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arXiv 2501.19397astro-ph.GA
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一种用于从JWST MIRI成像中提取PAH通量的光谱校准方法

A Spectroscopically Calibrated Prescription for Extracting PAH Flux from JWST MIRI Imaging

Grant P. Donnelly, Thomas S. -Y. Lai, Lee Armus, Tanio Díaz-Santos, Kirsten L. Larson, Loreto Barcos-Muñoz, Marina Bianchin, Thomas Bohn, Torsten Böker, Victori… 展开作者

Grant P. Donnelly, Thomas S. -Y. Lai, Lee Armus, Tanio Díaz-Santos, Kirsten L. Larson, Loreto Barcos-Muñoz, Marina Bianchin, Thomas Bohn, Torsten Böker, Victorine A. Buiten, Vassilis Charmandaris, Aaron S. Evans, Justin Howell, Hanae Inami, Darshan Kakkad, Laura Lenkić, Sean T. Linden, Cristina M. Lofaro, Matthew A. Malkan, Anne M. Medling, George C. Privon, Claudio Ricci, J. D. T. Smith, Yiqing Song, Sabrina Stierwalt, Paul P. van der Werf, Vivian U

AI总结:

提出一种从JWST/MIRI宽带图像估算PAH 7.7和11.3微米通量的校准方法,利用GOALS中4个LIRG的267个MIRI/MRS光谱确定最佳滤光片组合,使预测通量与光谱拟合值误差在约5%至7%内。

摘要:

我们提出了一种方法,用于从宽带JWST/MIRI图像中估算7.7微米和11.3微米多环芳烃(PAH)特征的通量。与MIRI光谱图相比,使用MIRI成像数据探测PAH通量在视场、空间分辨率和灵敏度方面具有优势,但需要与光谱进行比较,以在各种环境中校准这些通量估算。对于来自Great Observatories All-sky LIRG Survey (GOALS)早期发布科学计划中四个发光红外星系(LIRGs)独立区域的267个MIRI/MRS光谱,我们推导了合成滤光片测光,并将估算的PAH通量与通过详细光谱拟合测量的通量进行了直接比较。我们发现,对于探测PAH 7.7微米,最佳的滤光片组合是F560W、F770W以及F1500W或F2100W,而对于PAH 11.3微米,最佳组合是F560W、F1000W、F1130W和F1500W。使用这些组合的方法得出的预测通量密度,对于PAH 7.7和11.3微米,通常分别与光谱分解的值在约7%和约5%的范围内一致。

英文摘要:

We introduce a prescription for estimating the flux of the 7.7 micron and 11.3 micron\ polycyclic aromatic hydrocarbon (PAH) features from broadband JWST/MIRI images. Probing PAH flux with MIRI imaging data has advantages in field of view, spatial resolution, and sensitivity compared with MIRI spectral maps, but comparisons with spectra are needed to calibrate these flux estimations over a wide variety of environments. For 267 MIRI/MRS spectra from independent regions in the four luminous infrared galaxies (LIRGs) in the Great Observatories All-sky LIRG Survey (GOALS) early release science program, we derive synthetic filter photometry and directly compare estimated PAH fluxes to those measured from detailed spectral fits. We find that for probing PAH 7.7 micron, the best combination of filters is F560W, F770W, and either F1500W or F2100W, and the best for PAH 11.3 micron is F560W, F1000W, F1130W, and F1500W. The prescription with these combinations yields predicted flux densities that typically agree with values from spectral decomposition within ~7% and ~5% for PAH 7.7 and 11.3 micron, respectively.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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