In this project we
are studying the properties of galaxies in voids with the use
of Integral Field Spectroscopy and ultradeep imaging from the
INT. Although this project is its early phase, some papers
have already been publish, like this Nature publication of
Dominguez et al. (2023).
6. WEAVE
Soon, WEAVE will be
available, an instrument that can observe 1000 objects at the
same. WEAVE will be very useful, for example to follow up
Euclid sources. I am involved in the WEAVE-CLUSTERS survey of
WEAVE, to obtain mini-IFU observations, to do similar science
as in SAMI-Fornax, but now for about 20 clusters.
The FDS survey, started in 2013, and finished in 2022, uses the telescopes at the European Southern Observatory and is performed by an international team consisting from researchers in various ESO member states and Chile. The survey is supported by observations using various other instruments and telescopes, amongst which VIRCAM on the VISTA telescope, and VIMOS and MUSE at the VLT.
The research in my group
concentrates on the dwarf galaxies in the Fornax cluster.
Aku Venhola, who finished his thesis in 2019 in Groningen
with a double degree with Oulu, did the full data reduction,
and defined the dwarf catalog (FDSDC, Venhola et al. 2018).
A second catalog was added later, including many very low
surface brightness galaxies (Venhola et al. 2022). Seyda Sen
(graduated in 2020) worked on detailed stellar
population modelling of the stellar populations in dwarf
galaxies in Fornax (see Sen et al. 2022). Elaheh Hamraz
(graduated in 2020) worked on young populations in dwarfs in
the Fornax and Virgo cluster Hamraz et al. 2019). Sara
Eftekhari was analyzing Integral Field Spectroscopy, to
study the internal kinematics of dwarfs, and their resolved
stellar populations. In the SUNDIAL project there are also
other people outside Groningen, who work on the FDSDC: Alan
Su (Oulu) was analyzing detailed morphology and nuclear
clusters (Su et al. 2021, 2022).. Shivangee Rathi (Gent) is
working on the stellar populations in the very outer parts,
from deep colour profiles. Michele Mastropietro has been
doing simulations on dwarf galaxies falling into the Fornax
Cluster, with a particular emphasis on NGC 1427A
(Mastropietro et al. 2021)
We are also using FDS in a
Citizen's Science project. Since it is difficult to find out
whether a galaxy in the FDS field is a dwarf galaxy in the
cluster, or a large, massive galaxy behind it, we have tried
developing algorithms to do this, but have also built a
programme on
Zooniverse, where members of the public can answer
this question. This programme is called Space
Fluff. Space Fluff has been set up by Anna Lanteri, as
a SUNDIAL internship student in Groningen, and analyzed by
bachelor student Christiaan Seerden.
You can find all
FDS-related papers
here.
The most important FDS papers are these:
Iodice
et al. 2016, Iodice
et al. 2017, Venhola et al. 2017, Venhola
et al. 2018, Iodice et al. 2019, Venhola
et al. 2019, Raj et al. 2019, Spavone
et al. 2020, Peletier
et al. 2020 (data release), Cantiello
et al. 2020, Raj et al. 2020, Su
et al. 2021, Su et al. 2022, Venhola et al. 2022.
A counterpart for the FDS in the
field and in groups is the VEGAS survey, led by my Italian
collaborators, in particular, Enrica Iodice.
3. The X-Shooter Spectral
Library (XSL) project
The X-Shooter
Spectral Library is a collection of 3000–25000 Å all
stellar spectra observed at a resolving power of R = λ/Δλ
~ 10 000 with the medium-resolution spectrograph X-shooter
at the Very Large
Telescope (VLT). The library enables a new
generation of stellar population models to study the
stellar populations in galaxies. The library is used to
make stellar population models for integrated stellar
populations. When making the library, we paid particular
attention to cool stars, to optimize the models in the
near-infrared.
I am a co-PI of
this project. The project is led by Scott Trager, and the
other co-PI is Ariane Lancon (Strasbourg). Involved,
amongst others, are the ex-Kapteyn postdoc Mariya
Lyubenova, Anais Gonneau, ex-Kapteyn postdoc and Matthijs
Dries, Kapteyn PhD student, as well as my ex-PhD student
Yanping Chen. Also collaborators Alexandre Vazdekis, Jesus
Falcon-Barroso, Paola Coelho, Philippe Prugniel and
Patricia Sanchez-Blazquez are involved. Most of the work
in the last 2 years was done by my PhD student Kristiina
Verro.
The project was
finished in 2022. We published the following papers. Three
data release papers:
2014: Chen et al. 'The X-shooter Spectral Library (XSL). I. DR1: Near-ultraviolet through optical spectra from the first year of the survey'
2020: Gonneau et al.: The X-shooter Spectral Library (XSL): Data Release 2
2022: Verro et
al.: The
X-shooter Spectral Library (XSL): Data Release 3.
And one paper
with the stellar population models:
2022: Verro et
al.: Modelling
Simple Stellar Populations from UV to NIR with the
X-shooter Stellar Library (XSL)
and 4 papers dealing with aspects of the library:
2016: Gonneau
et al.: Carbon
stars in the X-shooter Stellar Library
2017: Gonneau et al.: Carbon stars in the X-shooter Stellar Library. II: Comparison with Models
2019: Arentsen
et al.: Stellar
atmospheric parameters for 764 spectra from the
X-shooter Spectral Library
2021: Lancon et
al.: A
comparison between X-shooter spectra and PHOENIX models
across the HR-diagram
We also
published several conference proceedings.
4. The
KIWICS project and the WEAVE surveys
Deep INT
imaging data of nearby galaxy clusters, to obtain
photometric properties of their dwarf galaxies, to use
dwarf galaxies as probes to study the evolution of
galaxies in cluster. The PI's of KIWICS are Alfonso
Aguerri (IAC) and myself. We published 2 papers on Ultra
Diffuse Galaxies in KIWICS (Mancera Pina et al. (2018,
2019).
Choque-Challapa et al. 2021, Sen et al. 2023). This
work is done in preparation of the WEAVE
Cluster survey. In the WEAVE project I am co-leader (with
Alfonso Aguerri) of the nearby tear of the WEAVE Cluster
survey.
Former Members of my Research Group
Copyright © 2012 - All Rights Reserved - Domain Name
Template by OS Templates