Date : 22-03-2017
Time : 16:00:00
Speaker : Dr. Kinsuk Acharyya
Reader, Planetary Sciences Division
Area : DEAN'S OFFICE
Venue : K. R. Ramanathan Auditorium, PRL
Observations reveal that our Universe is surprisingly molecular. Molecules are found almost everywhere starting from the high-redshift galaxies to the nearby solar system. More than 200 different gas phase molecules and around 20 molecular species on the dust grain surface has been detected in the various astrophysical environments. Many of these molecules are organic, and therefore important astro-biologically. These molecules range in complexity from diatomic H2 to a 15-atom linear nitrile, HC13N, and many of these molecules are quite unusual by terrestrial standards. In the gas phase, H2 is the most abundant molecule by far, with CO in the second position, four order of magnitude lower. On the other hand, water dominates on the dust grain surface. More complex molecules are even less abundant – at least 4 to 10 orders of magnitude lower than H2. These molecules are very important because they could be the precursors of more complex biomolecules including simple amino acids, such as glycine. The possible molecular precursors of larger organic molecules, such as CH4, H2O, NH3, HCOOH, CH3COOH are all detected in the various astrophysical environments. Thus understanding how these molecules are formed in the variety of astrophysical conditions are of prime importance. This talk will discuss about how these molecules are formed and ongoing research work.