J. -F. Macías-Pérez

Proof of concept of the COSMOCal project at the IRAM 30m telescope

S. Savorgnano, L. Bizzarri, A. Ritacco, J. Aumont et autres

This work reports on a test campaign conducted at the IRAM 30m telescope to validate the COSMOCal instrument, a novel concept for absolute calibration of polarization angle, beam properties, and instrumental efficiency. The development is motivated by the stringent calibration requirements of …

it, fr, Burundi (code pays fourni par la source)

Status of the COSmological Microwave Observations CALibrator

L. Mousset, J. Aumont, S. Berta, L. Bizzarri et autres

As the sensitivity of CMB telescopes increases, the need for precise calibration becomes critical. Started in 2022, the COSMOCal project aims to place an artificial polarized source in geostationary orbit, which will serve as a reference for CMB telescopes. This source will …

KISS: instrument description and performance

J. -F. Macías-Pérez, M Fernández-Torreiro, A. Catalano, Alessio Fasano et autres

Kinetic inductance detectors (KIDs) have been proven as reliable systems for astrophysical observations, especially in the millimetre range. Their compact size enables to optimally fill the focal plane, thus boosting sensitivity. The KISS (KIDs Interferometric Spectral Surveyor) instrument is a millimetre camera …

fr (code pays fourni par la source)

The XXL Survey LI. Pressure profile and $Y_{\rm SZ}$-$M$ scaling relation in three low-mass galaxy clusters at $z\sim1$ observed with NIKA2

R. Adam, M. Ricci, D. Eckert, Peter A. R. Ade et autres

The thermodynamical properties of the intracluster medium (ICM) are driven by scale-free gravitational collapse, but they also reflect the rich astrophysical processes at play in galaxy clusters. At low masses ($\sim 10^{14}$ M$_{\odot}$) and high redshift ($z \gtrsim 1$), these properties remain …

fr, ch, gb, es, it, se, us, gr, de, cl (code pays fourni par la source)

The stratification of ISM properties in the edge-on galaxy NGC 891 revealed by NIKA2

Stavroula Katsioli, Emmanuel M. Xilouris, Carsten Kramer, R. Adam et autres

As the millimeter wavelength range remains a largely unexplored spectral region for galaxies, the IMEGIN large program aims to map the millimeter continuum emission of 22 nearby galaxies at 1.15 and 2 mm. Using the high-resolution maps produced by the NIKA2 camera, …

CONCERTO: Readout and control electronics

O. Bourrion, C. Hoarau, J. Bounmy, D. Tourres et autres

The CONCERTO spectral-imaging instrument was installed at the Atacama Pathfinder EXperiment (APEX) 12-meter telescope in April 2021. It has been designed to look at radiation emitted by ionised carbon atoms, [CII], and use the "intensity Mapping" technique to set the first constraints …

Massive merging cluster PSZ2G091 as seen by the NIKA2 camera

E. Artis, R. Adam, Peter A. R. Ade, H. Ajeddig et autres

PSZ2 G091.83+26.11 is a galaxy cluster with M500 = 7.43 x 10^14 Msun at z = 0.822 1. This object exhibits a complex morphology with a clear bimodality observed in X-rays. However, it was detected and analysed in the Planck sample as …

fr, gb, it, es, us (code pays fourni par la source)

Probing the role of magnetic fields in star-forming filaments: NIKA2-Pol commissioning results toward OMC-1

H. Ajeddig, P. André, M. De Petris, E. F. C. Driessen et autres

Dust polarization observations are a powerful, practical tool to probe the geometry (and to some extent, the strength) of magnetic fields in star-forming regions. In particular, Planck polarization data have revealed the importance of magnetic fields on large scales in molecular clouds. …

PSZ2G091:A massive double cluster at z=0.822 observed by the NIKA2 camera

E. Artis, R. Adam, P. Ade, H. Ajeddig et autres

PSZ2 G091.83+26.11 is a massive galaxy cluster with M500 = 7.43 x 10^14 Msun at z = 0.822. This object exhibits a complex morphology with a clear bimodality observed in X-rays. However, it was detected and analysed in the Planck sample as …

Crab nebula at 260 GHz with the NIKA2 polarimeter. Implications for the polarization angle calibration of future CMB experiments

J. Aumont, E. F. C. Driessen, C. Kramer, J. -F. Macías-Pérez et autres

The quest for primordial gravitational waves enclosed in the Cosmic Microwave Background (CMB) polarization B-modes signal motivates the development of a new generation of high sensitive experiments (e.g. CMB-S4, LiteBIRD) that would allow them to detect its imprint.Neverthless, this will be only …

Galactic Star Formation with NIKA2 (GASTON): Evidence of mass accretion onto dense clumps

R. Adam, Peter A. R. Ade, H. Ajeddig, P. André et autres

High-mass stars ($m_* \gtrsim 8 \, M_\odot$) play a crucial role in the evolution of galaxies, and so it is imperative that we understand how they are formed. We have used the New IRAM KIDs Array 2 (NIKA2) camera on the Institut …

Mapping the intracluster medium temperature in the era of NIKA2 and MUSTANG-2

E. F. C. Driessen, Peter Eisenhardt, C. Kramer, J. -F. Macías-Pérez et autres

We present preliminary results from an on-going program that aims at mapping the intracluster medium (ICM) temperature of high redshift galaxy clusters from the MaDCoWS sample using a joint analysis of shallow X-ray data obtained by $Chandra$ and high angular resolution Sunyaev-Zel'dovich …