RT info:eu-repo/semantics/bachelorThesis T1 Caracterización de la emisión de microondas en M31 usando nuevos datos del Sardinia Radio Telescope A1 Pérez Toledo, Fabricio Manuel AB In this study, we have performed the correlation analysis between the microwavesmaps and both, the far - mid infrared maps and the parameters maps in the Andromedagalaxy. For this aim, we have used intensity maps from the Sardinia Radio Telescopeand public data from both the Herschel Space Observatory and Spitzer Space Telescope. The parameters maps used were created by combining public data and modelsproduced by DustEM. There are four sections: the introduction, the methodology, theresults and the conclusions. In the first section, it’s established the basic knowledge.We have begun by explaining what interstellar medium (ISM) is as well as the phenomena that take place in its inner. Those include: the temperature, composition andrelative abundance for different dust grain types which are found in the medium. Next,we present various emission mechanisms focusing on the anomalous microwave emission. Later on, we gather up and display information about the Andromeda galaxy,explaining its suitability to be our object of study, justifying the reason for us to chooseit over other galaxies.In the second one, we have explained the basic characteristics of the radio telescopethat we have used for the C-band and K-band observations. This is followed by theobservation, planning and measurement strategies of the calibration sources. Then, wehave described the treatment carried out on the observations, as well as the modelsobtained through DustEM and the archive maps that we have selected. In the lastpart of this sextion we have detailed in depth the process to adjust the archive mapsto our microwave maps. To close this section, we have added an explanation on howthe correlations between maps have been made, as well as the procedure followed usingboth the DustEM and the infrared maps in order to obtain the parameter maps.In the third section - which can be divided into two smaller blocks - the results ofthis study are presented. We have started the first one by finding out the correlationwhich exists between both microwave and infrared maps. This has been done havingthe adjusted maps as references. We have obtained, in most of the results of thecorrelations, values of the Pearson’s coefficient around 0.6 (for the ring’s region), 0.4(for the disc’s area) and 0.2 (for the nucleus). However, for the nucleus we have gotother values in the maps of 24 and 100 m, for which the values have been around 0.7.In the second one, the correlation between the SRT and both the BG and ISRF maphave shown values for the coefficient of Pearson around 0.7 in the ring and 0.5 in thedisc. For the nucleus in the ISRF, the value has been of 0.7 (being the same as it wasfor the ring), but the nucleus hasn’t show any correlation with the BG. For the VSGmap we have found a correlation of around 0.4 with the disc.Finally, in the fourth and last section, we have resolved that the correlation betweenthe SRT and parameters maps indicate that the emission of microwaves is mainlyrelated with the intensity of the radiation field, with the abundance of BG and withthe dust’s temperature. Regarding the relation between the abundance of VSG andthe microwave emission, it has only been noticed in the disc. This results are coherentwith the ones obtained in the work of Tibbs et al. (2012). On the other hand, theresults for the dust’s species haven’t been conclusive, due to the results may have beenaffected by diverse factors. Therefore, it’s concluded that, for improving the outcomes,it would be required that we rose the range of values (used for the dust’s species), usedanother adjustment technique or a more accurate and precise model. YR 2019 FD 2019 LK http://riull.ull.es/xmlui/handle/915/16253 UL http://riull.ull.es/xmlui/handle/915/16253 LA es DS Repositorio institucional de la Universidad de La Laguna RD 28-mar-2024