中国团队新发现多例具有快速光变的罕见变星|无码人妻一区二区三区在线视频

  中新社合肥7月18日电 (记者 吴兰)记者18日从中国科学技术大学获悉,该校天文学系变星研究团队利用墨子巡天望远镜(WFST),对银道面开展了分钟级高频采样观测,新发现多例具有快速光变的罕见变星。相关研究成果近日发表于国际知名天文学期刊《天体物理学报增刊》。

  作为北半球极具竞争力的光学时域巡天望远镜,中国新建的墨子巡天望远镜配备6.5平方度大视场和7.65亿像素相机,能够以分钟级间隔对银河系目标进行连续监测。

  在望远镜试运行和先导观测阶段,WFST对约20平方度天区累计进行了13小时的高频观测,成功获取了超50万条高采样率的光变曲线。

  科研人员通过自主研发的光变分析算法,从这些数据中新发现了多例稀有的周期性变星,包括迄今观测到的最暗的ZZ Cet型脉动白矮星之一J0530+5945以及物理起源尚待研究的热白矮星变星J0446+7227。

  与此同时,该研究也展现了墨子巡天望远镜卓越的恒星耀发探测能力。在13小时的观测时间内,望远镜共探测到33颗耀星。这些耀星的样本普遍比当前主流巡天望远镜发现的耀星更暗弱。

  墨子巡天望远镜还成功捕捉到一颗极暗弱(约22等)恒星(J0427+7034)上仅持续数分钟的耀发事件,此类来自暗弱恒星系统的快速耀发事件因对观测能力要求极高,此前极少被系统记录。(完)

**HIVdechuanboyuyufang:jiaoyuyuyishidezhongyaoxing**aizibingdu(HIV)shiyizhongyingxiangquanqiushubaiwanrendebingdu,suiranyixuejishudejinbushideganranzhedeshenghuozhiliangdeyixianzhugaishan,danshehuiduiHIVderenzhihelijierengrancunzaizhuduowuqu。yinci,zhenduiHIVdechuanboyuyufang,jiaqiangjiaoyuyuyishidetigaoxiandeyouweizhongyao。shouxian,HIVdechuanbotujingxuyaodedaogengguangfanderenshi。renmenchangchangduiHIVchuanbodexinxilejiebuzu,yizhiyuzaishenghuozhongchanshengkongjuhepianjian。HIVzhuyaotongguoxueye、jingye、yindaofenmiwuhemuruchuanbo,danbingbushitongguorichangjiechu、kongqi、gongyongshiwuhuoshuidengfangshichuanbo。yinci,gongzhongyinggaixuexibingchuanbokexuezhishi,xiaochuduiganranzhedeqishiyukongju,chuangzaoyigegengjiabaoronghelijiedehuanjing。qici,yufangcuoshidejiaoyutongyangbukehushi。shiyonganquantao、jinxingdingqijiancehecaiqubaoluqianyufang(PrEP)dengcuoshi,keyixianzhujiangdiHIVdechuanbofengxian。raner,zaiyixiediqu,youyuquefajiaoyuziyuanhexuanchuan,xuduorenduizhexieyufangcuoshibingbulejie。ciwai,qingshaonianhegaofengxianquntiwangwangshiyufangjiaoyudezhongdianduixiang,tongguoxiaoyuanhuodongheshequxuanchuan,keyiyouxiaotigaotamendeziwobaohuyishi。zuihou,zhengfuhefeizhengfuzuzhizaituidongHIVfangzhifangmianyebanyanzhezhongyaojiaose。xujiadaduiHIVfangzhixiangmudetouzi,baozhangyiliaoziyuandegongpingfenpei,youqishizaiziyuankuifadediqu。tongshi,yunchanfudeHIVjiancehezhiliaoyeyingchengweizhongdian,quebaomuyingchuanbodefengxianjiangdaozuidi。zongshangsuoshu,jiaqiangduiHIVchuanbotujingheyufangcuoshidejiaoyuyu*(*)*(*)H(H)I(I)V(V)的(de)传(chuan)播(bo)与(yu)预(yu)防(fang):(:)教(jiao)育(yu)与(yu)意(yi)识(shi)的(de)重(zhong)要(yao)性(xing)*(*)*(*)艾(ai)滋(zi)病(bing)毒(du)((()H(H)I(I)V(V))())是(shi)一(yi)种(zhong)影(ying)响(xiang)全(quan)球(qiu)数(shu)百(bai)万(wan)人(ren)的(de)病(bing)毒(du),(,)虽(sui)然(ran)医(yi)学(xue)技(ji)术(shu)的(de)进(jin)步(bu)使(shi)得(de)感(gan)染(ran)者(zhe)的(de)生(sheng)活(huo)质(zhi)量(liang)得(de)以(yi)显(xian)著(zhu)改(gai)善(shan),(,)但(dan)社(she)会(hui)对(dui)H(H)I(I)V(V)的(de)认(ren)知(zhi)和(he)理(li)解(jie)仍(reng)然(ran)存(cun)在(zai)诸(zhu)多(duo)误(wu)区(qu)。(。)因(yin)此(ci),(,)针(zhen)对(dui)H(H)I(I)V(V)的(de)传(chuan)播(bo)与(yu)预(yu)防(fang),(,)加(jia)强(qiang)教(jiao)育(yu)与(yu)意(yi)识(shi)的(de)提(ti)高(gao)显(xian)得(de)尤(you)为(wei)重(zhong)要(yao)。(。)首(shou)先(xian),(,)H(H)I(I)V(V)的(de)传(chuan)播(bo)途(tu)径(jing)需(xu)要(yao)得(de)到(dao)更(geng)广(guang)泛(fan)的(de)认(ren)识(shi)。(。)人(ren)们(men)常(chang)常(chang)对(dui)H(H)I(I)V(V)传(chuan)播(bo)的(de)信(xin)息(xi)了(le)解(jie)不(bu)足(zu),(,)以(yi)至(zhi)于(yu)在(zai)生(sheng)活(huo)中(zhong)产(chan)生(sheng)恐(kong)惧(ju)和(he)偏(pian)见(jian)。(。)H(H)I(I)V(V)主(zhu)要(yao)通(tong)过(guo)血(xue)液(ye)、(、)精(jing)液(ye)、(、)阴(yin)道(dao)分(fen)泌(mi)物(wu)和(he)母(mu)乳(ru)传(chuan)播(bo),(,)但(dan)并(bing)不(bu)是(shi)通(tong)过(guo)日(ri)常(chang)接(jie)触(chu)、(、)空(kong)气(qi)、(、)共(gong)用(yong)食(shi)物(wu)或(huo)水(shui)等(deng)方(fang)式(shi)传(chuan)播(bo)。(。)因(yin)此(ci),(,)公(gong)众(zhong)应(ying)该(gai)学(xue)习(xi)并(bing)传(chuan)播(bo)科(ke)学(xue)知(zhi)识(shi),(,)消(xiao)除(chu)对(dui)感(gan)染(ran)者(zhe)的(de)歧(qi)视(shi)与(yu)恐(kong)惧(ju),(,)创(chuang)造(zao)一(yi)个(ge)更(geng)加(jia)包(bao)容(rong)和(he)理(li)解(jie)的(de)环(huan)境(jing)。(。)其(qi)次(ci),(,)预(yu)防(fang)措(cuo)施(shi)的(de)教(jiao)育(yu)同(tong)样(yang)不(bu)可(ke)忽(hu)视(shi)。(。)使(shi)用(yong)安(an)全(quan)套(tao)、(、)进(jin)行(xing)定(ding)期(qi)检(jian)测(ce)和(he)采(cai)取(qu)暴(bao)露(lu)前(qian)预(yu)防(fang)((()P(P)r(r)E(E)P(P))())等(deng)措(cuo)施(shi),(,)可(ke)以(yi)显(xian)著(zhu)降(jiang)低(di)H(H)I(I)V(V)的(de)传(chuan)播(bo)风(feng)险(xian)。(。)然(ran)而(er),(,)在(zai)一(yi)些(xie)地(di)区(qu),(,)由(you)于(yu)缺(que)乏(fa)教(jiao)育(yu)资(zi)源(yuan)和(he)宣(xuan)传(chuan),(,)许(xu)多(duo)人(ren)对(dui)这(zhe)些(xie)预(yu)防(fang)措(cuo)施(shi)并(bing)不(bu)了(le)解(jie)。(。)此(ci)外(wai),(,)青(qing)少(shao)年(nian)和(he)高(gao)风(feng)险(xian)群(qun)体(ti)往(wang)往(wang)是(shi)预(yu)防(fang)教(jiao)育(yu)的(de)重(zhong)点(dian)对(dui)象(xiang),(,)通(tong)过(guo)校(xiao)园(yuan)活(huo)动(dong)和(he)社(she)区(qu)宣(xuan)传(chuan),(,)可(ke)以(yi)有(you)效(xiao)提(ti)高(gao)他(ta)们(men)的(de)自(zi)我(wo)保(bao)护(hu)意(yi)识(shi)。(。)最(zui)后(hou),(,)政(zheng)府(fu)和(he)非(fei)政(zheng)府(fu)组(zu)织(zhi)在(zai)推(tui)动(dong)H(H)I(I)V(V)防(fang)治(zhi)方(fang)面(mian)也(ye)扮(ban)演(yan)着(zhe)重(zhong)要(yao)角(jiao)色(se)。(。)需(xu)加(jia)大(da)对(dui)H(H)I(I)V(V)防(fang)治(zhi)项(xiang)目(mu)的(de)投(tou)资(zi),(,)保(bao)障(zhang)医(yi)疗(liao)资(zi)源(yuan)的(de)公(gong)平(ping)分(fen)配(pei),(,)尤(you)其(qi)是(shi)在(zai)资(zi)源(yuan)匮(kui)乏(fa)的(de)地(di)区(qu)。(。)同(tong)时(shi),(,)孕(yun)产(chan)妇(fu)的(de)H(H)I(I)V(V)检(jian)测(ce)和(he)治(zhi)疗(liao)也(ye)应(ying)成(cheng)为(wei)重(zhong)点(dian),(,)确(que)保(bao)母(mu)婴(ying)传(chuan)播(bo)的(de)风(feng)险(xian)降(jiang)到(dao)最(zui)低(di)。(。)综(zong)上(shang)所(suo)述(shu),(,)加(jia)强(qiang)对(dui)H(H)I(I)V(V)传(chuan)播(bo)途(tu)径(jing)和(he)预(yu)防(fang)措(cuo)施(shi)的(de)教(jiao)育(yu)与(yu)

发布于:北京市