Bartłomiej Zgirski

Bartłomiej Zgirski's photo

Degree: Ph.D.

Position: Post-Doc

Division: Astrophysics II (Warsaw)

ORCID: 0000-0003-1515-6107

Office: 103

Phone: +48 223296103

Personal website:


Bartłomiej Zgirski is a postdoctoral researcher at the Nicolaus Copernicus Astronomical Center (CAMK) in Warsaw where he is a member of the international Araucaria team working on the calibration of the cosmic distance scale.

He accomplished his Ph.D. studies at CAMK under the supervision of Prof. Grzegorz Pietrzyński in 2022 by defending a thesis regarding selected methods of precision distance determinations to nearby galaxies.

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 been also working with 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 with spectroscopic data in order to obtain radial velocity curves of pulsating stars. He also worked 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 Polish National Observatory – the Cerro Armazones Observatory located in the Chilean Atacama desert.

The link to his publications included by the service NASA ADS can be found here.

Research interests
  • the cosmic distance ladder,
  • pulsating stars,
  • period-luminosity relations for pulsating stars in nearby galaxies,
  • carbon stars as distance indicators,
  • the Baade-Wesselink method for Cepheids and RR Lyrae stars.