Press release
326KB
dicembre 21, 2016 - e.s.o.
First Light for Band 5 at ALMA — Organisation Release eso1645
Comunicato Stampa disponibile solo in lingua originale.
The Atacama Large Millimeter/submillimeter Array (ALMA) in Chile has begun observing in a new range of the electromagnetic spectrum. This has been made possible thanks to new receivers installed at the telescope’s antennas, which can detect radio waves with wavelengths from 1.4 to 1.8 millimetres — a range previously untapped by ALMA. This upgrade allows astronomers to detect faint signals of water in the nearby Universe.
ALMA observes radio waves from the Universe, at the low-energy end of the electromagnetic spectrum. With the newly installed Band 5 receivers, ALMA has now opened its eyes to a whole new section of this radio spectrum, creating exciting new observational possibilities.
The European ALMA Programme Scientist, Leonardo Testi, explains the significance: “The new receivers will make it much easier to detect water, a prerequisite for life as we know it, in our Solar System and in more distant regions of our galaxy and beyond. They will also allow ALMA to search for ionised carbon in the primordial Universe.”
It is ALMA’s unique location, 5000 metres up on the barren Chajnantor plateau in Chile, that makes such an observation possible in the first place. As water is also present in Earth’s atmosphere, observatories in less elevated and less arid environments have much more difficulty identifying the origin of the emission coming from space. ALMA’s great sensitivity and high angular resolution mean that even faint signals of water in the local Universe can now be imaged at this wavelength [1].
The Band 5 receiver, which was developed by the Group for Advanced Receiver Development (GARD) at Onsala Space Observatory, Chalmers University of Technology, Sweden, has already been tested at the APEX telescope in the SEPIA instrument. These observations were also vital to help select suitable targets for the first receiver tests with ALMA.
The first production receivers were built and delivered to ALMA in the first half of 2015 by a consortium consisting of theNetherlands Research School for Astronomy (NOVA) and GARD in partnership with the National Radio Astronomy Observatory (NRAO), which contributed the local oscillator to the project. The receivers are now installed and being prepared for use by the community of astronomers.
To test the newly installed receivers observations were made of several objects including the colliding galaxies Arp 220, a massive region of star formation close to the centre of the Milky Way, and also a dusty red supergiant star approaching the supernova explosion that will end its life [2].
To process the data and check its quality, astronomers, along with technical specialists from #eso and the European ALMA Regional Centre (ARC) network, gathered at the Onsala Space Observatory in Sweden, for a "Band 5 Busy Week" hosted by the Nordic ARC node [3]. The final results have just been made freely available to the astronomical community worldwide.
Team member Robert Laing at #eso is optimistic about the prospects for ALMA Band 5 observations: “It's very exciting to see these first results from ALMA Band 5 using a limited set of antennas. In the future, the high sensitivity and angular resolution of the full ALMA array will allow us to make detailed studies of water in a wide range of objects including forming and evolved stars, the interstellar medium and regions close to supermassive black holes.”
ann1098a
1983x2944, 865KB
ann12042a
4770x3456, 4MB
ann15059a
3598x2491, 1MB
eso1645a
955x692, 163KB
News correlate |
||
|
|
|
luglio 11, 2023
|
giugno 27, 2023
|
maggio 03, 2023
|
|
Comunicato Stampa disponibile solo in lingua originale. The European Southern Observatory’s Extremely Large Telescope (ESO’s ELT) ... |
Comunicato Stampa disponibile solo in lingua originale. This cloud of orange and red, part of the Sh2-284 nebula, is shown here in... |
Comunicato Stampa disponibile solo in lingua originale. Using ESO’s Very Large Telescope (VLT), researchers have found for the fir... |
Scarica tutto 
Ti potrebbe interessare anche |
||
|
|
|
aprile 27, 2023
|
novembre 10, 2022
|
aprile 20, 2022
|
|
Comunicato Stampa disponibile solo in lingua originale. For the first time, astronomers have observed, in the same image, the shad... |
Comunicato Stampa disponibile solo in lingua originale. For the past 60 years the European Southern Observatory (ESO) has been ena... |
Comunicato Stampa disponibile solo in lingua originale. Celebrating Hubble’s 32nd Birthday with a Galaxy Grouping19 April 2022The ... |
Inglese 
Scarica tutto 
Condividi
Condividi via mail 
Automotive
Sport
Events
Art&Culture
Design
Fashion&Beauty
Food&Hospitality
Tecnologia
Nautica
Racing
Excellence
Corporate
OffBeat
Green
Gift
Pop
Heritage
Entertainment
Health & Wellness