Tatiana Pavlidou

Current Work

Protostar identification: As a postdoc at the University of Vienna, in my current research I am exploring a method of identifying very young sources, based on their photometric properties from Herschel and Spitzer data currently focusing on the region of Perseus. From my results arises a potential link between a subset of Class 0 sources and hot corinos whose spectra are characterised by an abundance of complex organic molecular lines.

Research Experience

Stellar populations

In October 2021, I completed my PhD at the University of St. Andrews in Scotland under the supervision of Dr. Aleks Scholz. In my PhD thesis, entitled “Star Formation in the Perseus Complex: A tale of seven clusters” I explore the structure of the star-forming region of Perseus. Apart from the two well studied clusters, IC 348 and NGC 1333 the complex is associated with five additional clusters previously not reported in literature. I report the discovery of these five additional clusters and explore their ages and their kinematic properties in my MNRAS paper published in 2021. To understand the star formation events that took place in this complex, in my thesis work I combined data from Gaia DR2, 2MASS, WISE, Spitzer and Planck.

I built reliable membership lists using the Gaia DR2 measurements in position, proper motion and parallax as criteria to classify sources as members of a given cluster and of the dispersed population of the complex.
I investigated the youth of individual sources within the clusters, as well as outside, using a combination of youth indicators from Gaia, WISE and Spitzer photometry and based on a cold dust emission map from Planck data.
I constructed the system Mass Functions (MFs) for the seven clusters, which included determining the masses of the individual cluster members using 2MASS J, H, K photometry and stellar evolutionary models. This procedure showed how (stellar) mass is distributed in the clusters revealing little to no mass-segregation in all cases. I compare the MF slopes in the regime of 0.08 < m/M☉ < 0.5 in which my samples are complete. The slopes of the seven clusters are in an overall agreement and range between 0.5 and 1.3.

Machine Learning

Between March 2020 and August 2020, I completed a placement as a Research Associate at the European Southern Observatory (ESO) in Garching, Germany, collaborating with Dr. Nima Sedaghat, Dr. Martino Romaniello and Dr. Felix Stoher. My work was part of the ESCAPE project and included improving and training a neural network (NN) to classify spectra of galaxies in the archive data of HARPS and UVES instruments. I used bash commands, jupyter notebooks and the NN output to collaboratively create a user-friendly search engine for galaxy spectra.

Selected Recent Conference Talks

June 2022

EAS Conference, Valencia, Spain

Contributed Talk
The Class 0 population in Perseus using Herschel

June 2022
December 2021


Online Talk
Star Formation in Perseus using Gaia DR2;
a tale of seven clusters

December 2021
September 2019

CRETE III Conference, Crete, Greece

Poster Presentation
Star Formation in Perseus using Gaia DR2

September 2019


Substructure in the Perseus Molecular Cloud using Gaia DR2
T.Pavlidou, A. Scholz, P.S. Teixeira
published in MNRAS, submitted in arXiv doi:10.1093/mnras/stab352