New Delhi: Astronomers have detected a new active galaxy. It has been identified as a distant gamma ray emitting galaxy. This active galaxy is called the Nero line Seifert-1 (NLS-1) galaxy.
It is about 31 billion light squares behind. This discovery paves the way for further exploration. In 1929, Admin Habbal discovered that the universe was expanding. Since then it has been known that most galaxies are falling away from us. The light from these galaxies is diverted to a longer radio wave. This is called red shift. Scientists are exploring this turn of galaxies so that the universe can be understood.
Scientists at ARIES, an autonomous institute in the Department of Science and Technology, studied about 25,000 brightly active glacticonuclei (AGNs) from the Sloan Digital Sky Survey (SDSS) in collaboration with researchers from other institutions and found that a bizarre mass at high redshifts (from a More) is emitting high energy gamma ray. SDSS is a major optical and spectroscopic survey used in the past 20 years to visualize celestial bodies. Scientists have identified it as gamma ray emitter NLS-1 Glaxy. It is rare in space. Sources of particles in the universe travel at the speed of light. These sources are driven by AGNs driven by large blackhole energies and are hosted in a massive elliptical galaxy. But gamma ray emission from NLS-1 challenges how relativistic particles form because NLS-1 is a unique class of AGN that receives energy from a low-mass blackhole and is hosted in a rotating galaxy. So far gamma ray emission has been detected in approximately one recorded NLS-1 galaxy. These are separate sections of AGN identified 4 decades ago. All have turned to long radio waves. All are smaller than each other and have yet to find a way to detect NLS-1 larger than each other at red shift. This discovery will pave the way for the detection of gamma ray emitting NLS-1 galaxies in the universe.
Scientists used the world’s largest ground telescope, the US-based 8.2 M Subaru Telescope, for research. This helped in the new method of detecting NLS-1 of high redshift. Earlier these galaxies were not known. The new gamma ray emitting NLS-1 is formed when the universe is 4.7 billion years old compared to the current 13.8 billion old universe.
The research was led by Dr. Shubhendu Rakshit, scientist of ARIES. It was supported by Malte Shrem (Japan), CS Stalin (IIA India), I Tanaka (US), Vaidehi S Palia (ARIES), Indrani Pal (IIA India), Zari Kotilainen (Finland) and Jaising Shin (South Korea). This research has been accepted for publication in the Monthly Notices of the Royal Stronomical Society Journal. Inspired by this discovery, Doctor Rakshit and his collaborations are interested in discovering the capabilities of the TIFR-ARIES Near Infra Red Spectro Meter on ARIES’s 3.6M Devastal Optical Telescope (DOT) to generate gamma ray emission on large red ship NLS-1 Galaxies can be detected.