Observing the millimeter Universe with the NIKA2 camera

Session

Friday session

7 juin 2019, 09:00

42. NIKA2 mapping and cross-instrument SED extraction of extended sources with Scanamorphos

Helene Roussel (IAP)

07/06/2019 09:00

The steps taken to tailor to NIKA2 observations the Scanamorphos algorithm (initially developed to subtract low-frequency noise from Herschel on-the-fly observations) will be described, focussing on the consequences of the different instrument architecture and observation strategy. The method, making the most extensive use of the redundancy built in the multi-scan coverage with large arrays of...

52. Status of the NIKA2 Cosmology Legacy Survey (N2CLS)

Alexandre Beelen (Institut d'Astrophysique Spatiale / Laboratoire d'Astrophysique de Marseille)

07/06/2019 09:30

More than half of the photons emitted by stars across cosmic times have been absorbed by cosmic dust and re-emitted in the far-infrared and millimeter wavelength domain. Herschel and ALMA revealed that very massive and very dusty galaxies already exist in the early Universe (up to z~7). These objects are one of the keys to understand the formation of the most massive galaxies. However, these...

25. GOODS-ALMA: 1.1 mm extragalactic survey : Physical properties of massive star-forming galaxies at z > 2

M. Maximilien FRANCO (DAp CEA-Saclay)

07/06/2019 10:00

We will present the latest results of a 69 arcmin2 ALMA survey at 1.1mm, GOODS-ALMA, matching the deepest HST-WFC3 H-band observed region of the GOODS-South field. We have extracted two catalogs, one of galaxies purely selected by ALMA, from which we have identified sources both with and without HST counterparts, and another catalog based on priors. Our wide contiguous survey allows us to push...

11. Galactic star formation with NIKA2: the GASTON large programme

Dr Nicolas Peretto (Cardiff University)

07/06/2019 11:00

Over the last decade, Herschel observations of the Galactic interstellar medium have transformed our understanding of the early stages of star formation. At the low-mass end of the stellar initial mass function (IMF), a paradigm has emerged in which low-mass cores – the progenitors of stars with masses from ~0.1 to a couple of solar masses – are thought to form as the result of gravitational...

45. Searching for candidate pre-brown dwarf with NIKA2

Dr Bilal Ladjelate (IRAM Granada)

07/06/2019 11:30

From molecular clouds to young stellar objects, every step in the evolution of young stars can be observed in the millimetric range. As part of the NIKA2 (Adam et al. 2018) Large Program GASTON (PI: Nicolas Peretto), we observed at 1.2mm and 2mm the Ophiuchus Molecular Cloud. The dual band capabilities of NIKA2 allow us to understand the properties of dust in star-forming regions, and their...

29. Dust evolution from pre-stellar cores

Dr Charlène LEFEVRE (Institut de RadioAstronomie Millimétrique)

07/06/2019 12:00

Dust is the only tracer that is present from the edge of the interstellar cloud to the densest part, inside which stars and planets will form, named pre-stellar cores. It allows to trace the density structure of the cloud, of the core(s), and of the subsequent protoplanetary disk where it becomes a major actor of the planet formation. Dust grains evolve from bare simple elongated shape in the...