Dr. Bartłomiej Zgirski

Dr. Bartłomiej Zgirski is from Warsaw, Poland. In 2022, he defended his PhD thesis at the Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences.

By working with Dr. Wolfgang Gieren, Dr. Zgirski continues his research focusing on the calibration of the cosmic distance scale through distance determinations to nearby galaxies using different methods and, in parallel, based on parallaxes of standard candles located within the Milky Way. He has been working with various distance indicators such as: classical Cepheids (the Leavitt law); carbon stars (the JAGB method); RR Lyrae (period-luminosity-metallicity relations, the Baade-Wesselink method). He has also been using Red Clump stars for the purpose of the establishment of reddening maps for the Magellanic Clouds.

His observational experience covers work with the following instruments: IRSF at South African Astronomical Observatory, IRIS at the Cerro Armazones Observatory, HARPS at the La Silla Observatory, MIKE at the Las Campanas Observatory, UVES at the Cerro Paranal Observatory. The technical involvement includes acquisition, calibration, reduction, and analysis of infrared and optical photometric data including the development of custom reduction pipelines, as well as dealing with spectroscopic data in order to obtain radial velocity curves of pulsating stars. He has also been working with data from space telescopes such as Kepler and Gaia.

As a member of the Araucaria project, he has been taking part in the development of the Cerro Armazones Observatory located in the Chilean Atacama desert.

Research interests

1. the cosmic distance ladder,
2. distance determinations in the local Universe
3. pulsating stars,
4. period-luminosity relations for pulsating stars in nearby galaxies,
5. carbon stars as distance indicators,
6. The Baade-Wesselink method for Cepheids and RR Lyrae stars.

• Office: 619
• email: bzgirski (at) astro (dash) udec (point) cl