110 citations · 311 across the 9 of their papers we have counts for
9 papers
Strong discrete Morse theory
Ximena L. Fernández
The purpose of this work is to develop a version of Forman's discrete Morse theory for simplicial complexes, based on internal strong collapses. Classical discrete Morse theory can…
Intrinsic persistent homology via density-based metric learning
Ximena Fernández, Eugenio Borghini, Gabriel Mindlin +1
We address the problem of estimating topological features from data in high dimensional Euclidean spaces under the manifold assumption. Our approach is based on the computation of…
Morse theory for group presentations
Ximena Fernández
We introduce a novel combinatorial method to study -transformations of group presentations or, equivalently, 3-deformations of CW-complexes of dimension 2. Our procedure is…
CHILES: HI morphology and galaxy environment at z=0.12 and z=0.17
Kelley M. Hess, Nicholas M. Luber, Ximena Fernández +27
We present a study of 16 HI-detected galaxies found in 178 hours of observations from Epoch 1 of the COSMOS HI Large Extragalactic Survey (CHILES). We focus on two redshift ranges…
BUDHIES III: The fate of HI and the quenching of galaxies in evolving environments
Yara L. Jaffé, Marc A. W. Verheijen, Chris P. Haines +13
In a hierarchical Universe clusters grow via the accretion of galaxies from the field, groups and even other clusters. As this happens, galaxies can lose their gas reservoirs via d…
Early Science with the Large Millimeter Telescope: COOL BUDHIES I - a pilot study of molecular and atomic gas at z~0.2
Ryan Cybulski, Min S. Yun, Neal Erickson +20
An understanding of the mass build-up in galaxies over time necessitates tracing the evolution of cold gas (molecular and atomic) in galaxies. To that end, we have conducted a pilo…
Discovery of a Small Central Disk of CO and HI in the Merger Remnant NGC 34
Ximena Fernández, A. O. Petric, Francois Schweizer +1
We present CO(1-0) and HI(21-cm) observations of the central region of the wet merger remnant NGC 34. The Combined Array for Research in Millimeter-wave Astronomy (CARMA) observati…
A Pilot for a VLA HI Deep Field
Ximena Fernández, J. H. van Gorkom, Kelley M. Hess +12
High-resolution 21-cm HI deep fields provide spatially and kinematically resolved neutral gas maps at different redshifts, which are key to understanding galaxy evolution across co…
The Origin and Distribution of Cold Gas in the Halo of a Milky Way-Mass Galaxy
Ximena Fernández, M. Ryan Joung, Mary E. Putman
We analyze an adaptive mesh refinement hydrodynamic cosmological simulation of a Milky Way-sized galaxy to study the cold gas in the halo. HI observations of the Milky Way and othe…