ORCID Profile
0000-0002-7326-5793
Current Organisation
European Southern Observatory
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Publisher: Oxford University Press (OUP)
Date: 15-03-2017
DOI: 10.1093/MNRAS/STX640
Publisher: Oxford University Press (OUP)
Date: 08-12-2017
Publisher: Oxford University Press (OUP)
Date: 22-05-2021
Abstract: Radio-emitting jets might be one of the main ingredients shaping the evolution of massive galaxies in the Universe since early cosmic times. However, identifying early radio active galactic nuclei (AGNs) and confirming this scenario have been hard to accomplish, with studies of s les of radio AGN hosts at z & 2 becoming routinely possible only recently. With the above in mind, we have carried out a survey with the Atacama Compact Array (ACA or Morita Array) at 1.3 mm (rms = 0.15 mJy) of 36 high-redshift radio AGN candidates found within 3.9 deg2 in the ELAIS-S1 field. The work presented here describes the survey and showcases a preliminary set of results. The selection of the s le was based on three criteria making use of infrared (IR) and radio fluxes only. The criterion providing the highest selection rate of high-redshift sources (86 per cent at z & 0.8) is one combining an IR colour cut and radio flux cut (S5.8μm/S3.6μm & 1.3 and $S_{\\rm 1.4\\, GHz}\\gt 1\\,$ mJy). Among the s le of 36 sources, 16 show a millimetre (mm) detection. In eight of these cases, the emission has a non-thermal origin. A zsp = 1.58 object, with a mm detection of non-thermal origin, shows a clear spatial offset between the jet-dominated mm continuum emission and that of the host’s molecular gas, as traced by serendipitously detected CO(5-4) emission. Among the objects with serendipitous line detections there is a source with a narrow jet-like region, as revealed by CS(6-5) emission stretching 20 kpc out of the host galaxy.
Publisher: Emerald
Date: 04-11-2019
DOI: 10.1108/EEMCS-05-2019-0107
Abstract: The learning outcomes are as follows: understanding online, traditional and omnichannel retail and the challenges and benefits of each method evaluating the effect of consumer buying behaviour on a company’s growth strategy assessing the effect of changing industry dynamics and technology on consumer behaviour and understanding the role of consistent customer experience across different retail mediums. This case looks at Yuppiechef, a successful e-commerce business, and their move from “clicks to bricks” with the introduction of retail stores. Founder and CEO of Yuppiechef, Andrew Smith, shares the current business status and considers how to maintain the brand’s culture with the growth of retail and being an omnichannel pioneer. The primary target audience for this teaching case is postgraduate business students, especially students of digital marketing, strategy and e-commerce. This teaching case is intended to be used as case study in postgraduate business programmes such as Master of Business Administration (MBA), a specialist masters’ programme such as MM (Entrepreneurship), post-graduate diploma in management (PGDip), as well as selected executive education programmes. Teaching Notes are available for educators only. CSS 8: Marketing.
Publisher: Cambridge University Press (CUP)
Date: 05-2018
DOI: 10.1017/S1743921318003897
Abstract: We present deep low radio frequency (230-470 MHz) observations from the Karl G. Jansky Very Large Array of the Perseus cluster, probing the non-thermal emission from the old particle population of the AGN outflows. Our observations of this nearby relaxed cool core cluster have revealed a multitude of new structures associated with the mini-halo, extending to hundreds of kpc in size. Its irregular morphology seems to have been influenced both by the AGN activity and by the sloshing motion of the cluster’ gas. In addition, it has a filamentary structure similar to that seen in radio relics found in merging clusters. These results illustrate the high-quality images that can be obtained with the new JVLA at low radio-frequencies.
Publisher: American Astronomical Society
Date: 03-08-2020
Publisher: Oxford University Press (OUP)
Date: 17-05-2019
Abstract: We present deep, multiwavelength radio observations of SpARCS104922.6 + 564032.5, a z = 1.71 galaxy cluster with a starbursting core. Observations were made with the Karl G. Jansky Very Large Array (JVLA) in three bands: 1–2 GHz, 4–8 GHz, and 8–12 GHz. We detect a radio source coincident with the brightest cluster galaxy (BCG) that has a spectral index of α = 0.44 ± 0.29 and is indicative of emission from an active galactic nucleus. The radio luminosity is consistent with the average luminosity of the lower redshift BCG s le, but the flux densities are 6σ below the predicted values of the star-forming spectral energy distribution based on far infrared data. Our new fit fails to simultaneously describe the far infrared and radio fluxes. This, coupled with the fact that no other bright source is detected in the vicinity of the BCG implies that the star formation region, traced by the infrared emission, is extended or clumpy and not located directly within the BCG. Thus, we suggest that the star-forming core might not be driven by a single major wet merger, but rather by several smaller galaxies stripped of their gas or by a displaced cooling flow, although more data are needed to confirm any of those scenarios.
Publisher: Oxford University Press (OUP)
Date: 12-06-2017
No related grants have been discovered for Marie-Lou Gendron-Marsolais.