Discovering the interior of the galaxy NGC 5643


An international team, led by the researcher of the Astrobiology Center (CSIC-INTA) Almudena Alonso Herrero, has discovered in the galaxy NGC 5643 a rotating disk with spiral arms, as well as like large amounts of ionized gas that are expelled on both sides of the galaxy. NGC 5643 is a Seyfert type galaxy and is relatively close to Earth (55 million light years), in the constellation Lupus (Lobo) of the Southern Hemisphere, which allows it to be observed in great detail, although with difficulty added that its active core is completely obscured in our line of sight.

The nuclei of Seyfert galaxies glow with great intensity to the presence of material that is being accreted by a supermassive black hole located at its center. These nuclear regions are also surrounded by large amounts of gas and dust that make them, in certain lines of vision, completely obscured, making it difficult to observe.

In this new work, published in the Astrophysical Journal , the researchers, among whom is also the researcher of the CAB Álvaro Labiano, have combined the data in the millimeter range of the electromagnetic spectrum obtained with ALMA (Atacama Large Milimeter / submillimeter Array) with the optical file data of the MUSE instrument (Multi Unit Spectroscopic Explorer), installed in the VLT (Very Large Telescope ) of the European Southern Observatory (ESO). & nbsp;

Figure: image of the center of the galaxy NGC 5643 The central kilo-parsecs of the galaxy where the presence of cold molecular gas (in reddish colors) in the form of a nuclear disk and spinning spiral arms, as well as large amounts of ionized gas (in blue and orange colors) are shown which is being expelled on both sides of the galaxy. The nuclear disk detected by ALMA has a few tens of parsecs in diameter and is not only spinning, but is also expanding in its equatorial direction. © ESO / A. Alonso Herrero et al .; ALMA (ESO / NAOJ / NRAO)

This image has been chosen by the European Southern Observatory (ESO) as an image of the week on May 28, 2018.


Fuente: UCC-CAB

Fecha: 2018-06-11


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