Fri 01 Mar 11:30: Title to be confirmed
Abstract not available
- Speaker: Xihan Ji (Cavendish)
- Friday 01 March 2024, 11:30-12:30
- Venue: Ryle seminar room + online.
- Series: Galaxies Discussion Group; organiser: Sandro Tacchella.
Fri 16 Feb 11:30: TBD
Abstract not available
- Speaker: Alessandro Trinca (Rome)
- Friday 16 February 2024, 11:30-12:30
- Venue: Ryle seminar room + online.
- Series: Galaxies Discussion Group; organiser: Sandro Tacchella.
Fri 15 Mar 11:30: Title to be confirmed
Abstract not available
- Speaker: Boyuan Liu (IoA)
- Friday 15 March 2024, 11:30-12:30
- Venue: Ryle seminar room + online.
- Series: Galaxies Discussion Group; organiser: Sandro Tacchella.
Fri 22 Mar 11:30: Title to be confirmed
Abstract not available
- Speaker: Martin Bourne (IoA)
- Friday 22 March 2024, 11:30-12:30
- Venue: Ryle seminar room + online.
- Series: Galaxies Discussion Group; organiser: Sandro Tacchella.
Wed 31 Jan 13:15: Photometric redshifts for high-z quasars in the era of LSST
High-redshift (z>5) quasars have an important role in galaxy formation and evolution, including the growth of supermassive black holes, the coevolution of black holes and galaxies, and changes in the ionization state of the Universe. However, conventional methods for identifying high redshift quasars face challenges like high false-positive rates and require resource-intensive spectroscopic follow-up. With the upcoming data influx from optical deep wide area. imaging surveys like Vera Rubin Observatory Legacy Survey of Space and Time (LSST), the need for more efficient methodologies becomes crucial. This presentation introduces a new approach to identifying and characterising high-redshift quasars via optical and infrared Spectral Energy Distribution (SED) fitting, with an emphasis on reliable photometric redshifts. Our SED fitting method characterises quasar candidates by redshift, host galaxy contribution, intrinsic reddening, and luminosity. Additionally, we present a new empirical model for intergalactic hydrogen absorption. By comparing fits between quasar, galaxy, and star models, we are able to reduce rates of foreground contamination. The methodology presented shows promise in identifying quasar candidates and validating known objects, presenting an efficient avenue for discoveries and insights into the early Universe.
- Speaker: Katherine Kauma
- Wednesday 31 January 2024, 13:15-13:40
- Venue: The Hoyle Lecture Theatre + Zoom .
- Series: Institute of Astronomy Seminars; organiser: Hannah Uebler.
Tue 20 Feb 13:00: TBC
Abstract not available
- Speaker: Amy Tuson (Cavendish)
- Tuesday 20 February 2024, 13:00-14:00
- Venue: Ryle seminar room + ONLINE - Details to be sent by email.
- Series: Exoplanet Seminars; organiser: Dr Emily Sandford.
Fri 08 Mar 11:30: Title to be confirmed
Abstract not available
- Speaker: Ryan Hickox (Dartmouth)
- Friday 08 March 2024, 11:30-12:30
- Venue: Ryle seminar room + online.
- Series: Galaxies Discussion Group; organiser: Sandro Tacchella.
