|
ИСТИНА |
Войти в систему Регистрация |
ИПМех РАН |
||
The Potential for a Ka-band (32 GHz) worldwide VLBI networkстатья
- Авторы: Jacobs C.S., Bach U., Colomer F., Garcá-Miró C., Gómez-González J., Gulyaev S., Horiuchi S., Ichikawa R., Kraus A., Kronschnabl G., López-Fernández J.A., Lovell J., Majid W., Natusch T., Neidhardt A., Phillips C., Porcas R., Romero-Wolf A., Saldana L., Schreiber U., Sotuela I., Takeuchi H., Trinh J., Tzioumis A., de Vincente P., Zharov V.E.
- Сборник: Seventh General Meeting (GM2012) of the international VLBI Service for Geodesy and Astrometry (IVS)
- Год издания: 2012
- Издательство: Us National Aeronautics And Space Administration
- Местоположение издательства: Washington Dc, United States
- Первая страница: 194
- Последняя страница: 198
- Аннотация: Ka-band (32 GHz, 9 mm) Very Long Baseline Interferometric (VLBI) networking has now begun and has tremendous potential for expansion over the next few years. Ka-band VLBI astrometry from NASA's Deep Space Network has already developed a catalog of 470 observable sources with highly accurate positions. Now, several antennas worldwide are planning or are considering adding Ka-band VLBI capability. Thus, there is now an opportunity to create a worldwide Ka-band network with potential for high resolution imaging and astrometry. With baselines approaching a Giga-lambda, a Ka-band network would be able to probe source structure at the nano-radian (200 as) level (100X better than Hubble) and thus gain insight into the astrophysics of the most compact regions of emission in active galactic nuclei. We discuss the advantages of Ka-band, show the known sources and candidates, simulate projected baseline (uv) coverage, and discuss potential radio frequency feeds. The combination of these elements demonstrates the feasibility of a worldwide Ka network within the next few years.
- Добавил в систему: Жаров Владимир Евгеньевич