| Name: Borukote Sangadeep |
| Affiliation: OSMANIA UNIVERSITY |
| Conference ID: ASI2026_1120 |
| Title: A study on underestimation of mesospheric temperature from meteor decay times during major meteor shower |
| Abstract Type: Poster |
| Abstract Category: Sun, Solar System, Exoplanets, and Astrobiology |
| Author(s) and Co-Author(s) with Affiliation: B. Sangadeep(Osmania University), K. Chenna Reddy(Osmania Universty), G. Kishore Kumar(University of Hyderabad) |
| Abstract: The all-sky meteor radar observations at three different geographical latitudes in Northern Hemisphere indicate that the mesospheric temperature derived from meteor decay times is systematically underestimated by 20-30 K during the Geminids and Quadrantids meteor showers which have their peak on 13 December and 3 January in every year, respectively. It is noticed that such underestimation is latitudinal dependent, with more lower estimation at low latitudes than high latitudes. A very good coincidence of maximum meteor count rate and minimum of temperature estimation was observed regularly on the days of the Geminid and Quadrantids meteor showers during 2005-2022. These observations are for a specific height-lifetime distribution of the Geminids meteor trails and indicate a larger percentage of overdense trails compared to that for sporadic meteors. A consequence of this, routine estimates of mesospheric temperature during the Geminids are in fact underestimate. The observations do, however, indicate unusual properties (e.g., mass, speed, or chemical composition) of the Geminids and Quadrantids meteoroids, which are thought to be asteroidal origin. However, no such underestimation of temperature for other meteor showers. |
