A recent study by Farnes (2018, A&A, 620, A92) proposed an alternative cosmological model in which both dark matter and dark energy are replaced with a single...
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PublicaciónCan a negative-mass cosmology explain dark matter and dark energy?
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CharlaCan Voids and Superclusters trace Dark Energy?
I revisit the claim of Dark Energy detection after stacking CMB data on the angular position of voids and superclusters in Sloan Data. I examine the...
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PublicaciónChallenging a Newtonian prediction through Gaia wide binaries
Under Newtonian dynamics, the relative motion of the components of a binary star should follow a Keplerian scaling with separation. Once orientation effects and...
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PublicaciónCharting the Galactic Acceleration Field. I. A Search for Stellar Streams with Gaia DR2 and EDR3 with Follow-up from ESPaDOnS and UVES
We present maps of the stellar streams detected in the Gaia Data Release 2 (DR2) and Early Data Release 3 (EDR3) catalogs using the STREAMFINDER algorithm. We...
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NoticiaCientíficos del IAC completan un estudio sin precedentes de la masa de más de 500 cúmulos de galaxias
Un equipo de investigadores del grupo de Cosmología del Instituto de Astrofísica de Canarias (IAC) ha obtenido una de las medidas más precisas de la masa que...
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PublicaciónCLUES about M33: the reversed radial stellar age gradient in the outskirts of Triangulum galaxy
HST/ACS observations along the major axis of M33 show that the mean age of its stars decreases with increasing distance from the galaxy centre. Such a behaviour...
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PublicaciónClustering of intermediate redshift quasars using the final SDSS III-BOSS sample
We measure the two-point clustering of spectroscopically confirmed quasars from the final sample of the Baryon Oscillation Spectroscopic Survey (BOSS) on...
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PublicaciónClustering of intermediate redshift quasars using the final SDSS III-BOSS sample
We measure the two-point clustering of spectroscopically confirmed quasars from the final sample of the Baryon Oscillation Spectroscopic Survey (BOSS) on...
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CharlaCold streams: detectability, relation to structure and characteristics
Cold gas streaming along the dark-matter filaments of the cosmic web is predicted to be the major provider of resources for disc buildup and star formation in...