scholarly journals Radial-Velocity Searches for Exoplanets in East Asia

2012 ◽  
Vol 8 (S293) ◽  
pp. 1-9
Author(s):  
Bun'ei Sato

AbstractHundreds of extrasolar planets have been discovered around various types of stars by various techniques during the past decade. Among them precise radial velocity measurements for stars are fundamental technique to detect and confirm exoplanets. In this paper activities in East-Asian region in this research field are introduced: East-Asian Planet Search Network, which is a network searching for planets around evolved intermediate-mass stars, and Subaru/IRD project, which will search for habitable planets around M-type dwarfs using infrared radial-velocity method.

2019 ◽  
Vol 491 (4) ◽  
pp. 5248-5257 ◽  
Author(s):  
Robert A Wittenmyer ◽  
R P Butler ◽  
Jonathan Horner ◽  
Jake Clark ◽  
C G Tinney ◽  
...  

ABSTRACT Our knowledge of the populations and occurrence rates of planets orbiting evolved intermediate-mass stars lags behind that for solar-type stars by at least a decade. Some radial velocity surveys have targeted these low-luminosity giant stars, providing some insights into the properties of their planetary systems. Here, we present the final data release of the Pan-Pacific Planet Search (PPPS), a 5 yr radial velocity survey using the 3.9 m Anglo-Australian Telescope. We present 1293 precise radial velocity measurements for 129 stars, and highlight 6 potential substellar-mass companions, which require additional observations to confirm. Correcting for the substantial incompleteness in the sample, we estimate the occurrence rate of giant planets orbiting low-luminosity giant stars to be approximately 7.8$^{+9.1}_{-3.3}$ per cent. This result is consistent with the frequency of such planets found to orbit main-sequence A-type stars, from which the PPPS stars have evolved.


2008 ◽  
Vol 7 (4) ◽  
pp. 641-673 ◽  
Author(s):  
CARSTEN FINK ◽  
MARTÍN MOLINUEVO

AbstractThe past seven years have seen a rapid proliferation of preferential trade agreements (PTAs) in the East Asian region. Many of the recently concluded PTAs are comprehensive in their coverage, seeking not only the dismantling of barriers to trade in goods but also the liberalization of trade in services. This paper offers an assessment of this recent wave of services agreements in East Asia, focusing on their liberalization content and their compliance with WTO rules on regional integration. It draws on a database in which the authors recorded the value added of PTA liberalization undertakings relative to pre-existing multilateral services commitments. Among other things, this database is used to empirically assess the effect of the scheduling approach on the depth and breadth of liberalization undertakings.


2020 ◽  
pp. 1-16
Author(s):  
LEIGH K. JENCO ◽  
JONATHAN CHAPPELL

Abstract This article argues for a ‘history from between’ as the best lens through which to understand the construction of historical knowledge between East Asia and Europe. ‘Between’ refers to the space framed by East Asia and Europe, but also to the global circulations of ideas in that space, and to the subjective feeling of embeddedness in larger-than-local contexts that being in such a space makes possible. Our contention is that the outcomes of such entanglements are not merely reactive forms of knowledge, of the kind implied by older studies of translation and reception in global intellectual history. Instead they are themselves ‘co-productions’: they are the shared and mutually interactive inputs to enduring modes of uses of the past, across both East Asian and European traditions. Taking seriously the possibility that interpretations of the past were not transferred, but rather were co-produced between East Asia and Europe, we reconstruct the braided histories of historical narratives that continue to shape constructions of identity throughout Eurasia.


2019 ◽  
Vol 41 (3) ◽  
pp. 16-19
Author(s):  
Yoshiyuki Kikuchi

Abstract East Asia occupies a substantial position in IUPAC today. The incumbent president for 2018-2019, Qi-Feng Zhou, is from China/Beijing, and three out of ten elected members of the Bureau are from East Asia: Mei-Hung Chiu from China/Taipei, Kew-Ho Lee from Korea, and Ken Sakai from Japan. This region is thus well-represented in the IUPAC leadership. However, this is not how this now global institution looked in the past. Its first president from East Asia was Saburo Nagakura (b. 1920) from Japan who assumed this office from 1981-1982, more than 60 years after the IUPAC was established in 1919. He was followed by Jung-Il Jing from Korea (2008-2009), Kazuyuki Tatsumi (2012-2013) from Japan, and Zhou. In terms of national adhering organizations (NAOs), Japan was the first East Asian nation admitted to IUPAC in 1921, but we had to wait until the late 1970s for all other national chemical communities in East Asia to be officially admitted to the IUPAC: The Chemical Society Located in Taipei in 1959, the Korean Chemical Society in 1963, and the Chinese Chemical Society in 1979. East Asia’s position in the IUPAC is the outcome of a rather long historical process.


2018 ◽  
Vol 4 (4) ◽  
pp. 598-611 ◽  
Author(s):  
Joseph MacKay

Abstract International relations (IR) has seen a proliferation of recent research on both international hierarchies as such and on historical IR in (often hierarchical) East Asia. This article takes stock of insights from East Asian hierarchies for the study of international hierarchy as such. I argue for and defend an explanatory approach emphasizing repertoires or toolkits of hierarchical super- and subordination. Historical hierarchies surrounding China took multiple dynastic forms. I emphasize two dimensions of variation. First, hierarchy-building occurs in dialogue between cores and peripheries. Variation in these relationships proliferated multiple arrangements for hierarchical influence and rule. Second, Sinocentric hierarchies varied widely over time, in ways that suggest learning. Successive Chinese dynasties both emulated the successes and avoided the pitfalls of the past, adapting their ideologies and strategies for rule to varying circumstances by recombining past political repertoires to build new ones. Taken together, these phenomena suggest new lines of inquiry for research on hierarchies in IR.


2008 ◽  
Vol 4 (S253) ◽  
pp. 346-349
Author(s):  
Cullen H. Blake ◽  
David Charbonneau ◽  
David W. Latham

AbstractOwing to their small masses and radii, Ultracool Dwarfs (UCDs; late-M, L, and T dwarfs) may be excellent targets for planet searches and may afford astronomers the opportunity to detect terrestrial planets in the habitable zone. The precise measurements necessary to detect extrasolar planets orbiting UCDs represent a major challenge. We describe two efforts to obtain precise measurements of UCDs in the Near Infrared (NIR). The first involves the robotic NIR observatory PAIRITEL and efforts to obtain photometric precision sufficient for the detection of terrestrial planets transiting UCDs. The second effort involves precise radial velocity measurements of UCDs in the NIR and a survey undertaken with the NIRSPEC spectrograph on Keck.


2012 ◽  
Vol 8 (S293) ◽  
pp. 33-35
Author(s):  
Chen Cao ◽  
Dayong Ren ◽  
Dongyang Gao ◽  
Jicheng Zhang ◽  
Nan Song ◽  
...  

AbstractBy using the 1-m reflecting telescope at Weihai Observatory of Shandong University, the transit observations of seven stars are carried out to accurately estimate the physical parameters of extrasolar planets. Besides, a new high-resolution spectrograph (WES) was installed on this telescope for radial velocity measurements on exoplanets, we will show some preliminary results.


Subject Crowdfunding in South-east Asia. Significance Regulatory reforms have made possible a range of alternative financing initiatives that raised almost 84 million dollars for small businesses in the past three years from South-east Asian platforms alone. Crowdfunding is the fastest-growing segment, though amounts are still small. Impacts Further industry-specific regulatory reforms will be required to support South-east Asian crowdfunding. Facing competition, more banks will be forced to offer online crowdfunding-related products. However, low product returns could be a disincentive to large investor interest in crowdfunding.


2012 ◽  
Vol 8 (S293) ◽  
pp. 445-447
Author(s):  
I. Boisse ◽  
F. Pepe ◽  
C. Perrier ◽  
D. Queloz ◽  
F. Bouchy ◽  
...  

AbstractWe present radial-velocity measurements (RV) obtained in one of the numbers of programs underway to search for extrasolar planets with the spectrograph SOPHIE at the 1.93-m telescope of the Observatoire de Haute-Provence. Targets were selected from catalogs observed with ELODIE, which had been mounted previously at the telescope, in order to detect long-period planets with an extended database close to 15 years.


2020 ◽  
Vol 21 (1) ◽  
pp. 1-24
Author(s):  
Timo Kivimäki

One of the main trends in the international relations and international security, for the past two decades, has been the new eagerness to intervene into failed and autocratic countries if they fail to protect their own citizens. This trend has distinguished East Asia (including both Southeast and Northeast Asia) from the West. Generally, the distinction has been based on three differences in strategic orientations. First, the role of the military is seen differently in East Asia and the West. Secondly, the role of states as instruments of the protection of civilians is seen differently in the West and East Asia. Thirdly, there is a difference between East Asia and the West regarding to the expected role of the UN Security Council in the authorization of protection. This article investigates the consequences of the three different strategies on human security by reviewing existing literature and by combining new data on discourses of protection with conflict data on various indicators of human survival and welfare. While the Western strategic concept of human security is dominant and hegemonic in the global debate, it seems, on the basis of this investigation, that the East Asian strategy of self-restraint, non-militarism and respect for sovereignty is more effective in the protection of civilians.


Sign in / Sign up

Export Citation Format

Share Document