A team of astronomers utilized the Atacama Large Millimeter/submillimeter Array (ALMA) and examined a nearby stardust galaxy dubbed NGC 1482. Their results include a molecular gas outflow that could significantly improve the understanding of the galactic wind NGC 1482.
At a distance of approximately 63.9 million light-years, NGC 1482 is known as an early-type galaxy in the Eridanus group of galaxies. It possesses a central bulge enclosed by a gaseous disk, and a warm ionized gas spreading perpendicular to the disk. The recent observation offers essential data about the dynamics and distribution of NGC 1482’s molecular gas. Here is what you need to know.
ALMA Observations Offers Significant Data
ALMA observations discovered recently that molecular gas in NGC 1482 is divided into an almost edge-on disk with an angle of 76 degrees and a radius of approximately 9,800 light-years. The outflow seems to be prolonged at a minimum of 4,900 light-years perpendicular to the disk. Astronomers explain that this is the first observation of a molecular wind in NGC 1482.
The center of the molecular outflow is the 100GHz continuum emission with a range of around 3,260 light-years. The researchers succeeded in deriving a star-formation rate (SFR) for the central star blast area of NGC 1482 from the continuum flux density. And according to the recent study, the SFR for this area reaches a level of around 4.8 solar masses/year.
Moreover, the total molecular gas mass of NGC 1482 was measured to be some 2.7 billion solar masses, and the outflow has a mass of approximately 70 million solar masses. The molecular wind speed is around 100km/s. In contrast, the wind’s kinetic energy and momentum were about 1 % and 20 % of the initial point and rate discharged by supernova blasts in the central region of NGC 1482.
The results that NGC 1482 has encountered a tidal interaction with its nearby galaxy, NGC 1481. The study concludes that the star blast and superwind in NGC 1482 were influenced by tidal interaction. Such a thing was conducted to a short supply of neutral gas into the galactic center region.
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