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| The cover and backcover of my PhD thesis. The graph in the backcover depicts the Li envelopes that I obtained as the main final results of this project. |
Back in Spring 2022, I defended my thesis on stellar Astrophysics, as I talk about in this post 🌟🪐🔭📚📐📊. During my doctorate years, and also during the first couple of years after my defense, I have been presenting the results of my PhD project in poster and presentation form for several scientific reunions, conferences, meetings and seminars: For example for the 2022 Scientific Reunion of the Spanish Astronomical Society (XV Reunión Científica de la SEA), or for open-doors seminars at the Universidad Complutense de Madrid (UCM). You can also find most of these on my ORCID here.
In these posters and presentations I also talk about my two first-author papers, which contain a sizeable part of the analysis and results that I worked on for my PhD project since 2015, corresponding to the full contents of chapter 2 of the written thesis. As I explain in more detail in the post on my thesis, the aim of my project, entitled The lithium-age relation: Calibration with open clusters and associations, was to study lithium (Li) as an age indicator for pre- and main-sequence late-type stars (FGKM) with the ultimate objective of calibrating an empirical Li-age relation that would help to estimate age ranges for both field stars and other open clusters. I worked with a large sample of 42 stellar open clusters and associations using data from the Gaia-ESO Survey (GES) and the Gaia mission.
The two published papers describe the thorough membership analysis that we conducted to obtain lists of robust candidate members for each cluster, making use of all available parameters derived from GES spectroscopic observations, firstly from the iDR4 data release (Paper I, published in 2020, including the preliminary analysis of 20 open clusters), and then using the final iDR6 data release for the second paper (Paper II, published in 2024), which encompasses 42 open clusters and associations and contains the final analysis and cluster membership included in the thesis. Both papers describe in detail the various criteria used to obtain the lists of cluster candidates, from kinematics to the analysis of the astrometry and photometry provided by Gaia, gravity indicators, metallicity, and Li content.
All membership analyses were additionally complemented with detailed
bibliographical searches and contrasted with existing membership studies
which used data from Gaia to arrive to their own lists of cluster members. Apart from the bibliography and citations, both papers also include extensive appendices with detailed individual notes and all graphs and diagrams for each open cluster, as well as long tables which detail the results of all membership criteria for each and every star in all sample clusters, list all final cluster members, and also indicate individual cases of interest, such as binary stars or Li-rich giants.
Apart from these two articles that were published, a third and final article completing the analysis and results of the thesis project exists in draft and revised form, but currently remains unpublished. All future work for this project, and my Astrophysics research activity in general, is also on hold for the moment being (academia, am I right 🙃), and my career has currently veered towards the education and teaching fields, so we'll see how the future goes in all of these respects. In the meantime, you can check out both of my first-author papers down below, including links and the appended PDFs 👇.
PAPER I: Gutiérrez Albarrán et al, 2020: ADS; DOI (A&A); PDF
Appended PDF here:
PAPER II: Gutiérrez Albarrán et al, 2024: ADS; DOI (A&A); PDF
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| First page of my second first-author paper |
And I also mention these papers in the PDF presentations for the 2022-23 open-doors seminars on Astrophysics science research at the UCM, which also include a summary of my thesis project:
