Abstract Details
| Name: Shylaja B S Affiliation: Jawaharlal Nehru Planetarium, High Grounds, Bengaluru Conference ID: ASI2025_335 Title : Search for records of eruptions of T Coronae Borealis in the 17th and18th centuries Authors and Co-Authors : Shylaja B S Abstract Type : Poster Abstract Category : Stars, Interstellar Medium, and Astrochemistry in Milky Way Abstract : The recurrent nova T Coronae Borealis is expected to erupt shortly as inferred from recorded eruptions of 1946 and 1866 and a periodicity of 80 years. Schaefer, 2023 provided the earliest record in 1217 and another in 1787. We searched for records the star dials of astrolabes. The exhaustive catalogue (Sarma, 2023) provides details on the star dials along with unidentified and misidentified stars. We were able to zero in on four astrolabes; however, two of them serve as possible records. There are many doubtful identifications on star globes as well. The difficulties associated with this unconventional source of star lists and overcoming the disadvantages of poor resolution are discussed. The results point to one eruption just before 1641 and another of 18th century. References: Sarma S., ‘A Descriptive Catalogue of Indian Astronomical Instruments’, (2023) online https://srsarma.in/catalogue.php Schaefer, B. A., “The B & V light curves for recurrent nova T CrB from 1842–2022, the unique pre- and post-eruption high-states, the complex period changes, and the upcoming eruption in 2025.5 ±1.3”, Monthly Notices of the Royal Astronomical Society, (2023), Volume 524, Pages 3146-65 |