Blog
La hoguera vanidosa
El Big Bang era un estúpido. Se creía una gran explosión y presumía de que nadie en el Universo le superaba en magnitud. Vanidoso sin límite, sus alardes le...
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PublicaciónLarge Scale Absorbers in the Environment of High-z Radio-GalaxiesWe discuss a number of interesting questions that arise from studies of extended absorbers observed in high redshift radio-galaxies. We propose to carry out 2-D...
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PublicaciónLarge SDSS Quasar Groups and their Statistical SignificanceWe use a volume-limited sample of quasars in the Sloan Digital Sky Survey (SDSS) DR7 quasar catalog to identify quasar groups and address their statistical...
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PublicaciónLensed Type Ia Supernova "Encore" at z = 2: The First Instance of Two Multiply Imaged Supernovae in the Same Host GalaxyA bright (m F150W,AB = 24 mag), z = 1.95 supernova (SN) candidate was discovered in JWST/NIRCam imaging acquired on 2023 November 17. The SN is quintuply imaged...
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PublicaciónLensing without borders - I. A blind comparison of the amplitude of galaxy-galaxy lensing between independent imaging surveysLensing without borders is a cross-survey collaboration created to assess the consistency of galaxy-galaxy lensing signals (ΔΣ) across different data sets and...
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PublicaciónLensWatch. II. Improved Photometry and Time-delay Constraints on the Strongly Lensed Type Ia Supernova 2022qmx ("SN Zwicky") with Hubble Space Telescope Template ObservationsStrongly lensed supernovae (SNe) are a rare class of transient that can offer tight cosmological constraints that are complementary to methods from other...
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PublicaciónLimiting the Abundance of LIGO/Virgo Black Holes with Microlensing Observations of Quasars of Finite SizeWe present a simple but general argument that strongly limits the abundance of primordial black holes (PBHs) (or other unknown population of compact objects)...
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PublicaciónLimits on Hot Intracluster Gas Contributions to the Tenerife Temperature Anisotropy MapWe limit the contribution of the hot intracluster gas, by means of the Sunyaev-Zeldovich effect, to the temperature anisotropies measured by the Tenerife...
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PublicaciónLines in the cosmic microwave background spectrum from the epoch of cosmological helium recombinationThe main goal of this work is to calculate the contributions of bound-bound transitions of helium to the cosmological recombination spectrum. We show that...