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Universidad de Salamanca
María Jesús Santos Sánchez
Facultad de Ciencias - Departamento Física Aplicada
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Why do galaxy sizes matter? by Fernando Buitrago

Speaker: Fernando Buitrago (Universidad de Valladolid)Title: Why do galaxy sizes matter?

Abstract: During the last decades, galaxy sizes have been a very active research topic in Astrophysics given the fact that they are one of the few direct observables from objects in the distant Universe. In this seminar, I will review the different approaches that were traditionally taken, showing what we have learned about how our Universe works over time. However, galaxies are fuzzy objects, and as such it is very hard to assign sizes to them. One would naively think that by observing for larger integration times and/or by using better telescopes these objects will grow bigger and bigger. I will prove you wrong by describing a novel physically-motivated size proxy (the galaxy edges or galaxy truncations) that my team GEELSBE (Galactic Edges and Euclid in the Low Surface Brightness Era) at the University of Valladolid is studying. We have utilized the deepest pointings of the Hubble Space Telescope (while now using the James Webb Space Telescope and Machine Learning algorithms) to obtain the evolution of this parameter last 8 Gyr promising to give us first hand information not only about the baryonic mass assembly but also the dark matter halo evolution.

Date and time:  Wednesday, June 05, (13:00)gracus_logo2

Room: Aula V, Edificio Trilingüe, Facultad de Ciencias, Universidad de Salamanca

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Validation of a 3D Local-Scale Adaptive solar Radiation Model

“Validation of a 3D Local-Scale Adaptive Solar Radiation Model by Using Pyranometer Measurements and a High-Resolution Digital Elevation Model”
Rodríguez, E., García-Ferrero, J., Sánchez-Aparicio, M., Iglesias, J. M., Oliver-Serra, A., Santos, M. J., Andrés-Anaya, P., Cascón, J.M., Montero García, G., Medina, A., Lagüela S., Asensio, M.I., & Montenegro Armas, R.
Sensors,  2024, 24(6), 182


Orgullosos de este trabajo de colaboración entre investigadores de diferentes áreas de conocimiento,  departamentos  y universidades:

  • Instituto Universitario de Sistemas Inteligentes y Aplicaciones Numéricas en Ingeniería (SIANI), Universidad de Las Palmas de Gran Canaria, 35017 Las Palmas de Gran Canaria, Spain
  • Instituto Universitario de Física Fundamental y Matematicas (IUFFyM), Universidad de Salamanca, 37008 Salamanca, Spain
  • Departamento de Física Aplicada, Universidad de Salamanca, 37008 Salamanca, Spain
  • Departamento de Ingeniería Cartográfica y del Terreno, Universidad de Salamanca, 37008 Salamanca, Spain
  • Departamento de Matemática Aplicada, Universidad de Salamanca, 37008 Salamanca, Spain
  • Departamento de Economía e Historia Económica, Universidad de Salamanca, 37007 Salamanca, Spain.

Todo un lujo.


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Award for Secondary School Teaching


The European Physical Society (EPS), acting through its Physics
Education Division (PED) *grants the **Award for Secondary School
Teaching *subject to the following criteria:* The award should be made to an individual high school teacher. (It
is not a team award.)
* The award should recognize work that directly affects students of
   physics in one or more European secondary schools. (Secondary school
may be broadly interpreted, but specifically excludes primary
schools and universities.)
* The award should recognize a specific contribution to teaching,
particularly one that might be taken up in a range of countries. (It
is not a lifetime achievement award, nor is it an award for research
into teaching, though teaching may be broadly interpreted and should
   include activities that encourage students to take up the study of
   physics or improve access to the study of physics.)
* _Particular consideration will be given in 2021 for work in remote
or on-line teaching in physics._The award consists of a certificate and the amount of  1,000 (one
thousand euros)._It is intended that the award will be presented during the GIREP
Seminar on Teacher Education and Development, which is currently
scheduled to take place in November 2021 at the University of Malta,
travel restrictions permitting_. _The award winner is normally provided
with additional funding to allow his or her attendance._

The award committee consist of four ordinary members and a chair, all
nominated by the EPS Physics Education Division.

A single nomination is invited from each National Physical Society
belonging to the EPS in the year of the award.

The nomination should be no longer than 500 words and should be in English.

The Societies should be particularly encouraged to nominate individuals
who have already won a national prize or award. The Societies should
also be encouraged to consult national associations of physics/science
teachers regarding suitable candidates.

The closing date for nominations is on 28th May 2021.

Thank you.

Best regards,

David Lee, EPS Secretary General,
David Sands, EPS PED chairperson.

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Grants for 2019 Summer Research Programme ASTRON & VLBI ERIC (JIVE)

The Netherlands Institute for Radio Astronomy (ASTRON) and the Joint
Institute for VLBI ERIC (JIVE) announce the availability of a limited
number of grants for their 2019 Summer Research Programme. The
Programme enables astronomy students (graduate or advanced
under-graduate) to spend the summer (10-12 weeks) at the institute in
Dwingeloo in the Netherlands, conducting astronomical research under
the supervision of ASTRON and JIVE staff members.

Possible topics of study include radio galaxies and quasars, aspects
of observational cosmology, continuum and line mission/ absorption
from normal and starbust galaxies, faint radio sources, pulsar timing,
pulsar searching, fast radio bursts, molecular clouds, cosmic
magnetism, as well as algorithm development. The actual project the
successful candidate will work on will be defined after arrangement
with the local supervisor. The programme is not aimed at engineering
or electronics students.

More information can be found at:

Applications for the programme should be sent via the registration
form at this website. Deadline for applications is 1 February 2019.

Job ad can also be found at AAS Job register:

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Masterclass Science on Stage

Here you can find a file with the presentation of the masterclass.

Presentation masterclass

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Video “Listening to gravity”

Flickr Video
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Data from the experiences

Single sheet for making experimental data discussed in previous entries.

Data from the experiences

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Advantages of the experiences

Advantajes of the experiences

Special qualities that make this presentation spectacular:

  • The simplicity and accessibility to reproduce these experiences.
  • Very high accurate measurements of time (of the order of 10-4 s).
  • It provides an alternative procedure to the software that is presented by the commercial laboratories for the same purpose.
  • Faster measurements than using standard methods.
  • Possibility of enrichment with other associated physical phenomena to each experience.
  • Importance of including new technologies in the education of sciences.
  • The major advantages are the very low cost of the proposed experiments and they are easy to understand for students due to their familiarity with the software when it is used ‘properly’ for editing musical tracks.
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Timing the oscillations of a mass-spring system (paper)

Paper published in “The Physics Education”

Spring - Magnet

Spring - Magnet

“Timing oscillations of a mass‐spring system” J. A. White, M. J. Santos, A. González y S. Velasco. Revista: Physics Education”, 46, p. 378-379, July 2011.

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Parabolic Throw (paper)

Paper published in “The Physics Teacher”:

Parabolic Throw

Parabolic Throw

Parabolic Throw Paper

J.A. White, A. Medina, F.L. Román & S. Velasco, “A measurement of g listening to falling balls”, The Physics Teacher, vol 45, pp. 175-177, 2007.

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