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Sunak Vows ‘Radical’ Income Tax Cut as Truss Team Accuses Ex-Chancellor of ‘Another U-Turn’_我的网站

A |     中新网北京8月24日电 (记者 孙自法)宇宙中的小红点究竟是怎样的存在？北京时间8月24日夜间，施普林格·自然旗下专业学术期刊《自然-天文学》在线发表中国学者领衔完成的一篇研究论文认为，小红点可能位于总质量约为太阳10亿倍的小型致密宿主星系中。         　　这一重要天文发现，为宇宙大爆炸后最初十亿年间小红点等神秘天体的形成提供了新见解。                   本项研究关于早期宇宙中小红点的艺术概念图(图片来自研究团队)。施普林格·自然 供图          　　该论文介绍，宇宙小红点是近年来天文学界关注到的遥远的微小红色天体，其中心可能存在超大质量黑洞。不过，这些小红点的本质和它们光的来源尚不明确。    With a Tory leadership contest in full swing, former Chancellor Rishi Sunak has pledged to slash the basic rate of income tax by 20% by 2029 if he becomes UK prime minister, the largest such reduction in 30 years.,“What I’m putting to people today is a vision to deliver the biggest income tax cut since Margaret Thatcher’s government. It is a radical vision but also a realistic one, and there are some core principles that I’m simply not prepared to compromise on, whatever the prize,” Sunak emphasized.,Thatcher was Prime Minister of the UK from 1979 to 1990.,The ex­­-Chancellor also promised that if he prevails in the Tory leadership race, he will “never get taxes down in a way that just puts inflation up.” The 42-year-old added that he will “never make promises” he “can’t pay for” and he will “always be honest about the challenges” Britain faces.,Rishi Sunak Seeks to Crack Down on Foreign Lawbreakers, Increase Number of Deportations29 July, 09:11 GMT,“Because winning this leadership contest without levelling with people about what lies ahead would not only be dishonest – it would be an act of self-sabotage that condemns us to defeat at the next general election,” Sunak pointed out.,The Daily Mail cited an unnamed source from Foreign Secretary Liz Truss’s Tory leadership campaign as accusing Sunak of offering ‘jam tomorrow’.,“It’s welcome that Rishi has performed another U-turn on cutting tax, it’s only a shame he didn’t do this as chancellor when he repeatedly raised taxes. The public and Conservative Party members can see through these flip-flops,” the source argued.,This was echoed by Simon Clarke, chief secretary to the Treasury, who underscored that they “cannot afford to wait to help families, they need support now.” He made it clear that “Liz will cut taxes in seven weeks, not seven years.”,Sunak and Truss repeatedly locked horns over the tax issue during live TV debates last month, with the foreign secretary, in particular, accusing the former Chancellor of raising taxes “to the highest level in 70 years,” which is “not going to drive economic growth.”,Sunak claimed that the UK’s massive tax burden was the result of the unprecedented levels of government spending aimed at keeping the national economy afloat amid the coronavirus pandemic. Truss said that no other country was raising taxes, and accused Sunak of having no clear-cut plan for economic growth.,Meanwhile, voting ballots will start landing on doorsteps of Tory members starting Monday, with many of them expected to return the papers long before the September 2 deadline.,Sunak Unveils 10-Point Border Security Plan as Truss May Turn to Foreign Policy in Fight for PM Seat24 July, 06:12 GMT,Sunak and Truss are now two remaining candidates in the race to replace Boris Johnson as Conservative Party leader and prime minister. Both secured their places in the final two in July, when Trade Minister Penny Mordaunt was knocked out in the fifth round of voting by Conservative MPs.,The two contenders are set to spend the next few weeks campaigning for the votes of about 180,000 Conservative Party members around the country, who will vote by postal or online ballot. The winner of the party leadership race, who will be announced on September 5th, is due to automatically become UK prime minister.。过去的研究在紫外波段发现部分小红点周围存在微弱的延展成分，可能表明存在宿主星系的特征。不过，在光学波段(人眼可见光波段)还鲜有证据可以探测到这些结构成分，而光学波段能更明确地揭示恒星质量。

B |          　　在本项研究中，论文共同通讯作者、武汉大学教授丁旭恒和湖南师范大学特聘教授杨里岚与同事及国际合作者一起，结合詹姆斯·韦布空间望远镜217个小红点的图像，揭示出在单张影像中无法明确检测到的微弱光学发射(延伸至中心天体之外的光)。         　　研究团队通过数据建模表明，这些光学发射可能来自正在形成恒星的宿主星系，这些星系平均半径仅210秒差距(约685光年)，其紧凑程度约为宇宙历史中相近时期其他相似质量恒星形成星系的2.5倍。         　　研究团队认为，这些天文学研究发现表明，宇宙小红点并不是孤立的点光源，其周围很可能还存在一个紧凑的宿主星系，这为揭示小红点究竟是什么、又是如何形成的提供了重要线索。         　　他们也提醒说，本项研究揭示的是小红点这一群体的平均特征。由于其宿主星系发出的光十分微弱，目前在大多数单个小红点中还难以直接探测到。因此，后续研究需要利用更多波段、更深的观测以及更大的样本进一步验证这一发现，并结合光谱信息了解这些宿主星系的性质，进而探索早期宇宙中星系与中心黑洞的共同演化关系。(完)                【编辑:万纪玮】。

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