Ido Finkelman, Noah Brosch, José G. Funes S. J., Alexei Y. Kniazev, Petri Väisänen
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28 pages, 15 figures and 10 tables. Minor corrections included to match published MNRAS version. R-band contour maps are low-resolution versions of those used in the MNRAS version
We report the results of multicolour observations of 30 E/S0 galaxies with dust lanes. For each galaxy we obtained broad-band images and narrow-band images using interference filters isolating the Hα+[NII] emission lines to derive the amount and morphology of dust and ionized gas. To improve the wavelength coverage we retrieved data from the SDSS and 2MASS and combined these with our data. Ionized gas is detected in 25 galaxies and shows in most cases a smooth morphology, although knots and filamentary structure are also observed in some objects. The extended gas distribution closely follows the dust structure, with a clear correlation between the mass of both components. An extinction law by the extragalactic dust in the dark lanes is derived and is used to estimate the dust content of the galaxies. The derived extinction law is used to correct the measured colours for intrinsic dust extinction and the data are fitted with a stellar population synthesis model. We find that the H-alpha emission and colours of most objects are consistent with the presence of an "old" stellar population (~10 Gyr) and a small fraction of a "young" population (~10-100 Myr). To check this we closely examine NGC5363, for which archival Spitzer/IRAC and GALEX data are available, as a representative dust-lane E/S0 galaxy of the sample.
研究合并星系中分子气体的性质，为相互作用引发的星暴的发生和演化提供了重要线索。CO/13 CO 1-0线强度比可以用作动力学和恒星形成过程如何影响气体性质的示踪剂。美杜莎星系（NGC~4194）的LFIR/LCO比与超亮星系（ULIRGs）的LFIR/LCO比相当，这表明美杜莎星系的恒星形成效率（SFE）非常高。对美杜莎星系中CO和13 CO 1-0的干涉OVRO观测表明，CO/13 CO强度比从星系外部（r>2 kpc）的正常静止值（7- 1 - 0）增加到中心（r<1 kpc）星暴区的高值（16->40）。在中心有一个东西向的梯度，其中线比的变化超过5”（945 pc）的三倍。13 CO的综合排放峰值出现在星爆区的西北部，而中心CO的排放则与显著的交叉尘埃带有很强的相关性。我们讨论的背景下，在恒星爆发和中央尘埃带的气体性质的中央东西梯度。我们认为中心梯度主要是由尘埃带中的扩散气体引起的。在这种情况下，实际的分子量分布是更好地跟踪13 CO 1-0排放比CO。温度和丰度梯度的可能性也进行了讨论。我们比较了中央气体的美杜莎的其他未成年人合并的属性，并建议美杜莎恒星形成活动的极端和短暂的阶段具有类似的特点，高红移星系。
Cosmoglobe DR2. V. Spatial correlations between thermal dust and ionized carbon emission in Planck HFI and COBE-DIRBE
Institute of Theoretical Astrophysics, University of Oslo（奥斯陆大学理论天体物理研究所）；Dipartimento di Fisica, Università degli Studi di Milano（米兰大学物理系）；Laboratoire de Physique des 2 infinis – Irène Joliot Curie (IJCLab)（双无穷物理实验室——伊雷娜·约里奥-居里实验室）；Department of Space, Earth and Environment, Chalmers University of Technology（查尔姆斯理工大学空间、地球与环境系）；Università di Trento（特伦托大学）；INFN sezione di Milano（意大利国家核物理研究院米兰分部）
The Ionized Absorber and Nuclear Environment of IRAS 13349+2438: Multi-wavelength insights from coordinated Chandra HETGS, HST STIS, HET, and Spitzer IRS
Cold molecular gas distribution and kinematics in the low-metallicity dusty starburst of Mrk 996 resolved with ALMA
Universidad de Talca（塔尔卡大学）；Universidad de La Serena（拉塞雷纳大学）；Instituto de Astrofísica de Andalucía, CSIC（安达卢西亚天体物理学研究所，西班牙国家研究委员会）；Centro de Estudios de Física del Cosmos de Aragón (CEFCA)（阿拉贡宇宙物理研究中心）；University of Michigan（密歇根大学）；Space Telescope Science Institute（太空望远镜科学研究所）；INAF - Osservatorio Astronomico di Roma（意大利国家天体物理研究所罗马天文台）
