IAU376 17-21 April 2023 | Programme

IAU Symposium 376 | 17-21 April 2023

At the cross-roads of astrophysics and cosmology: Period–luminosity relations in the 2020s

An event sponsored by IAU | hybrid conference in Budapest, Hungary


Download preliminary program in pdf format

Welcome reception

Sunday, 16 April

Sunday, 16 April 2023

15:00–19:00 Registration
Welcome cocktail Hotel Danubius Helia – conference venue

Monday, 17 April 2023

09:00–12:20 Chair: Róbert Szabó
09:00–09:30 Opening ceremony Addresses by the SOC and LOC
09:30–10:00 R Wendy Freedman (remote) The Extragalactic Cepheid Distance Scale
Session I: Setting the Scene – The Extragalactic ‘Problem’
10:00–10:30 R Adam Riess Local Value of the Hubble Constant from SH0ES
10:30–11:00 Coffee/tea break
11:00–11:30 I Rachael Beaton H0 at its Foundation: The Limitations of Anchors of the Distance Scale
11:30–11:50 C Louise Breuval The Cepheid Distance Scale and its Metallicity Dependence
11:50–12:20 I Myung Gyoon Lee The Tip of the Red Giant Branch as a Cosmological Probe
12:20–13:30 Lunch
13:30–15:30 Chair: Richard de Grijs
13:30–13:50 C Gergely Dálya Tackling the Hubble Tension with Gravitational Waves
13:50–14:10 C Richard I. Anderson A 1% Calibration of Long-period Variable Stars for the Extragalactic Distance Scale
14:10–14:30 C Pierre Kervella Inspecting the Ladder: the Cepheid Distance to the SN Ia Host Galaxy NGC 5584
14:30–15:00 R Igor Soszyński Period–Luminosity Relations in the Local Group of Galaxies
15:00–15:30 P Poster sparkler pitches [schedule TBD; chaired by session chair]
15:30–16:00 Coffee/tea break
16:00–18:00 Chair: László Kiss
Session II: Stellar Pulsation Physics
16:00–16:20 C Arief Ahmad Self-excited Pulsations in Global 3D Simulations of Cool, Luminous and Evolved Stars
16:20–16:40 C Giulia De Somma New Theoretical Period–Luminosity–Colour and Period–Wesenheit Relations for Anomalous Cepheids
16:40–17:00 C Richard de Grijs New Double Mode Cepheids from the Zwicky Transient Facility Survey
17:00–17:20 C Saniya Khan Investigating Gaia (E)DR3 Parallax Systematics Using Asteroseismology of Cool Giant Stars Observed by Kepler, K2, and TESS
17:20–17:40 C Gergely Hajdu Circumstellar Matter Around RR Lyrae Variables
17:40–18:00 C Ernst Paunzen (remote) Pulsation of Chemically Peculiar Stars

Tuesday, 18 April 2023

09:00–10:30 Chair: Nancy Evans
09:00–09:20 C Mami Deka A Study of Stellar Photosphere – Hydrogen Ionization Front Interaction in δ Scuti Stars
09:20–09:40 C Susmita Das A Multiwavelength Analysis of BL Her Stars: Models versus Observations
09:40–10:00 C Géza Csörnyei How ‘Accurate’ is ‘Precise’? The Effect of Period Fluctuations on PL Relations
Session III: Primary Period–Luminosity Relation Calibrators in the Milky Way
10:00–10:30 R Gisella Clementini Impact of the ESA Gaia Mission on the Primary Period – Luminosity Relation Calibrators in the Milky Way: Cepheids and RR Lyrae
10:30–11:00 Coffee/tea break
11:00–12:30 Chair: Tatiana Muraveva
11:00–11:30 R Martin Groenewegen Primary Period–Luminosity Relation Calibrators in the Milky Way: Cepheids and RR Lyrae – Physical basis, Calibration, and Applications
11:30–11:50 C Bogumił Pilecki Cepheids with Giant Companions – A New Abundant Source of Cepheid Astrophysics
11:50–12:10 C Mauricio Cruz Reyes A Calibration of the Galactic Cepheid Luminosity Scale based on Gaia DR3 Open Cluster Astrometry
12:10–12:30 C Erasmo Trentin Cepheid Metallicity in the Leavitt Law (C-MetaLL) Survey. The Metallicity Dependence of Cepheid Period–Luminosity Relations
12:30–13:40 Lunch
13:40–15:30 Chair: Caroline Huang
13:40–14:10 I Tatiana Muraveva RR Lyrae Stars as Distance Indicators in the Gaia Era
14:10–14:30 C Laurent Eyer Exploring the Complexities of Determining Mean Luminosity in Variable Stars: The Impact of Biased Means in Weighted Procedures
14:30–14:50 C Giuliana Fiorentino RRLs to Trace Early Galaxy Formation
14:50–15:10 C Bartłomiej Zgirski Near-Infrared Period–Luminosity Relations for Galactic RR Lyrae based on Photometry from OCA and Gaia DR3 Parallaxes
15:10–15:30 C Ilaria Musella The Cepheid Based Cosmic Distance Scale: New Constraints from Updated Synthetic Multi-filter Cepheid PL Relations
15:30–16:00 Coffee/tea break
16:00–18:00 Chair: Martin Groenewegen
16:00–16:30 I Abdelmajid Benhida Photometric and Spectroscopic Measurement Campaign on the RR Lyr (RR Lyrae) and R Scuti (RV Tauri), at the Oukaimeden Observatory in Morocco
16:30–16:50 C Weronika Narloch Period–Luminosity Relations for Galactic Classical Cepheids in the Sloan bands
16:50–17:10 C Vincenzo Ripepi On the Origin of Galactic Anomalous Cepheids
17:10–18:00 Panel discussion Chair: László Kiss - New stellar observations and tools

Wednesday, 19 April 2023

09:00–12:30Chair: Gisella Clementini
Session IV: Disentangling the Structural Components of the Milky Way
09:00–09:30 R Vasiliy Belokurov (remote) Milky Way components with RR Lyrae
09:30–10:00 I Akiharu Nakagawa Stars and their Astronomical Applications
10:00–10:30 I Dorota Skowron The Structure of the Milky Way from Period–Luminosity Relations
10:30–11:00 Coffee/tea break
11:00–11:20 C Fran Jiménez-Esteban Variability Properties of the Gaia DR3 Catalogue of Galactic AGB stars
11:20–11:40 C Yi Ren (remote) Granulation in Red Supergiants: The Scaling Relations
11:40–12:20 P Poster sparkler pitches [schedule TBD; chaired by session chair]
12:20–13:40 Lunch

Thursday, 20 April 2023

09:00–10:40 Chair: Vincenzo Ripepi
09:00–09:20 C Matteo Monelli Towards Homogeneous Distances in the Local Group
09:20–09:40 C Teresa Sicignano The Distance Scales of Anomalous and Type 2 Cepheids from Near Infrared Observations in the Magellanic Clouds
09:40–10:00 C Mónica Taormina Early-type Eclipsing Binaries as Distance Indicators
10:00–10:20 C Alexandre Gallenne Sub-percent Binary Star Masses and Distances from Interferometric Observations
10:20–10:40 C Maria Tantalo On the Use of the Mean J-band Magnitude of Carbon Stars as a Distance Indicator
10:40–11:10 Coffee/tea break
11:10–12:20 Chair: Dorota Skowron
11:10–11:40 I Armando Arellano Ferro (remote) RR Lyrae Light Curves and their Role in the Globular Cluster Metallicity and Distance Determination
11:40–12:00 C Javier Minniti Using Classical Cepheids to Study the Far Side of the Milky Way Disk
12:00–12:20 C Antonio Garcia Hernandez The PL Diagram for dSct: Back in Business as Distance Estimators
12:20–13:30 GROUP PHOTO
13:30–15:30 Chair: Biwei Jiang
13:30–14:00 R Marcella Marconi (remote) Theoretical Stellar Pulsation Physics
Session V: Period–Luminosity Relations in the Nearby Universe
14:00–14:30 I Anupam Bhardwaj Period–Luminosity–Metallicity Relations for Classical Pulsators at Near-Infrared Wavelengths
14:30–14:50 C Zoi Spetisieri First Direct Measurement of the Stellar Association Bias in the SN Host Galaxy M101
14:50–15:10 C Kayla Owens An Independent Analysis of the Multi-Wavelength Cepheid PL Relations in NGC 7250
15:10–15:30 C Kerdaris Kurbah A Multi-phase Study of Theoretical and Observed Light Curves of Classical Cepheids in the Magellanic Clouds
15:30–16:00 Coffee/tea break
16:00–18:00 Chair: Rachael Beaton
16:00–16:20 C Vincent Hocdé Metallicity Estimations of MW, SMC, and LMC Classical Cepheids from the Shape of the V- and I-band Light Curves
16:20–16:40 C Shu Wang Double-Mode RR Lyrae Stars – A Robust Distance and Metallicity Indicator
16:40–17:00 C Felipe Espinoza-Arancibia Empirical Constraints for the Instability Strip from the Analysis of LMC Cepheids
17:00–18:00 Panel discussion Chair: Patricia Whitelock: The Role of Machine Learning and its Applications

Friday, 21 April 2023

09:00–10:40 Chair: Patricia Whitelock
Session VI: Non-Traditional Period–Luminosity Relations
09:00–09:30 I Biwei Jiang The Period–Luminosity Relation of Red Supergiants
09:30–10:00 I Michał Pawlak (remote) Period–Luminosity Relations Formed by Contact and Close Binary Systems
10:00–10:20 C Patryk Iwanek (remote) Comprehensive Analysis of Mira-type Stars Variability and the Structure of the Milky Way
10:20–10:40 C Miora Andriantsaralaza Distance Estimates for AGB Stars – Gaia DR3 Parallax and PL Relation
10:40–11:10 Coffee break
11:10–12:40 Chair: Anupam Bhardwaj
11:10–11:30 C Clara Martinez-Vazquez Breaking the Law: A Segmented Period - Luminosity Relation in delta Scuti Stars
11:30–12:00 I Michele Trabucchi (remote) Long-Period Variables as Distance and Age Indicators in the Era of Gaia and LSST
12:00–12:20 C Caroline Huang The Mira Distance to M101
12:20–12:40 C Piotr Wielgórski Near-Infrared Period–Luminosity Relations for Type II and Anomalous Cepheids in the Solar Neighbourhood
12:40–14:00 Lunch
14:00–15:30 Chair: Shu Wang
14:00–14:30 I Xiaodian Chen Possible Studies on Variable Stars based on CSST
14:30–14:50 C Dieter Engels OH/IR Stars and the Period–Luminosity–Relation of Mira Variables
14:50–15:10 C Fangzhou Ren An Uncharted but Valuable Distance Indicator: Period–Luminosity Relation of W UrsaeMajoris-type Contact Binaries
15:10–15:30 C Megan Lewis Galactic Center Miras: Period–luminosity Relations and Circumstellar Effects
15:30– Summary and closing ceremony

Poster Session 1: Monday 17 April 2023, 15:00–15:30

No.Presenting author
Poster title
P1Christine Clement
Helen Sawyer Hogg and the Globular Cluster Period–Luminosity Relation
P2Zsófia Bora
Distance Measurements of Type Ia Supernovae from Light Curve Fitting
P3Anton Afanasiev
Decreasing the scatter of SN Ia host Cepheid PL relations
P4Chul Chung
Population Age Origin of the Host Mass Step in Type Ia Supernovae
P5Seunghyun Park
Evidence for strong progenitor age bias in type Ia supernova distance scale: Lessons from Cepheids
P7Steve Ardern
First Detection of CO Emission from Cepheid Variables: a Step to Reducing the H0 Error Budget
P8John Baruch
A proposal for the absorption of light by dark matter to explain the Hubble Tension
P9John Baruch
Is the Period–Luminosity Relation for Cepheids upset by a small threshold for the absorption of light by Dark Matter?
P10Géza Csörnyei
Cepheids in M51: cross-checking the PLR distance with independent estimates
P11Maria Tantalo
Variable stars in NGC 6822
P12Mahtab Gholami
Variable Stars in an Irregular Dwarf Galaxy, IC10
P13Hedieh Abdollahi
Detection of Long-Period Variable Stars in And IX to Study Star Formation History and Dust Production Rate
P15Jesper Storm
The effect of metallicity on the PL relation from a Baade–Wesselink type analysis of a Cepheids in the Milky Way and the Magellanic Clouds
P16Tahere Parto
The Star Formation History and Chemical Enrichment of Sagittarius Dwarf Irregular Galaxy Derived from Long-period Variable Stars
P18Gustavo Medina Toledo
RR Lyrae Stars as Standard Candles and Tools to Disentangle the Milky Way’s History
P19Bastian Lengen
On the Consistency of the Cepheid and TRGB Distance Scales
P20Zehao Zhang
Dependence of Pulsation Mode of Cepheids on Metallicity
P21Henryka Netzel
Non-Radial Modes in Classical Pulsators — Perspectives for Asteroseismology
P22Emese Plachy
Classifying Milky Way Cepheids with TESS
P23Dóra Tarczay-Nehéz
Testing Ultra-low Amplitude Cepheid Candidates in the Galactic Disk by TESS and Gaia
p24Gábor Kovács
Thousand faces of convection
P25Pradip Karmakar
Types of Period Changes of Type II Cepheids

Poster Session 2: Wednesday 19 April 2023, 12:00–12:30

No.Presenting author
Poster title
P26József M. Benkő
How Accurate are those Periods?
P27Giordano Viviani
VELOcities of Cepheids (VELOCE) DR1: An Unprecedented View of Cepheid RV Variability and Spectroscopic Binarity
P28Young-Beom Jeon
Review of BOAO Short Period Variable Star Surveys to Calibrate Period–Luminosity Relations
P29Giovanni Catanzaro
Metallicity determination from IGRINS spectra for a sample of Galactic Cepheids
P30Nancy Evans
The Mass of the Cepheid S Mus
P31Javier Minniti
Spectral Energy Distribution Fitting to Find and Characterize Cepheids in Binary Systems
P32Garance Bras
Observational Calibration of the Projection Factor of RR Lyrae Stars Using the SPIPS Pulsation Modeling
P33Manuel Sánchez-Benavente
Multiband Photometry and Spectroscopy of RR Lyrae Field Stars
P34Vázsony Varga
Improving the Gaia RR Lyrae Photometric Metallicities
P35Cecilia Mateu
Calibrating RR Lyrae Absolute Magnitudes as a Function of Period Shift to Correct Post-ZAHB Evolution Systematics
P36Olivera Latković
WUMaCat — The Largest Catalog of Individually Studied W UMa Stars
P38Eric Hintz
IR Spectroscopy of stars in various instability strips
P39Adrienn Forró
Validation of the RR Lyrae Identifications in the PanSTARRS PS1 3π Survey with K2 and Gaia
P40Csilla Kalup
Combined Gaia and K2 Studies of Globular Cluster Variables
P41Ernst Paunzen
Catalogue of Variable Stars in Open Cluster Fields
P42Monika I. Jurkovic
The Classification Intricacy of Different Types of Cepheid Variable Stars and the Case of RU Camelopardalis
P43Mahdi Abdollahi
Hierarchical Classification of Variable Stars Using Deep Convolutional Neural Networks
P45Marcella Di Criscienzo
Light Curve Recovery with the Rubin Observatory’s LSST
P46Vittorio Francesco Braga
Light curve templates of RR Lyrae in the LSST photometric system
P47Jae Woo Lee
The Post-Mass Transfer Eclipsing Binary WASP 1814+48: Absolute Properties and Multiperiodic Pulsations
P48Justyna Olszewska
Spectroscopic Analysis of the Variable Star CO Aurigae with the GATS Telescope
P49Tahereh Ramezani
Non-Variable Stars

IAU Symposium 376