This is an analysis result of the radio spectrum of CS molecular gases (rotational transition J=3-2, 146.969026 GHz) in a celestial object called Orion KL, which was obtained using the first ACA 12-m antenna. The spectrum around 146.945GHz was generated from the apparent vibration of the frequency due to the Doppler Effect between the target object and the observer. The spectrum appears to be slightly splayed out at the both ends: the spectrum of this shape is called “outflow,” which is frequently observed in star-forming regions. Since the spectrum was obtained with the intensity equivalent to those observed with other telescopes, it was confirmed that the ACA antenna fully demonstrated its radio-wave collecting capability.
NEW ARTICLES
2024 4.11
Twinkle Twinkle Baby Star, 'Sneezes' Tell us How You Are
Astronomers have discovered the remnants of powerful ‘sneezes’ expelling gas, dust, and electromagnetic energy around s…
2024 3.28
A Glimpse by Molecules - a Production Line Inside a Busy Star Factory in a Starburst Galaxy
An international research team led by Sergio Martín of the European Southern Observatory/Joint ALMA Observatory, Nanase…
2024 2.15
In Commemoration of ALMA's 10th Anniversary, Young Astronomers Visit the ALMA Site
- Tags
- News ALMA Topics
ALMA is celebrating 10 years of full-scale operation in 2023. In December 2023, an international conference was held in…