Publications and talks

Papers on massive stars, stellar rotation, and 3D spectral synthesis, plus collaborations in interferometry.

My research combines astronomical observations with computational modeling to investigate the physics of massive O- and B-type stars. These hot, luminous stars play an important role in the evolution of galaxies, but their extreme properties make them challenging to model. In particular, many of them rotate rapidly enough that centrifugal forces significantly distort their surfaces, producing strong variations in effective gravity, temperature, and emergent radiation across the stellar photosphere.

I develop three-dimensional models that account for these departures from spherical symmetry and connect the physical structure of a star directly to its observable signatures. By combining detailed spectral synthesis with interferometric modeling, I aim to understand how rotation, surface geometry, and temperature variations shape the spectra and spatially resolved observables of rapidly rotating stars.

The publications collected here reflect this work, spanning stellar atmosphere modeling, three-dimensional spectral synthesis, and the combined analysis of spectroscopic and interferometric observations. Together, they seek to bridge the gap between realistic stellar models and the observations used to test them.

Papers

Refereed articles and work in preparation, as first author and in collaboration.

1st author

3D-surface modeling of rotating stars. III. Combined spectroscopic and interferometric analysis using MCMC

D. Galán-Diéguez et al.
In preparation

2027
1st author

Photospheric analysis of the fast-rotating star ζ Ophiuchi using spectroscopy and interferometry

D. Galán-Diéguez et al.
In preparation

2027
1st author

3D-surface modeling of rotating stars. II. Implementation of differential rotation and radiation pressure in the PANORAMA framework

D. Galán-Diéguez et al.
In preparation

2027

The Galactic rotation curve from OB and Red Clump stars: kinematic tracers across stellar populations

S.R. Berlanas et al.
In preparation

2027
1st author

3D-surface modeling of rotating stars. I. The PANORAMA framework

D. Galán-Diéguez et al.
In preparation

Dec 2026

Photospheric parameters of the fast rotating star γ Cassiopeiae. Direct measurements with the MAGIC + CTAO LST-1 Stellar Intensity Interferometer

A. Cifuentes-Santos et al.
Under internal revision

2027
1st author

SPAMMS: 3D spectroscopic modeling of stellar surfaces. II. Implementation of Kurucz and TLUSTY model atmospheres

D. Galán-Diéguez et al.
A&A, in press

Sep 2026 arXiv ADS PRISMAS
1st author

The lack of fast rotators in Cyg OB2. I. Insights from spectral reclassification of its B0 population

D. Galán-Diéguez et al.
A&A 706, A59

Jan 2026 DOI ADS

Validation of up to seven TESS planet candidates through multi-colour transit photometry using MuSCAT2 data

A. Peláez-Torres et al.
A&A 690, A62

Oct 2024 DOI ADS

The discovery and follow-up of four transiting short-period sub-Neptunes orbiting M dwarfs

Y. Hori et al.
AJ 167, 289

Jun 2024 DOI ADS

Gliese 12 b: a temperate Earth-sized planet at 12 pc ideal for atmospheric transmission spectroscopy

M. Kuzuhara et al.
ApJL 967, L21

Jun 2024 DOI ADS

Simultaneous multicolour transit photometry of hot Jupiters HAT-P-19b, HAT-P-51b, HAT-P-55b, and HAT-P-65b

H. Kang et al.
MNRAS 528, 1930

Feb 2024 DOI ADS

The optical behaviour of BL Lacertae at its maximum brightness levels: a blend of geometry and energetics

C. M. Raiteri et al.
MNRAS 522, 102

Jun 2023 DOI ADS

TOI-1442 b and TOI-2445 b: two potentially rocky ultra-short period planets around M dwarfs

G. Morello et al.
A&A 673, A32

May 2023 DOI ADS

HD 20329b: an ultra-short-period planet around a solar-type star found by TESS

F. Murgas et al.
A&A 668, A158

Dec 2022 DOI ADS

A hot sub-Neptune in the desert and a temperate super-Earth around faint M dwarfs. Color validation of TOI-4479b and TOI-2081b

E. Esparza-Borges et al.
A&A 666, A10

Oct 2022 DOI ADS

Talks and posters

Conference contributions throughout my career.

Contributed talk

3D-surface modeling of rapidly rotating stars: spectral synthesis and interferometric synergy with PANORAMA and SPAMMS

Stellar Intensity Interferometry workshop | La Palma (Spain)

Oct 5–9, 2026
Contributed talk

Beyond spherical symmetry: 3D surface-based spectral synthesis with SPAMMS

XVII Reunión Científica de la SEA | Tarragona (Spain)

Jul 13–17, 2026
Invited workshop

From stellar distortion to planetary shadows: spectral modeling with SPAMMS

Centro de Astrobiología | Madrid (Spain)

Jan 14, 2026
Poster

Where are the fast rotators in Cygnus OB2? Investigating the missing high-velocity tail

IAU Symposium: Massive Stars Across Redshifts | Ensenada (Mexico)

Sep 15–19, 2025
Contributed talk

Decoding the lack of fast rotators in Cygnus OB2

I Congreso Galego de Investigación en Astronomía e Astrofísica | Vigo (Spain)

Jul 17–18, 2025
Contributed talk

Very first approach to the lack of fast rotators in Cygnus OB2

XVI Reunión Científica de la SEA | Granada (Spain)

Jul 15–19, 2024
Poster

Unraveling post-binary evolutionary channels in Cygnus OB2 using WEAVE

XVI Reunión Científica de la SEA | Granada (Spain)

Jul 15–19, 2024

Conferences and schools

Meetings and training schools I have attended.

Conference

ImBaSE2027: The Impact of Binaries on Stellar Evolution

Instituto de Astrofísica de Canarias | Tenerife (Spain)

Jul 12–16, 2027
School

XXXVII Canary Islands Winter School of Astrophysics

Instituto de Astrofísica de Canarias | Tenerife (Spain)

Nov 16–27, 2026
Conference

Stellar Intensity Interferometry workshop

CIEMAT | La Palma (Spain)

Oct 5–9, 2026
Conference

Bridging Gaps in High-Mass Star Research

MIAPbP | Munich (Germany)

Aug 17–28, 2026
Conference

XVII Reunión Científica de la SEA

Sociedad Española de Astronomía | Tarragona (Spain)

Jul 13–17, 2026
School

Writing in Astronomy

Instituto de Astrofísica de Canarias | Tenerife (Spain)

Jan 19–23, 2026
Conference

Massive Stars Across Redshifts in the Era of JWST and Large-Scale Surveys

International Astronomical Union | Ensenada (Mexico)

Sep 15–19, 2025
Conference

I Congreso Galego de Investigación en Astronomía e Astrofísica

Comunidade Galega de Investigación en Astronomía e Astrofísica | Vigo (Spain)

Jul 17–18, 2025
Conference

Munichfest2025: celebrating 40 years of research on hot luminous stars

Instituto de Astrofísica de Canarias | La Palma (Spain)

Apr 7–11, 2025
Conference

XVI Reunión Científica de la SEA

Sociedad Española de Astronomía | Granada (Spain)

Jul 15–19, 2024
School

Summer School in Statistics for Astronomers

Penn State University | Online

Jun 3–7, 2024
School

Stellar Spectroscopy Workshop

University of Tartu | Online

Sep 27–28, 2023
Conference

Two in a Million: the interplay of binaries and star clusters

European Southern Observatory | Garching (Germany)

Sep 11–15, 2023
School

ERASMUS+ School on Eclipsing Binaries and Asteroseismology

Instituto de Astrofísica de Canarias | La Palma (Spain)

Sep 26–30, 2022