• 氨分子(NH3)是宇宙中探测到的第一种多原子星际分子,其谱线包含了很多频率接近的精细跃迁,便于计算分子云的温度、密度等物理参数。
    较之于一氧化碳分子(CO),氨分子示踪的气体密度高一个量级(n~10⁴ cm⁻³),在低温时不易冻结耗散,特别适于观测研究分子云中的冷致密气体成分。
    新疆天文台恒星形成与演化团组科研人员使用南山26米射电望远镜对天鹰座巨分子云的小质量恒星形成区(Serpens South)和大质量恒星形成区(W40)进行NH₃(1,1)和(2,2)谱线成图观测研究, ...
    图1.利用南山26米射电望远镜对天鹰座恒星区域的NH₃观测,左图:NH₃(1,1)线 积分强度图;右图:NH₃(2,2)线积分强度图。
    新闻来源:http://www.xao.ac.cn/xwzx/kydt/202012/t20201204_5808412.html ...
  • for Proposals Semester 2021B Proposal Deadline: 25 March 202117:00 China Standard Time CFHT, P200 ...
    Note that: Proposals for the P200 can be accessed through theCOO solicitation information page.
    If scheduling a time constrained proposal (e.g., exoplanet transit), it is good to check with the observatory ...
    It isnotsufficient to simply say, "We require 2300s exposure time to reach S/N=10 for g=24 mag" ...
    ; if g=24 and S/N=10 are not also justified.
  • 他计划得到更多测光数据,以初步确定它的亮度演变和t2时间(从最大亮度变暗2星等所用的时间称为t2时间),之后再正式公布结果,因此我们还需要继续等待一段时间。
    他们在ATel#15779中确认AT 2022zyr是M31N 1984-07a有记录的第4次爆发,并初步得到它的t2时间为10.0±0.3天。
    G. Clark,R. M. Quimby,J. Bardwell,A. Choudhary,JT Markham-Adkison,C. Martin,P. Spalding,A.
    自从发现M31N 1984-07a的这次最新爆发以来,我们一直在跟踪M31N 2022-11b的亮度演变,以表征其光变曲线;特别是,要确定它达到最大亮度后变暗的速度(即它的t2时间)。
    Haberl, G. Sala, et al.
  • -N., De Cat, P., et al. 2020, ApJS, 251, 16 Fu, J.
    -N., De Cat, P., Zong, W., et al. 2020, RAA, 20, 167 Liu, N., Fu, J.
    -N., Zong, W., et al. 2019, RAA, 19. 75 Zong, W., Fu, J.
    -N., De Cat, P., et al. 2018, ApJS, 238, 30 De Cat, P., Fu, J.-N., Ren, A.
    ., et al. 2015, ApJS, 220, 19 新闻来源:http://www.nao.cas.cn/xwzx/kydt/202011/t20201118_5754470.html ...
  • Dyer, N. Koivisto, B. Davies, B. Godson, M. Pursiainen, P. Charalampopoulos, M. Magee, K.
    Dhillon, P. O'Brien, G. Ramsay, K. Noysena, R. Kotak, R. P. Breton, L. K. Nuttall, E.
    Bora(康科利天文台;匈牙利罗兰大学), T. Rom(UniST;UGA), P. Hernandez Cascales(UCM;CAB), D.
    Bisero(GEPI;巴黎天文台), G.I.E. Boudiba(阿尔及利亚天文学、天体物理学与地球物理学研究中心), A. Ikhsanova(帕多瓦大学), N.
    Orikhovski(斯洛伐克科学院天文研究所), B.N. Stoyanova(罗马第二大学), N. Takacs(康科利天文台;匈牙利罗兰大学), E.
  • 本文将介绍M31N 2017-01e两次再爆发——M31N 2022-03d和M31N 2019-09d的发现和证认过程。
    赵经远在进一步查验后确认了该目标的真实性,并将其上报至天文电报中央局(CBAT)和暂现源名称服务网(TNS),该目标获得候选体编号PNV J00441072+4154224、AT 2022fcy,内部编号PSP22P, ...
    图1 M31N 2022-03d发现图像 编号:M31N 2022-03d(=PNV J00441072+4154224=AT 2022fcy=PSP22P) 发现时间:2022年3月5日22 ...
    J00441072+4154224.html AT 2022fcy,Transient Name Server,https://www.wis-tns.org/object/2022fcy PSP22P, ...
    星明天文台官网,http://xjltp.china-vo.org/psp22p.html Allen W.
  • The LAMOST DR5 V1 A, F, G and K type star catalog lists 5,348,664 spectra information obtained by LAMOST ...
    October 24th 2011 and June 16th 2017, including 85,845 A type stars, 1,694,167 F type stars, 2,739,446 G ...
    These targets are selected with the criterions of S/N in g band greater than 6 in dark nights, and S/ ...
    N in g band greater than 15 in bright nights.
  • The fundamental stellar atmospheric parameters (T<SUB>eff</SUB> and log g) and 13 chemical abundances ...
    The stellar labels derived by SPCANet have precisions of 119 K for T<SUB>eff</SUB> and 0.17 dex for log ...
    g.
    The abundance precision of 11 elements including [C/H], [N/H], [O/H], [Mg/H], [Al/H], [Si/H], [S/H], ...
  • var csrf_token = "ImRhMjdjNGE4NjljZjVkYzg0MWVhNDgwYmUyYTVlMWQ1YmM4OGJmM2Mi.YgtNEQ.sxAbWRuUCDgIQknxH-Ix2X3OWnQ ...
    2020年11月01日-2021年01月31日观测项目 序号 项目编号 项目负责人 项目名称 项目简介 1 N2020_3 Zhu ...
    _0002 wangjingbo 1000 pulses in 1000 pulsars:observations of single pulses chosen through the P-Ṗ ...
    Commensal Program with FAST 68 PT2020_0170 Yang Chen FAST observation of SNR G57.2 ...
  • 该样本包含了银河系内的几十个红外暗云,观测波段是天马望远镜的K波段(18-26.5 GHz),主要探测的目标谱线是三条具有很强化学表征性的分子探针——氨分子(NH3)、硫化双碳( ...
    CCS)和氰基乙炔(HC3N)。
    注1:氨分子(NH3)被认为是星际介质的灵敏温度计。
    新闻来源:http://www.shao.cas.cn/2020Ver/xwdt/kyjz/202105/t20210519_6032174.html ...
  • The fundamental stellar atmospheric parameters (T<SUB>eff</SUB> and log g) and 13 chemical abundances ...
    The stellar labels derived by SPCANet have precisions of 119 K for T<SUB>eff</SUB> and 0.17 dex for log ...
    g.
    The abundance precision of 11 elements including [C/H], [N/H], [O/H], [Mg/H], [Al/H], [Si/H], [S/H], ...
  • The fundamental stellar atmospheric parameters (T<SUB>eff</SUB> and log g) and 13 chemical abundances ...
    The stellar labels derived by SPCANet have precisions of 119 K for T<SUB>eff</SUB> and 0.17 dex for log ...
    g.
    The abundance precision of 11 elements including [C/H], [N/H], [O/H], [Mg/H], [Al/H], [Si/H], [S/H], ...
  • The fundamental stellar atmospheric parameters (T<SUB>eff</SUB> and log g) and 13 chemical abundances ...
    The stellar labels derived by SPCANet have precisions of 119 K for T<SUB>eff</SUB> and 0.17 dex for log ...
    g.
    The abundance precision of 11 elements including [C/H], [N/H], [O/H], [Mg/H], [Al/H], [Si/H], [S/H], ...
  • ~P., Bennert N., Urry C.
    -Y., Wang J.-X., Zhang H.
    -T., Zheng Z., et al., 2022, ApJ, 927, 57. doi:10.3847/1538-4357/ac4bd9 新闻来源:https://mp.weixin.qq.com ...
  • 2013-10c非常接近,怀疑它可能是M31N 2013-10c的又一次爆发,因此M31N 2013-10c可能是一颗再发新星。
    中等帕洛玛暂现源工厂(iPTF)的后随观测表明,M31N 2013-10c在R波段的峰值亮度是17.3星等,t2时间(即从峰值亮度变暗2等所用的时间)为10.4±0.4天。
    M31N 2013-10c相对快速的演变速度(t2 = 10.4天;Soraisam et al. 2017, A&A, 599, A48),以及从AT 2023yoa观测到的宽阔的H&alpha ...
    为了证实M31N 2023-11f与M31N 2013-10c之间的关系,我们将M31N 2023-11f的图像(由拉古纳山天文台于世界时2023年11月29.151日拍摄)与M31N 2013-10c ...
    Barway、G.
  • Observers J.Lou,D.Hu,Q.Qiao,W.Gao,X.Liao,S.Liu,S.Li,Y.Shen,A.Li,L.Liao,H.Xue,K.Yua</div> <div> n,X.Zhang ...
    ,C.Ji,Y.Yu,Q.Hui,L.Li,X.Wang,B.Tian,Q.Yin,G.Sun,X.Gao, Measurers G.Sun 0.36-m f/6.9 Schmidt-Cassegrain ...
    <span style="color: rgb(255, 0, 0);">3、内部编号:PSP16G</span></p> <div> 2016年2月29日通过PSP公众超新星巡天项目发现, ...
    Observers W.Gao,Y.Shen,Z.Zhang,D.Hu,H.Xue,M.Zhang,Q.Yin,Y.Yu,J.Xu,L.Liao,Y.Lou,L.Li,W.Song,S.Gu,C.Ji, ...
    X.Wang,T.Tu,A.Wang,S.Yin,G.Sun,X.Gao, Measurers G.Sun 0.36-m f/6.9 Schmidt-Cassegrain telescope and CCD ...
  • columns 4–5 are the spectroscopy types classified by the LAMOST 1D pipeline and the LAMOST spectral S/N ...
    of g-band, columns 6–10 are the correction factors (k) of each parameter.
  • columns 4-5 are the spectroscopy types classified by the LAMOST 1D pipeline and the LAMOST spectral S/N ...
    of g-band, columns 6-10 are the correction factors (k) of each parameter.
  • columns 4-5 are the spectroscopy types classified by the LAMOST 1D pipeline and the LAMOST spectral S/N ...
    of g-band, columns 6-10 are the correction factors (k) of each parameter.
  • 该目标发现时星等约15.8G,内部编号PSP20A,候选体编号PNV J00422347+4108228、AT 2020lye。
    S/N相对较差,但Na I D和Si II谱线显示出清晰的天鹅座P型星谱线轮廓。我们测量Hα线的半高全宽为2100km/s左右。
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