Observing the Universe at millimetre wavelengths

Session

Friday A

30 juin 2023, 09:00

LPSC Grenoble

Présidents de session

Friday A

• Jack Sayers (Caltech)

Friday A

• Suzanne Madden (CEA Paris-Saclay)

60. Temperature measurements with the relativistic Sunyaev-Zel'dovich effect

Yvette Perrott (Victoria University of Wellington)

30/06/2023 09:00

At temperatures above ~5 keV, the non-relativistic approximation used to derive the classical thermal Sunyaev-Zel'dovich effect spectrum begins to fail. When relativistic effects are included, the spectrum becomes temperature-dependent. This leads to both a problem and an opportunity: a problem, because when the temperature dependence is not accounted for the Compton-y estimate is biased;...

8. Non-thermal pressure support in galaxy clusters: current constraints and perspective

Stefano Ettori (INAF-Osservatorio di Astrofisica e Scienza dello Spazio in Bologna)

30/06/2023 09:30

I will discuss how current (with XMM-Newton) and future X-ray observations (with XRISM and Athena) will be able to characterize the non-thermal pressure support in galaxy clusters, and how we can convert it in an estimate of the hydrostatic mass bias, also for a cosmological purpose.

95. Evolution of the Cooling Flow Problem in SPT-Selected Galaxy Clusters

Michael Calzadilla (MIT)

30/06/2023 09:50

For years we have grappled with the “cooling flow problem” in galaxy clusters, where the massive reserves of hot (${10}^7$ K) gas in the intracluster medium (ICM) have been universally observed to form stars with an efficiency of only 1-10%. Feedback from accreting active galactic nuclei (AGN) has been identified as the likely heating source capable of suppressing runaway cooling by up to two...

106. Illuminating the Physical Processes of Galaxy Evolution with the Cosmic Microwave Background

Nicholas Battaglia (Cornell University)

30/06/2023 10:10

A new window into the growth and evolution of large-scale structure
has opened up with the recent observations of the thermal and kinetic
Sunyaev-Zel’dovich (SZ) effects. I will review recent observations of
the SZ signals and highlight their expected rapid growth over the next
decade with upcoming cosmic microwave background experiments, like
Simons Observatory and CMB-S4. I will present...

32. Calibrating Star formation Rate and Constraining Dust SED with NIKA2 Observations

Golshan Ejlali (PhD student)

30/06/2023 11:10

Observing galaxies in millimeter continuum emission is vital to study the physical properties of the dusty interstellar medium as it provides constraints on the low-frequency end of the dust spectral energy distribution (SED). We present observations of NGC2146 (starburst spiral) and NGC2976 (peculiar dwarf) with the NIKA2 camera on the IRAM-30m telescope, as part of the IMEGIN guaranteed time...

36. Exploring the interstellar medium of nearby galaxies at millimeter wavelengths using the NIKA2 camera: the case of NGC 891

Stavroula Katsioli (National and Kapodistrian University of Athens, Department of Physics & National Observatory of Athens, IAASARS)

30/06/2023 11:35

High resolution observations of nearby galaxies at mm wavelengths allow us to study emission from interstellar medium in great detail. In the framework of the IMEGIN Large program, the NIKA2 camera on the IRAM 30-m telescope is used to map 22 nearby galaxies at 1.15 and 2 mm and at resolutions of 11.1" and 17.6", respectively. At these wavelengths we are able to trace the emission from very...