Refining the Cepheid distance scale
Lead Research Organisation:
Liverpool John Moores University
Department Name: Astrophysics Research Institute
Abstract
Refining the Cepheid distance scale
People |
ORCID iD |
| David Bersier (Primary Supervisor) | |
| Kevin Tsang (Student) |
Studentship Projects
| Project Reference | Relationship | Related To | Start | End | Student Name |
|---|---|---|---|---|---|
| ST/N504154/1 | 01/10/2015 | 31/03/2021 | |||
| 1693893 | Studentship | ST/N504154/1 | 01/10/2015 | 31/03/2019 | Kevin Tsang |
| Title | Calibrated Sloan-band Catalogue of ~1.4 million M33 stars |
| Description | A catalogue of almost 1.4 million stars in Messier 33 with Sloan g, r, and i-band magnitudes and various other photometric parameters. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2018 |
| Provided To Others? | Yes |
| Impact | Empirical Sloan-band Leavitt Laws were created with the dataset and shown to be consistent with semi-empirical determinations in the literature. With the Leavitt Laws, a distance modulus of 24.57 was obtained for M33. By fitting Leavitt Laws to Cepheids binned into galactocentric annuli, a dependence between galactocentric radius and Cepheid brightnesses was observed and measured. An independent distance determination with the Tip of the Red Giant Branch method yields a distance that is compatible with that determined from Cepheids. |
| Title | Calibrated Sloan-band M33 Photometry |
| Description | A catalogue of over 500,000 stars in Messier 33 with Sloan g, r, and i-band magnitudes. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2018 |
| Provided To Others? | Yes |
| Impact | Created a set of preliminary period-luminosity relations in the Sloan g, r, and i-band. |