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Throughout my graduate studies I have been part of the collaborations eBOSS (extended Baryon Oscillation Spectroscopic Survey) and DESI (Dark Energy Spectroscopic Instrument).
In both, I have been an active member of the Lyman-α working groups. My main work is to study the effect of the metallicity (elements that are not hydrogen) in the cosmological analysis done with the Lyman-α transition.
In other words, I work with the traces of elements in the "clouds" that conform the intergalactic medium (IGM). I do it in two ways:
I see how the presence of these elements affect the shapes of correlation functions.
I study regions of quasar spectra that are not Lyman-α, where other transitions conform other forests. This gives some information of the evolution of structure and the different processes by which the IGM is enriched.
My analysis has been in both: synthetic datasets, and data from DESI Y1 (year 1).
In synthetic datasets, I tuned the metal absorption of four silicon lines that strongly affect the BAO measurement and the shape of the Lyman-α flux correlation functions. I have also worked in the analysis of the CIV forest to define if this can be a good BAO tracer with the data of the complete DESI survey.
In data, I analyze the contamination of four transitions (MgII, CIII, CIV, SiIV) in the Lyman-α forest, and the cross-correlations of the flux of these metal forests (plus Lyman-β) with quasars.
I participated in the search of an observation strategy for the first year of DESI operations (internally known as "wide vs. deep")
I have also contributed in the development and debugging of the codes LyaCoLoRe, Desisim/QuickQuasars, Picca, and Vega.
I have also contributed in projects that are not in the Lyman- and IGM research. I have served in the Survey Validation campaigns, where I analyzed several spectra taken by DESI and verified that the objects were correctly classified, and I contributed with several observation shifts (in person and remotely). I am lucky to say that I was one of the last scientists to observe at the 4M Mayall for the z-Legacy Survey, and one of the first to observe in the official DESI operations.
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