The case for a 'sub-millimeter SDSS': a 3D map of galaxy evolution to z~10
James E. Geach, Manda Banerji, Frank Bertoldi, Matthieu Bethermin, Caitlin M. Casey, Chian-Chou Chen, David L. Clements, Claudia Cicone, Francoise Combes, Chris… 展开作者
James E. Geach, Manda Banerji, Frank Bertoldi, Matthieu Bethermin, Caitlin M. Casey, Chian-Chou Chen, David L. Clements, Claudia Cicone, Francoise Combes, Christopher Conselice, Asantha Cooray, Kristen Coppin, Emanuele Daddi, Helmut Dannerbauer, Romeel Dave, Matthew Doherty, James S. Dunlop, Alastair Edge, Duncan Farrah, Maximilien Franco, Gary Fuller, Tracy Garratt, Walter Gear, Thomas R. Greve, Evanthia Hatziminaoglou, Christopher C. Hayward, Rob J. Ivison, Ryohei Kawabe, Pamela Klaassen, Kirsten K. Knudsen, Kotaro Kohno, Maciej Koprowski, Claudia D. P. Lagos, Georgios E. Magdis, Benjamin Magnelli, Sean L. McGee, Michal Michalowski, Tony Mroczkowski, Omid Noroozian, Seb Oliver, Dominik Riechers, Wiphu Rujopakarn, Douglas Scott, Stephen Serjeant, Matthew W. L. Smith, Mark Swinbank, Yoichi Tamura, Paul van der Werf, Eelco van Kampen, Aprajita Verma, Joaquin Vieira, Jeff Wagg, Fabian Walter, Lingyu Wang, Al Wootten, Min S. Yun
备注:
Science White paper submitted to the Astro2020 Decadal Survey
The Sloan Digital Sky Survey (SDSS) was revolutionary because of the extraordinary breadth and ambition of its optical imaging and spectroscopy. We argue that a 'sub-millimeter SDSS' - a sensitive large-area imaging+spectroscopic survey in the sub-mm window - will revolutionize our understanding of galaxy evolution in the early Universe. By detecting the thermal dust continuum emission and atomic and molecular line emission of galaxies out to z~10 it will be possible to measure the redshifts, star formation rates, dust and gas content of hundreds of thousands of high-z galaxies down to ~L*. Many of these galaxies will have counterparts visible in the deep optical imaging of the Large Synoptic Survey Telescope. This 3D map of galaxy evolution will span the peak epoch of galaxy formation all the way back to cosmic dawn, measuring the co-evolution of the star formation rate density and molecular gas content of galaxies, tracking the production of metals and charting the growth of large-scale structure.
Weeds: a CLASS extension for the analysis of millimeter and sub-millimeter spectral surveys
大瞬时带宽接收器和高光谱分辨率光谱仪在(亚)毫米望远镜上的出现,为无偏光谱测量开辟了可能性。由于它们包含大量数据,对这些调查的任何分析都需要专门的软件工具。在这里,我们提出了一个广泛使用的类软件,我们为此目的开发的扩展。这个扩展名为Weeds,允许在原子和分子线数据库(例如JPL或CDMS)中进行搜索,这些数据库可以使用虚拟天文台(VO)兼容协议通过互联网访问。该软件包允许快速导航整个光谱调查,以寻找一个给定的物种线。Weeds还能够对光谱进行建模,这通常需要用于线识别。我们预计,杂草将有助于分析和解释光谱调查,将与Herschel上的HIFI仪器完成,但也与地面毫米和亚毫米望远镜和干涉仪,如IRAM-30 m和Plateau de Bure,CARMA,SMA,eVLA和ALMA进行观测。
New ultracool subdwarfs identified in large-scale surveys using Virtual Observatory tools: II. SDSS DR7 vs UKIDSS LAS DR6, SDSS DR7 vs UKIDSS LAS DR8, SDSS DR9 vs UKIDSS LAS DR10, and SDSS DR7 vs 2MASS
我们的目标是发展一种有效的方法来寻找晚型次矮星(光谱类型>M5的金属耗尽矮星),以改善目前的统计。我们的目标是:提高我们对贫金属低质量矮星的认识,弥合晚M型和L型之间的差距,确定它们的表面密度,并了解金属丰度对恒星和亚恒星质量函数的影响。我们使用STILTS、Aladin和Topcat对SDSS、2 MASS和UKIDSS进行了交叉匹配搜索。我们考虑了不同的光度和自行标准,我们的选择。我们确定了29和71晚型亚矮星候选人在每个交叉相关超过8826和3679平方度,分别。我们获得了71个候选人的低分辨率光谱与GTC,NOT和VLT和检索光谱的30个候选人从SDSS光谱数据库。我们分类92候选人的101光谱的基础上使用两种方法:光谱指数和比较与模板已知的次矮星。我们分别从SDSS与2 MASS和SDSS与UKIDSS交叉匹配中确认了86%和94%的候选者为晚型次矮星。这些次矮星的光谱类型介于M5和L0.5之间,SDSS星等在r=19.4-23.3等范围内。我们新发现的晚型M包括49颗次矮星、25颗极端次矮星、6颗超次矮星、1颗次矮星/极端次矮星和2颗矮星/次矮星。在SDSS DR 7与UKIDSS LAS DR 10的交叉比对中,我们得出晚型次矮星的表面密度为每平方度0.040 $^{+0.012}_{-0.007}$。我们还检查了已知和新的亚矮星的AllWISE测光,发现M亚矮星的中…
Sub-millimeter wavelength protostellar accretion rate monitoring with AtLAST
Max-Planck-Institute for Extraterrestrial Physics(马克斯·普朗克地外物理研究所);Thüringer Landessternwarte Tautenburg(图林根州陶滕堡天文台);NRC Herzberg Astronomy and Astrophysics Research Centre & University of Victoria(加拿大国家研究委员会赫茨伯格天文学与天体物理学研究中心和维多利亚大学);Kavli Institute for Astronomy and Astrophysics, Peking University(北京大学卡尔·古斯塔夫·凯夫利天文学与天体物理学研究所);University of Toledo(托莱多大学);Finnish Centre for Astronomy with ESO(芬兰ESO天文学中心);NTNU(挪威科技大学)
MOLLId: software for automatic identification of spectral molecular lines in the sub-millimeter and millimeter bands and its application to the spectra of protostars from the region RCW 120
Institute of Astronomy, Russian Academy of Sciences(俄罗斯科学院天文研究所);Ural Federal University named after the first President of Russia B. N. Yeltsin(叶利钦乌拉尔联邦大学)
Dust continuum emission and the upper limit fluxes of sub-millimeter water lines of the protoplanetary disk around HD 163296 observed by ALMA
本文利用阿塔卡玛大型毫米/亚毫米波阵列(ALMA),分析了Herbig Ae星HD 163296周围原行星盘的亚毫米波正H $_{2}$ $^{16}$ O 321 GHz、paraH $_{2}$ $^{18}$ O 322 GHz和HDO 335 GHz谱线的上限通量。这些水线被认为是最好的候选亚毫米线定位的H $_{2}$ O雪线的位置,在我们以前的模式计算的基础上。我们比较了上限通量与我们的模式计算的值与尘埃排放,我们约束的线发射区域和尘埃不透明度的观测。我们的结论是,如果高水蒸气丰度区的外缘和水雪线的位置也超过8 au,则毫米尘埃不透明度值将大于2.0 cm $^{2}$ g $^{-1}$。此外,如果mm尘埃不透明度为2.0 cm $^{2}$ g $^{-1}$,则水雪线的位置将在20 au以内。未来的观测尘埃连续辐射在更高的角分辨率和亚毫米水线与更长的观测时间需要澄清的详细结构和位置的H $_{2}$ O雪线在磁盘中面。