Yebes 40 m radio telescope and the broad band NANOCOSMOS receivers at 7 mm and 3 mm for line surveys
| Autor: | J. M. Serna, P. García-Carreño, Oscar García, J. A. López-Fernández, F. Tercero, Juan R. Pardo, Ricardo Amils, José Cernicharo, M. Santander-García, G. Gómez-Molina, B. Vaquero, Juan Daniel Gallego, Valentin Bujarrabal, J. M. Hernandez, F. Beltrán, J. González-García, J. A. López-Pérez, M. Gómez-Garrido, I. Malo, P. de Vicente, L. Barbas, C. Albo, I. Lopez-Fernandez, M. C. Diez, M. Patino-Esteban, Belén Tercero |
|---|---|
| Přispěvatelé: | European Commission, Instituto Geográfico Nacional (España) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
European VLBI Network
Line: identification Techniques: spectroscopic FOS: Physical sciences 02 engineering and technology 01 natural sciences 7. Clean energy Radio spectrum Article law.invention spectroscopic [Techniques] Telescope Radio telescope Q band W band law 0103 physical sciences Very-long-baseline interferometry 0202 electrical engineering electronic engineering information engineering media_common.cataloged_instance European union identification [Line] 010303 astronomy & astrophysics Instrumentation and Methods for Astrophysics (astro-ph.IM) molecules [ISM] media_common Physics Astronomy 020206 networking & telecommunications Astronomy and Astrophysics Circumstellar matter ISM: molecules Space and Planetary Science Astrophysics - Instrumentation and Methods for Astrophysics Telescopes |
| Zdroj: | Digital.CSIC: Repositorio Institucional del CSIC Consejo Superior de Investigaciones Científicas (CSIC) Digital.CSIC. Repositorio Institucional del CSIC instname Astron Astrophys |
| Popis: | 22 pags., 27 figs., 6 tabs. Context. Yebes 40 m radio telescope is the main and largest observing instrument at Yebes Observatory and is devoted to very long baseline interferometry (VLBI) and single-dish observations since 2010. It has been covering frequency bands between 2 GHz and 90 GHz in discontinuous and narrow windows in most cases in order to match the current needs of the European VLBI Network (EVN) and the Global Millimeter VLBI Array (GMVA). Aims. The Nanocosmos project, a European Union-funded synergy grant, has enabled an increase in the instantaneous frequency coverage of the Yebes 40 m radio telescope, making it possible to observe many molecular transitions with single tunings in single-dish mode. This reduces the observing time and maximises the output from the telescope. Methods. We present technical specifications of the recently installed 31.5-50 GHz (Q band) and 72-90.5 GHz (W band) receivers along with the main characteristics of the telescope at these frequency ranges. We observed IRC+10216, CRL 2688, and CRL 618, which harbour a rich molecular chemistry, to demonstrate the capabilities of the new instrumentation for spectral observations in single-dish mode. Results. Our results show the high sensitivity of the telescope in the Q band. The spectrum of IRC+10126 offers an unprecedented signal-to-noise ratio for this source in this band. On the other hand, the spectrum normalised by the continuum flux towards CRL 618 in the W band demonstrates that the 40 m radio telescope produces comparable results to those from the IRAM 30 m radio telescope, although with a lower sensitivity. The new receivers fulfil one of the main goals of Nanocosmos and open up the possibility to study the spectrum of different astrophysical media with unprecedented sensitivity. The research leading to these results has received funding from the European Research Council under the European Union’s Seventh Framework Programme (FP/2007-2013)/ERC-SyG-2013 Grant Agreement No. 610256 Nanocosmos. Part of this work was supported by Programa operativo pluriregional de España, YDALGO. The observations mentioned in this article have been done under commissioning time and within projects 19A010 and 20A017. The Yebes 40m radio telescope belongs to Instituto Geográfico Nacional (IGN). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|