluLaitteistot/tilat: Facility