Man

Cristobal Javier Sifon Andalaft

Profesor Asociado

Pontificia Universidad Católica de Valparaíso

Valparaíso, Chile

Líneas de Investigación


Physical characterization of galaxy clusters and their implications for cosmology through the combination of optical and mm observations

Educación

  •  Astrophysics, LEIDEN UNIVERSITY. Holanda, 2016
  •  Astronomy, PONTIFICIA UNIVERSIDAD CATOLICA DE CHILE. Chile, 2012
  •  Astronomy, RIJKS UNIVERSITEIT LEIDEN. Chile, 2010

Experiencia Académica

  •   Postdoctoral Research Associate Full Time

    PRINCETON UNIVERSITY

    Princeton, Estados Unidos

    2016 - 2019

  •   Profesor Asociado Full Time

    PONTIFICIA UNIVERSIDAD CATOLICA DE VALPARAISO

    Facultad de Ciencias

    Valparaíso, Chile

    2019 - At present

Experiencia Profesional

  •   Postdoctoral Research Associate Full Time

    Princeton University

    Princeton, Estados Unidos

    2016 - 2019

Formación de Capital Humano


I have advised several students at all levels, teaching them aspects of scientific analysis and independent research skills. Specifically,

-While doing my PhD in Leiden, I co-supervised Joshua Albert's MSc thesis project trying to understand diffuse radio emission in merging galaxy clusters (2013).

-While I was a postdoctoral researcher at Princeton University, I
* Co-supervised a PhD thesis project for Naomi Robertson, then at Oxford University (UK), estimating the masses of galaxy clusters using weak gravitational lensing (2017-2019); and
* Supervised BSc student Malik Walker (now a PhD student at Johns Hopkins University) through a summer research project and his senior project (2018), analyzing the alignment of galaxies with one another due to their gravitational interactions.

-Now at PUCV I
* Am MSc thesis advisor for Camila Aros-Bunster, who since 2020 is working on characterizing distant galaxy clusters using near infrared observations. Although the sanitary emergency has prevented traveling to observatories, she has led several observing nights at the Magellan telescopes at Las Campanas Observatory. She will complete her MSc thesis during 2021.
* Supervised a summer research project with BSc student Lya Marmolejo of PUCV (2021).
* Supervised a semester-long project for Nicole Mejía, Physics and Astronomy Bachelor student at Universidad Autónoma de Honduras, through the "Central American-Caribbean Bridge in Astrophysics Program", a remote supervising program to connect Central American students with researchers all over the world (2020).


Premios y Distinciones

  •   FONDECYT Iniciación

    COMISION NACIONAL DE INVESTIGACION CIENTIFICA Y TECNOLOGICA

    Chile, 2019

    Principal Investigator. CLP 94MM (US$128,000) for 3 years to study galaxy clusters and their cosmological implications


 

Article (83)

The Atacama Cosmology Telescope: a CMB lensing mass map over 2100 square degrees of sky and its cross-correlation with BOSS-CMASS galaxies
The Atacama Cosmology Telescope: SZ-based masses and dust emission from IR-selected cluster candidates in the SHELA survey
A gravitational lensing detection of filamentary structures connecting luminous red galaxies
Atacama Cosmology Telescope: Component-separated maps of CMB temperature and the thermal Sunyaev-Zel'dovich effect
Atacama Cosmology Telescope: Constraints on cosmic birefringence
CCCP and MENeaCS: (updated) weak-lensing masses for 100 galaxy clusters
GAMA plus KiDS: empirical correlations between halo mass and other galaxy properties near the knee of the stellar-to-halo mass relation
Intrinsic Morphology of Ultra-diffuse Galaxies
KiDS plus VIKING plus GAMA: Testing semi-analytic models of galaxy evolution with galaxy-galaxy-galaxy lensing
KiDS+VIKING-450: Cosmic shear tomography with optical and infrared data
The Atacama Cosmology Telescope: a measurement of the Cosmic Microwave Background power spectra at 98 and 150 GHz
The Atacama Cosmology Telescope: arcminute-resolution maps of 18 000 square degrees of the microwave sky from ACT 2008-2018 data combined with Planck
The Atacama Cosmology Telescope: DR4 maps and cosmological parameters
The Atacama Cosmology Telescope: Weighing Distant Clusters with the Most Ancient Light
The cross correlation of the ABS and ACT maps
Weak lensing reveals a tight connection between dark matter halo mass and the distribution of stellar mass in massive galaxies
A first constraint on the average mass of ultra-diffuse galaxies from weak gravitational lensing
Galaxy Cluster Mass Reconstruction Project - III. The impact of dynamical substructure on cluster mass estimates
Galaxy Cluster Mass Reconstruction Project - IV. Understanding the effects of imperfect membership on cluster mass estimation
Galaxy Cluster Mass Reconstruction Project - IV. Understanding the effects of imperfect membership on cluster mass estimation
Herschel and ALMA Observations of Massive SZE-selected Clusters
Herschel and ALMA Observations of Massive SZE-selected Clusters
Herschel and ALMA Observations of Massive SZE-selected Clusters
Illuminating Low Surface Brightness Galaxies with the Hyper Suprime-Cam Survey
Multiwavelength scaling relations in galaxy groups=> a detailed comparison of GAMA and KiDS observations to BAHAMAS simulations
Planck Sunyaev-Zel'dovich cluster mass calibration using Hyper Suprime-Cam weak lensing
Source selection for cluster weak lensing measurements in the Hyper Suprime-Cam survey
Studying galaxy troughs and ridges using weak gravitational lensing with the Kilo-Degree Survey
Studying galaxy troughs and ridges using weak gravitational lensing with the Kilo-Degree Survey
The Atacama Cosmology Telescope: The Two-season ACTPol Sunyaev–Zel’dovich Effect Selected Cluster Catalog
The Atacama Cosmology Telescope=> The Two-season ACTPol Sunyaev-Zel’dovich Effect Selected Cluster Catalog
The first-year shear catalog of the Subaru Hyper Suprime-Cam Subaru Strategic Program Survey
The galaxy-subhalo connection in low-redshift galaxy clusters from weak gravitational lensing
Unveiling galaxy bias via the halo model, KiDS, and GAMA
A KiDS weak lensing analysis of assembly bias in GAMA galaxy groups
Complex diffuse emission in the z = 0.52 cluster PLCK G004.5-19.5
First test of Verlinde's theory of emergent gravity using weak gravitational lensing measurements
Galaxy clusters=> Falling into line
Galaxy-galaxy lensing in EAGLE=> comparison with data from 180 deg2 of the KiDS and GAMA surveys
The abundance of ultra-diffuse galaxies from groups to clusters. UDGs are relatively more common in more massive haloes
A giant radio halo in a low-mass SZ-selected galaxy cluster=> ACT-CL J0256.5+0006
Dependence of GAMA galaxy halo masses on the cosmic web environment from 100 deg2 of KiDS weak lensing data
Evidence for the thermal Sunyaev-Zel'dovich effect associated with quasar feedback
The Atacama Cosmology Telescope=> dynamical masses for 44 SZ-selected galaxy clusters over 755 square degrees
The evolution in the stellar mass of brightest cluster galaxies over the past 10 billion years
The stellar-to-halo mass relation of GAMA galaxies from 100 deg2 of KiDS weak lensing data
Weak-lensing mass calibration of the Atacama Cosmology Telescope equatorial Sunyaev-Zeldovich cluster sample with the Canada-France-Hawaii telescope stripe 82 survey
Galaxy Alignments=> Observations and Impact on Cosmology
Gravitational lensing analysis of the Kilo-Degree Survey
SALT spectroscopic observations of galaxy clusters detected by ACT and a type II quasar hosted by a brightest cluster galaxy
SALT spectroscopic observations of galaxy clusters detected by ACT and a type II quasar hosted by a brightest cluster galaxy
THE ATACAMA COSMOLOGY TELESCOPE: THE LABOCA/ACT SURVEY OF CLUSTERS AT ALL REDSHIFTS
THE ATACAMA COSMOLOGY TELESCOPE=> THE LABOCA/ACT SURVEY OF CLUSTERS AT ALL REDSHIFTS
The masses of satellites in GAMA galaxy groups from 100 square degrees of KiDS weak lensing data
A measurement of the millimetre emission and the Sunyaev-Zel'dovich effect associated with low-frequency radio sources
A measurement of the millimetre emission and the Sunyaev-Zel'dovich effect associated with low-frequency radio sources
Strong lensing analysis of PLCK G004.5-19.5, a Planck-discovered cluster hosting a radio relic at z=0.52
Strong lensing analysis of PLCK G004.5-19.5, a Planck-discovered cluster hosting a radio relic at z=0.52
WEIGHING EL GORDO WITH A PRECISION SCALE: HUBBLE SPACE TELESCOPE WEAK-LENSING ANALYSIS OF THE MERGING GALAXY CLUSTER ACT-CL J0102-4915 AT z=0.87
WEIGHING EL GORDO WITH A PRECISION SCALE=> HUBBLE SPACE TELESCOPE WEAK-LENSING ANALYSIS OF THE MERGING GALAXY CLUSTER ACT-CL J0102-4915 AT z=0.87
Cosmological parameters from pre-planck cosmic microwave background measurements
Cosmological parameters from pre-planck cosmic microwave background measurements
Subaru weak lensing measurement of a z=0.81 cluster discovered by the Atacama Cosmology Telescope Survey
Subaru weak lensing measurement of a z=0.81 cluster discovered by the Atacama Cosmology Telescope Survey
THE ATACAMA COSMOLOGY TELESCOPE: DYNAMICAL MASSES AND SCALING RELATIONS FOR A SAMPLE OF MASSIVE SUNYAEV-ZEL'DOVICH EFFECT SELECTED GALAXY CLUSTERS
THE ATACAMA COSMOLOGY TELESCOPE: PHYSICAL PROPERTIES OF SUNYAEV-ZEL'DOVICH EFFECT CLUSTERS ON THE CELESTIAL EQUATOR
THE ATACAMA COSMOLOGY TELESCOPE: RELATION BETWEEN GALAXY CLUSTER OPTICAL RICHNESS AND SUNYAEV-ZEL'DOVICH EFFECT
The Atacama Cosmology Telescope: Sunyaev-Zel'dovich selected galaxy clusters at 148 GHz from three seasons of data
The Atacama Cosmology Telescope: the stellar content of galaxy clusters selected using the Sunyaev-Zel'dovich effect
THE ATACAMA COSMOLOGY TELESCOPE=> DYNAMICAL MASSES AND SCALING RELATIONS FOR A SAMPLE OF MASSIVE SUNYAEV-ZEL'DOVICH EFFECT SELECTED GALAXY CLUSTERS
THE ATACAMA COSMOLOGY TELESCOPE=> PHYSICAL PROPERTIES OF SUNYAEV-ZEL'DOVICH EFFECT CLUSTERS ON THE CELESTIAL EQUATOR
THE ATACAMA COSMOLOGY TELESCOPE=> RELATION BETWEEN GALAXY CLUSTER OPTICAL RICHNESS AND SUNYAEV-ZEL'DOVICH EFFECT
The Atacama Cosmology Telescope=> Sunyaev-Zel'dovich selected galaxy clusters at 148 GHz from three seasons of data
The Atacama Cosmology Telescope=> the stellar content of galaxy clusters selected using the Sunyaev-Zel'dovich effect
Evidence of Galaxy Cluster Motions with the Kinematic Sunyaev-Zel'dovich Effect
Evidence of Galaxy Cluster Motions with the Kinematic Sunyaev-Zel'dovich Effect
THE ATACAMA COSMOLOGY TELESCOPE: ACT-CL J0102-4915 "EL GORDO," A MASSIVE MERGING CLUSTER AT REDSHIFT 0.87
The Atacama Cosmology Telescope: Cross-correlation of cosmic microwave background lensing and quasars
THE ATACAMA COSMOLOGY TELESCOPE: HIGH-RESOLUTION SUNYAEV-ZEL'DOVICH ARRAY OBSERVATIONS OF ACT SZE-SELECTED CLUSTERS FROM THE EQUATORIAL STRIP
THE ATACAMA COSMOLOGY TELESCOPE=> ACT-CL J0102-4915 "EL GORDO," A MASSIVE MERGING CLUSTER AT REDSHIFT 0.87
The Atacama Cosmology Telescope=> Cross-correlation of cosmic microwave background lensing and quasars
THE ATACAMA COSMOLOGY TELESCOPE=> HIGH-RESOLUTION SUNYAEV-ZEL'DOVICH ARRAY OBSERVATIONS OF ACT SZE-SELECTED CLUSTERS FROM THE EQUATORIAL STRIP
GMRT 610 MHz observations of galaxy clusters in the ACT equatorial sample
34
Cristobal Sifon

Profesor Asociado

Instituto de Física

Pontificia Universidad Católica de Valparaíso

Valparaíso, Chile

16
Rolando Dünner

Associate Professor

Astrophysics

Pontificia Universidad Católica de Chile

Santiago, Chile

9
Leopoldo Infante

Professor

PONTIFICIA UNIVERSIDAD CATÓLICA DE CHILE

Santiago, Chile

7
Luis Barrientos

Associate Professor, Director

Institute of Astrophysics

PONTIFICIA UNIVERSIDAD CATOLICA DE CHILE

Santiago, Chile

2
Paula Aguirre

Profesor Asistente

Escuela de Ingeniería

Pontificia Universidad Católica de Chile

Santiago, Chile

1
Loïc Maurin

Investigador Postdoctoral

PONTIFICIA UNIVERSIDAD CATOLICA DE CHILE

Chile

1
Gaspar Galaz

Profesor Titular, Director, Instituto de Astrofísica

PONTIFICIA UNIVERSIDAD CATÓLICA DE CHILE, FACULTAD DE FÍSICA, DEPARTAMENTO DE ASTRONOMÍA Y ASTROFÍSICA

Santiago, Chile

1
Thomas Puzia

Associate Professor

Institute of Astrophysics

PONTIFICIA UNIVERSIDAD CATOLICA DE CHILE - DPTO. ASTRONOMIA Y ASTROFISICA

Santiago, Chile

1
Evelyn Johnston

Assistant professor

Nucleo de Astronomia

Universidad Diego Portales

Santiago, Chile