Publications related to On the dynamical evolution of Cepheids in star clusters & x22c6

Related publications (23)

Distinct origins of environmentally quenched galaxies in the core and outer virialised regions of massive clusters at 0.8 &lt; z &lt; 1.5

High-redshift (

z

∼ 1) galaxy clusters are the domain where environmental quenching mechanisms are expected to emerge as important factors in the evolution of the quiescent galaxy population. Uncovering these initially subtle effects requires exploring mu ...

Oxford University Press (OUP)2025

Evolution of the UV slope of galaxies at cosmic morning (z > 4): The properties of extremely blue galaxies

Michaela Hirschmann

We present an analysis of the UV continuum slope, β, using a sample of 726 galaxies with z > 4, selected from a mixture of JWST ERS, GTO, and GO observational programs. We considered only spectroscopic data obtained with the low-resolution (R ∼ 30−300) PRI ...

2025

Euclid preparation: LXX. Forecasting detection limits for intracluster light in the Euclid Wide Survey

Georges Meylan

The intracluster light (ICL) permeating galaxy clusters is a tracer of the cluster assembly history and potentially a tracer of their dark matter structure. In this work, we explore the capability of the Euclid Wide Survey to detect ICL using HE-band mock ...

EDP Sciences SA2025

Rubies: Jwst/nirspec Confirmation of an Infrared-luminous, Broad-line Little Red Dot with an Ionized Outflow

Michaela Hirschmann

The JWST discovery of "little red dots" (LRDs) is reshaping our picture of the early Universe, yet the physical mechanisms driving their compact size and UV-optical colors remain elusive. Here, we report an unusually bright LRD (zspec = 3.1) observed as pa ...

IOP Publishing Ltd2025

BEACON: JWST NIRCam Pure-parallel Imaging Survey. I. Survey Design and Initial Results

Yannick Michael Bahé

We introduce the Bias-free Extragalactic Analysis for Cosmic Origins with NIRCam (BEACON) survey, a JWST Cycle 2 program allocated up to 600 pure-parallel hours of observations. BEACON explores high-latitude areas of the sky with JWST/NIRCam over ∼100 inde ...

2025

Euclid: Early Release Observations – Unveiling the morphology of two Milky Way globular clusters out to their periphery

Frédéric Courbin, Georges Meylan

As part of the Euclid Early Release Observations (ERO) programme, we analysed deep, wide-field imaging from the VIS and NISP instruments of two Milky Way globular clusters (GCs), namely NGC 6254 (M10) and NGC 6397, to look for observational evidence of the ...

2025

Inferring the efficiency of convective-envelope overshooting in red giant branch stars

Saniya Khan

The understanding of mixing processes in stars is crucial to improving our knowledge of the chemical abundances in stellar photospheres and their variation with evolutionary phase. This is fundamental for many astrophysical issues on all scales, ranging fr ...

2025

The Cosmic Evolution Early Release Science Survey (CEERS)

Michaela Hirschmann

We present the Cosmic Evolution Early Release Science (CEERS) Survey, a 77.2 hr Director’s Discretionary Early Release Science Program. CEERS demonstrates, tests, and validates efficient extragalactic surveys using coordinated, overlapping parallel observa ...

2025

3d Cmz. III. Constraining the 3d Structure of the Central Molecular Zone Via Molecular Line Emission and Absorption

Robin Gopala Tress

The Milky Way's Central Molecular Zone (CMZ) is the largest concentration of dense molecular gas in the Galaxy, the structure of which is shaped by the complex interplay between Galactic-scale dynamics and extreme physical conditions. Understanding the 3D ...

IOP Publishing Ltd2025

The VELOCE modulation zoo II. Humps and splitting patterns in spectral lines of classical Cepheids

Richard Irving Anderson, Giordano Viviani, Henryka Ewa Netzel

Context. Line splitting in spectral lines is observed in various types of stars due to phenomena such as shocks, spectroscopic binaries, magnetic fields, spots, and nonradial modes. In pulsating stars, line splitting is often attributed to pulsation-induce ...

2025

Beyond MACS: physical properties of extremely X-ray luminous clusters at z > 0.5

Benjamin Emmanuel Nicolas Beauchesne

We present a sample of over 100 highly X-ray luminous galaxy clusters (L-X,L-0.1-2.4keV similar to 10(45 )erg s(-1)) at z similar to 0.5-0.9, discovered by the extended Massive Cluster Survey (eMACS) in ROSAT All-Sky Survey (RASS) data. Follow-up observati ...

OXFORD UNIV PRESS2025

Investigating the Impact of Supernova Feedback on Satellites in Elliptical Galaxies

Michaela Hirschmann

We investigate the influence of supernova (SN) feedback on the satellites of elliptical host galaxies using hydrodynamic simulations. Utilizing a modified version of the GADGET-3 code, we perform cosmological zoom-in simulations of 11 elliptical galaxies w ...

2025

Mass of Cepheid V350 Sgr Incorporating Interferometry and the Companion Mass

Richard Irving Anderson, Giordano Viviani

The system V350 Sgr has a classical Cepheid for the primary. Interferometry is presented for the system, and the full orbit is determined. The mass of the companion has been determined from an International Ultraviolet Explorer spectrum and comparison with ...

IOP Publishing Ltd2025

DESI 2024 III: baryon acoustic oscillations from galaxies and quasars

Jiaxi Yu, Daniel Felipe Forero Sanchez, Antoine Philippe Jacques Rocher, Rafaela Gsponer

We present the DESI 2024 galaxy and quasar baryon acoustic oscillations (BAO) measurements using over 5.7 million unique galaxy and quasar redshifts in the range 0.1 < z < 2.1. Divided by tracer type, we utilize 300,017 galaxies from the magnitude-limited ...

2025

Crimson Behemoth: A massive clumpy structure hosting a dusty AGN at z =4.91

Michaela Hirschmann

The current paradigm for the co-evolution of galaxies and their supermassive black holes postulates that dust-obscured active galactic nuclei (AGNs) represent a transitional phase towards a more luminous and unobscured state. However, our understanding of ...

OXFORD UNIV PRESS2024

Dwarf galaxies as a probe of a primordially magnetized Universe

Yves Revaz, Salim Bennouna, Mahsa Sanati

Aims. The true nature of primordial magnetic fields (PMFs) and their role in the formation of galaxies remains elusive. To shed light on these unknowns, we investigated their impact by varying two sets of properties: (i) accounting for the effect of PMFs o ...

2024

The phase-space distribution of the M 81 satellite system

Oliver Müller, Nick Heesters

The spatial distribution of dwarf galaxies around their host galaxies is a critical test for the standard model of cosmology because it probes the dynamics of dark matter halos and is independent of the internal baryonic processes of galaxies. Comoving pla ...

Edp Sciences S A2024

A case study of an early galaxy cluster with the Athena X-IFU

Yannick Michael Bahé

Context. Observations of the hot gas in distant clusters of galaxies, though challenging, are key to understanding the role of intense galaxy activity, supermassive black hole feedback, and chemical enrichment in the process of massive halo assembly.|Aims. ...

Edp Sciences S A2024

Weak gravitational lensing measurements of Abell 2744 using JWST and shear measurement algorithm pyRRG-JWST

David Richard Harvey

We update the publicly available weak lensing shear measurement algorithm pyRRG for the JWST, and apply it to UNCOVER DR1 imaging of galaxy cluster Abell 2744. At short wavelengths (

Oxford Univ Press2024

Advancements in Spectroscopic Surveys and Simulation Techniques in Physical Cosmology

Daniel Felipe Forero Sanchez

The discovery of the Cosmic Microwave Background marked a pivotal moment in Physical Cosmology, propelling the field into an era of unprecedented precision in describing the Universe. Over the past two decades, rapid advancements in spectroscopic surveys h ...

EPFL2024