My list ADS list of publications    This and that

My ORCID is  0000-0003-1123-6003 

Grants currently active:  Spanish Ministry of Science and Innovation, project PID2019-107408GB-C43 (ESTALLIDOS), and Gobierno de Canarias through EU FEDER funding, project PID2020010050.  


These pages are meant to contain an index of my research work.  They are very uneven, and should be considered as work in progress 



The mystery of the runaway supermassive black hole, solved
Here we show that the putative runaway super-massive black hole creating a stellar trail (by van Dokkum et al. 23) seems to be an edge-on galaxy (Sanchez Almeida, Montes, & Trujillo 23).
This is the IAC press release in English y esta otra en Español

This result have had quite some impact on the public media (English -- Spanish)

This is the

Explicacion en español




Intermediate mass black holes (IMBHs) are both needed en extremely elusive. Needed to explain the formation of supermassive BHs (like the one existing in the center of our galaxy) and elusive because only a few tens of them are known (e.g., Mezcua17, Greene+20). Looking for someting else, we think we have discovered a completely new family o them.  

The IAC produced a press release with the finding (click on the image):

An annimation illustrating the idea is in here, and this is a link to the actual paper 


A serious problem for MOND?

If MOND modifies Newton-Einstein gravitational law al low gravitational potentials to explain motions in galaxies without invoking dark matter. Good idea, but it has problems ... The last one is in the paper:   



Polytropes are everywhere. They seem to be the maximum entropy solutions of self-gravitating systems. In this  paper that the dark matter cores observed in dwarf galaxies are polytropes.

This is press release trying to explain the implications of this fact. 

En español aqui y aqui .  



The ebook with the lectures and the lecture notes of tge XXX IAC Winter School on Big Data In Astronomy is already out.

Finalmente J Valderrama y Aguilar tiene una entrada en la wikipedia. (Gracias a Pedro J. Hernandez!)

Transparencias para ser usadas en la divulgacion sobre Valderrama (odp original. ppt y pdf, copias)

Conferencia en el IAC en el que oficialmente presentamos al astronomo Juan Valderrama y aguilar

Evidence of a White-Light Flare on 10 September 1886 (Vaquero et al. 2017, SPh, 292, 33). 

A fantastic outreach paper describing the importance of this flare and  the guy that discovered it has been written by Enrique Sacristán for the 'Agencia Española para la Ciencia y La Tecnología.'

Another fantastic outreach paper in english I just came acrross....

This flare is the third one ever observed, and was discovered by a 17 yr old boy from Santa Cruz de Tenerife called Juan Valderrama y Aguilar. Who was this guy? If you are interested ... stay tunned. We (M. Vázquez and I) will publish his atonishing bio soon.  


This is a link to the 'Cuadernos de Valderrama', his handwritten observation logbook with notes and dwawings. Beautiful. 



 Finally, the book with the lectures given during the XXV IAC Winter School on Cosmic Magnetic fields is out.

Monograph on Gas Accretion onto Galaxies, Astrophysics and Space Science Library, eds. A. J. Fox & R. Davé, to be published by Springer, 2017. 

I wrote one of the Chapters 'Gas Accretion and Star Formation rates' 

Believe it or not, we (Amanda+) got observing time at the 4.2m WHT to check whether

a signal was produced by an alien civilization


Paper on the kinematics of the magnificent 10. Amanda's 1st paper. We got huge mass loading factors!!!!! (see the figure). This is both expected and surprising. 



In depth study of this beautifull tadpole galaxy

This is a interview to Debra and Bruce  Elmegreen about it in New Scientist, and this other is the link to the paper

In addition, there is a press release of the Hubble Space Telescope Science Institite  (STScI-2016-23), and the IAC also publised its own press release (in spanish)

The news appeared in the mass media, e.g., dailymail(UK),  USAToday,  and may others

2018: It is part European Space Agency 'Space In Images' see here

   Debra and Bruce at the IAC (2014)


The magnificent 10 letter is OUT !

Like cosmic spiders, dwarf galaxies have been caught feasting on blobs of gas spread across a hidden web...

This is the starting sentence of a short interview in New Scientist about the relevance of the work.

It is also a paper highlighted by the American Astronomical Society  in this webpage

There is finally this press release at the IAC website (Spanish). Muy Interesante

google 'como se alimenta una galaxia'


Recipe for interpreting galaxy spectra

The recipe is detailled in this ApJ paper

The Sun is a miasma of incandescent plasma   ... even kids know.


Cartoon specially devoted to our paper. 


Automatic Spectroscopic K-means based classification of galaxies (ASK)


click on the image to get a large jpg version, and click here to get ps version

Link to the page with the ASK stuff

Direct access to ASK ftp site


OSIRIS GTC wavelength calibration




free counter