Making Policies Work

Capano, Giliberto; Virani, Altaf; Howlett, Michael; Ramesh, M

doi:10.4337/9781788118194

Cited by 41 publications

(2 citation statements)

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“…Joint analyses allow a better understanding of the supranuclear-dense matter inside neutron stars (NSs) (e.g. Radice et al (2018); Radice & Dai (2019); Bauswein et al (2017); Margalit & Metzger (2017); Rezzolla et al (2018); Coughlin et al (2018b,a); Capano et al (2019)), a precise measurement of the speed of gravitational waves (Abbott et al 2017c), an independent measurement of the expansion rate of the Universe (Abbott et al 2017a;Hotokezaka et al 2019;Coughlin et al 2019a;Dhawan et al 2019), and constraints on alternative models of gravity (Ezquiaga & Zumalacrregui 2017;Baker et al 2017;Creminelli & Vernizzi 2017;Sakstein & Jain 2017).…”

Section: Introductionmentioning

confidence: 99%

Implications of the search for optical counterparts during the first six months of the Advanced LIGO’s and Advanced Virgo’s third observing run: possible limits on the ejecta mass and binary properties

Coughlin

Dietrich

Antier

et al. 2019

Monthly Notices of the Royal Astronomical Society

103

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GW170817 showed that neutron star mergers not only emit gravitational waves but also can release electromagnetic signatures in multiple wavelengths. Within the first half of the third observing run of the Advanced LIGO and Virgo detectors, there have been a number of gravitational wave candidates of compact binary systems for which at least one component is potentially a neutron star. In this article, we look at the candidates S190425z, S190426c, S190510g, S190901ap, and S190910h, predicted to have potentially a non-zero remnant mass, in more detail. All these triggers have been followed up with extensive campaigns by the astronomical community doing electromagnetic searches for their optical counterparts; however, according to the released classification, there is a high probability that some of these events might not be of extraterrestrial origin. Assuming that the triggers are caused by a compact binary coalescence and that the individual source locations have been covered during the EM follow-up campaigns, we employ three different kilonova models and apply them to derive possible constraints on the matter ejection consistent with the publicly available gravitational-wave trigger information and the lack of a kilonova detection. These upper bounds on the ejecta mass can be related to limits on the maximum mass of the binary neutron star candidate S190425z and to constraints on the mass-ratio, spin, and NS compactness for the potential black hole-neutron star candidate S190426c. Our results show that deeper electromagnetic observations for future gravitational wave events near the horizon limit of the advanced detectors are essential.

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Section: Introductionmentioning

confidence: 99%

Implications of the search for optical counterparts during the first six months of the Advanced LIGO’s and Advanced Virgo’s third observing run: possible limits on the ejecta mass and binary properties

Coughlin

Dietrich

Antier

et al. 2019

Monthly Notices of the Royal Astronomical Society

103

View full text Add to dashboard Cite

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“…(Ezquiaga & Zumalacarregui 2017;Baker et al 2017;Creminelli & Vernizzi 2017), and it placed new constraints on the equation of state of cold supranuclear matter, e.g. (Bauswein et al 2013;Abbott et al 2017a;Coughlin et al 2018b;Radice et al 2018;Radice & Dai 2019;Coughlin et al 2019b;Capano et al 2019). Latetime observations from X-rays to the radio bands monitored the afterglow (Margutti et al 2018;Troja et al 2018a;Lyman et al 2018;Ruan et al 2018;Resmi et al 2018;Fong et al 2019) before eventually showing that a successful jet was launched and that the early non-kilonova emission might be from a structured jet viewed 20 − 30 • from the jet axis Howell et al 2019a;Troja et al 2018b;Ghirlanda et al 2019).…”

mentioning

confidence: 99%

The first six months of the Advanced LIGO’s and Advanced Virgo’s third observing run with GRANDMA

Antier

Agayeva

Aivazyan

et al. 2019

Monthly Notices of the Royal Astronomical Society

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We present the Global Rapid Advanced Network Devoted to the Multi-messenger Addicts (GRANDMA). The network consists of 21 telescopes with both photometric and spectroscopic facilities. They are connected together thanks to a dedicated infrastructure. The network aims at coordinating the observations of large sky position estimates of transient events to enhance their follow-up and reduce the delay between the initial detection and the optical confirmation. The GRANDMA program mainly focuses on follow-up of gravitational-wave alerts to find and characterise the electromagnetic counterpart during the third observational campaign of the Advanced LIGO and Advanced Virgo detectors. But it allows for any follow-up of transient alerts involving neutrinos or gamma-ray bursts, even with poor spatial localisation. We present the different facilities, tools, and methods we developed for this network, and show its efficiency using observations of LIGO/Virgo S190425z, a binary neutron star merger candidate. We furthermore report on all GRANDMA follow-up observations performed during the first six months of the LIGO-Virgo observational campaign, and we derive constraints on the kilonova properties assuming that the events' locations were imaged by our telescopes.

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Public administration, context and innovation: A framework of analysis

Ongaro

Gong

Jing

2021

Public Admin & Development

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Innovation in public administration (PA) has played a pivotal role in building good governance and has attracted significant attention in the academia. The literature on PA innovation is burgeoning; however, this article argues that there is 'a missing link' in the extant literature in that the impacts of variation in context on PA innovation have not been sufficiently investigated. This article elaborates the analytical perspectives on the influences of various contexts over PA innovation and the mechanisms through which impacts may take place. Both theoretical and methodological complexities and challenges are apparent in disentangling contextual influences from other factors. The article proposes a research agenda for a context-orientated comparative analysis of PA innovation and offers a brief illustration regarding contextual differences between China and the European Union in existing studies. The article calls for further studies in this direction.

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Making Policies Work

Cited by 41 publications

References 0 publications

Implications of the search for optical counterparts during the first six months of the Advanced LIGO’s and Advanced Virgo’s third observing run: possible limits on the ejecta mass and binary properties

Implications of the search for optical counterparts during the first six months of the Advanced LIGO’s and Advanced Virgo’s third observing run: possible limits on the ejecta mass and binary properties

The first six months of the Advanced LIGO’s and Advanced Virgo’s third observing run with GRANDMA

Public administration, context and innovation: A framework of analysis

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