Spectral variations of Lyman $\alpha$ emission within strongly lensed sources observed with MUSE
Spectral variations of Lyman $\alpha$ emission within strongly lensed sources observed with MUSE
复制标题
用 MUSE 观察到强透镜源内莱曼 $alpha$ 发射的光谱变化
DOI：
10.1093/mnras/stz2492
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发表时间：
2019
影响因子：
4.8
通讯作者：
Leiden University
中科院分区：
文献类型：
--
作者：
A. Claeyssens;J. Richard;J'em'ery Blaizot;T. Garel;F. Leclercq;V. Patrício;A. Verhamme;L. Wisotzki;R. Bacon;D. Carton;Benjamin Cl'ement;E. C. Herenz;R. Marino;S. Muzahid;R. Saust;Joop Schaye Cral;Observatoire de Geneve;Dark Cosmology Center;L. I. A. Potsdam;S. University;Eidgenossische Technische Hochschule Zurich;Leiden University
我们提出了一个分析的${\rmH\，\rm {\small {I}}$莱曼$\alpha $发射在深VLT/MUSE观测两个高度放大和扩展星系在$z = 3.5 $和4.03，包括一个新发现的，几乎完整的爱因斯坦环。虽然这些莱曼$\alpha $晕本质上类似于通常在其他MUSE深场看到的，引力透镜的好处使我们能够构建非常详细的莱曼$\alpha $线属性在次千秒差距尺度的地图。通过结合所有多幅图像，我们能够观察到莱曼$\alpha $发射的复杂结构，并发现每个晕内莱曼$\alpha $线轮廓形状的系统变化很小（莱曼$\alpha $峰移为120 $km s − 1），但在4 $\sigma $处很重要。事实上，我们观察到一个全球性的趋势，在大半径的线峰移变得更红，连同峰值波长和线宽之间的强相关性。这种系统的晕内变化是显着相似的对象到对象的变化，从最近的大样本的综合性能。高表面亮度区域对应于相对较小的线位移，这可能表明莱曼$\alpha $发射优先从线轮廓受莱曼$\alpha $光子散射影响不太严重的区域逃逸。
We present an analysis of ${\rm H\,\rm{\small {I}}}$ Lyman $\alpha$ emission in deep VLT/MUSE observations of two highly magnified and extended galaxies at $z=3.5$ and 4.03, including a newly discovered, almost complete Einstein ring. While these Lyman $\alpha$ haloes are intrinsically similar to the ones typically seen in other MUSE deep fields, the benefits of gravitational lensing allow us to construct exceptionally detailed maps of Lyman $\alpha$ line properties at sub-kpc scales. By combining all multiple images, we are able to observe complex structures in the Lyman $\alpha$ emission and uncover small ($\sim120$ km s−1 in Lyman $\alpha$ peak shift), but significant at $ \gt $4 $\sigma$, systematic variations in the shape of the Lyman $\alpha$ line profile within each halo. Indeed, we observe a global trend for the line peak shift to become redder at large radii, together with a strong correlation between the peak wavelength and line width. This systematic intrahalo variation is markedly similar to the object-to-object variations obtained from the integrated properties of recent large samples. Regions of high surface brightness correspond to relatively small line shifts, which could indicate that Lyman $\alpha$ emission escapes preferentially from regions where the line profile has been less severely affected by scattering of Lyman $\alpha$ photons.
莱曼α逃离高红移星系的物理学
影响因子：
4.8
作者：
Smith, Aaron;Ma, Xiangcheng;Bromm, Volker;Finkelstein, Steven L;Hopkins, Philip F;Faucher-Giguère, Claude-André;Kereš, Dušan
通讯作者：
Kereš, Dušan
DOI：
10.1088/0004-637x/797/1/11
发表时间：
2014-09
期刊：
The Astrophysical Journal
影响因子：
--
作者：
G. Östlin;M. Hayes;F. Duval;A. Sandberg;T. Rivera-Thorsen;T. Marquart;T. Marquart;I. Orlitová;I. Orlitová;A. Adamo;J. Melinder;L. Guaita;H. Atek;J. Cannon;P. Gruyters;E. C. Herenz;D. Kunth;P. Laursen;J. Mas-Hesse;G. Micheva;G. Micheva;H. Otí-Floranes;S. Pardy;S. Pardy;M. Roth;D. Schaerer;A. Verhamme
通讯作者：
G. Östlin;M. Hayes;F. Duval;A. Sandberg;T. Rivera-Thorsen;T. Marquart;T. Marquart;I. Orlitová;I. Orlitová;A. Adamo;J. Melinder;L. Guaita;H. Atek;J. Cannon;P. Gruyters;E. C. Herenz;D. Kunth;P. Laursen;J. Mas-Hesse;G. Micheva;G. Micheva;H. Otí-Floranes;S. Pardy;S. Pardy;M. Roth;D. Schaerer;A. Verhamme