Results 21 to 30 of about 210,358 (255)

Properties of Interstellar Medium in the S0 Galaxy NGC 1222: Evidence for Shock-enhanced Line Emission

The Astrophysical Journal
In this paper, we present a comprehensive study on the properties of the interstellar medium in NGC 1222, a star-forming early-type merging galaxy that forms a triple system, using optical and far-infrared spectroscopic, and multiband photometric data ...
Jiamin Liu, Yinghe Zhao, Kai-Xing Lu, Jin-Ming Bai   +3 more
doaj   +3 more sources

The MOSDEF Survey: Sulfur Emission-line Ratios Provide New Insights into Evolving Interstellar Medium Conditions at High Redshift [PDF]

Astrophysical Journal, 2019
We present results on the emission-line properties of 1.3 ≤ z ≤ 2.7 galaxies drawn from the complete the MOSFIRE Deep Evolution Field (MOSDEF) survey. Specifically, we use observations of the emission-line diagnostic diagram of [O iii]λ 5007/Hβ versus [S
A. Shapley, R. Sanders, P. Shao, N. Reddy, M. Kriek, A. Coil, B. Mobasher, B. Siana, I. Shivaei, W. Freeman, M. Azadi, S. Price, G. Leung, T. Fetherolf, L. D. Groot, T. Zick, F. Fornasini, G. Barro   +17 more
semanticscholar   +1 more source

New and Improved Lyα Reconstructions for M and K Dwarfs

The Astrophysical Journal, 2023
The Ly α emission line is the brightest UV emission line in M and K dwarf spectra and serves as an important tool for studies of stellar chromospheres, the interstellar medium, and exoplanet atmospheres.
Angeli Sandoval, Allison Youngblood, R. O. Parke Loyd, Kevin France   +3 more
doaj   +1 more source

Probing cosmic dawn with emission lines: predicting infrared and nebular line emission for ALMA and JWST [PDF]

Monthly notices of the Royal Astronomical Society, 2019
Infrared and nebular lines provide some of our best probes of the physics regulating the properties of the interstellar medium (ISM) at high redshift. However, interpreting the physical conditions of high-redshift galaxies directly from emission lines ...
H. Katz, T. P. Galligan, T. Kimm, J. Rosdahl, M. Haehnelt, J. Blaizot, J. Devriendt, A. Slyz, N. Laporte, R. Ellis   +9 more
semanticscholar   +1 more source

An Interstellar Emission Line from Isocyanic Acid at 1.4 Centimeters

The Astrophysical Journal, 1972
D. Buhl, L. Snyder, J. Edrich
semanticscholar   +2 more sources

A Complete HCN Survey of the Perseus Molecular Cloud

The Astrophysical Journal, 2023
We present a survey of the Perseus molecular cloud in the J = 1 → 0 transition of HCN, a widely used tracer of dense molecular gas. The survey was conducted with the CfA 1.2 m telescope, which at 89 GHz has a beamwidth of 11′ and a spectral resolution of
T. M. Dame, Charles J. Lada
doaj   +1 more source

Planetary Nebulae and the Ionization of the Interstellar Medium in Galaxies

Frontiers in Astronomy and Space Sciences, 2022
We discuss the role of planetary nebulae and their progeny in galaxy context in terms of ionization of the galaxy interstellar medium. This regards ionized gas outside the disk of spiral galaxies, the diffuse ionized medium in spiral galaxies, and the ...
Grażyna Stasińska, Marina Trevisan, Natalia Vale Asari   +2 more
doaj   +1 more source

Measurement of Ultra-High-Energy Diffuse Gamma-Ray Emission of the Galactic Plane from 10 TeV to 1 PeV with LHAASO-KM2A. [PDF]

Physical Review Letters, 2023
The diffuse Galactic γ-ray emission, mainly produced via interactions between cosmic rays and the interstellar medium and/or radiation field, is a very important probe of the distribution, propagation, and interaction of cosmic rays in the Milky Way.
Z. Cao, F. Aharonian, Q. An, Axikegu, Y. Bai, Y. Bao, D. Bastieri, X. Bi, Y. Bi, J. Cai, Q. Cao, W. Cao, Z. Cao, J. Chang, J. Chang, A. Chen, E. Chen, Liang Chen, Lin Chen, Long Chen, M. Chen, M. Chen, Q. Chen, S. Chen, S. Z. Chen, T. Chen, Y. Chen, N. Cheng, Y. Cheng, M. Cui, S. Cui, X. Cui, Y. Cui, B. Dai, H. Dai, Z. Dai, Danzengluobu, D. Volpe, X. Dong, K. Duan, J. Fan, Y. Fan, J. Fang, K. Fang, C. Feng, L. Feng, S. Feng, X. Feng, Y. Feng, S. Gabici, B. Gao, C. Gao, L. Gao, Q. Gao, W. Gao, W. Gao, M. Ge, L. Geng, G. Giacinti, G. Gong, Q. Gou, M. Gu, F. Guo, X. Guo, Y. Guo, Y. Guo, Y. Han, H. He, Haoyu He, J. Y. He, X. He, Y. He, M. Heller, Y. Hor, B. Hou, C. Hou, X. Hou, H. Hu, Q. Hu, S. Hu, D. Huang, T. Q. Huang, W. Huang, X. Huang, X. Y. Huang, Y. Huang, Z. Huang, X. Ji, H. Jia, K. Jia, K. Jiang, X. W. Jiang, Z. Jiang, M. Jin, M. Kang, T. Ke, D. Kuleshov, K. Kurinov, B. Li, Cheng Li, Cong Li, D. Li, F. Li, H. Li, H. C. Li, H. Li, J. Li, Jian Li, Jie Li, K. Li, W. Li, X. Li, Xin Li, Y. Li, Zhe Li, Zhuo Li, E. Liang, Y. Liang, S. Lin, B. Liu, C. Liu, D. Liu, H. Liu, H. Liu, J. Liu, J. Liu, J. Liu, M. Liu, R. Liu, S. M. Liu, W. Liu, Y. Liu, Y. N. Liu, R. Lu, Q. Luo, H. Lv, B. Ma, L. Ma, X. Ma, J. Mao, Z. Min, W. Mitthumsiri, H. Mu, Y. Nan, A. Neronov, Z. Ou, B. Pang, P. Pattarakijwanich, Z. Pei, M. Qi, Y. Qi, B. Qiao, J. Qin, D. Ruffolo, Alejandro Sáiz, D. Semikoz, C. Shao, L. Shao, O. Shchegolev, X. Sheng, F. Shu, H. Song, Y. Stenkin, V. Stepanov, Y. Su, Q. N. Sun, X. Sun, Z. Sun, P. Tam, Q. Tang, Z. Tang, W. Tian, C. Wang, C. Wang, G. W. Wang, H. Wang, H. H. Wang, J. Wang, K. Wang, L. Wang, L. Y. Wang, P. Wang, R. Wang, W. Wang, X. Wang, X. Y. Wang, Y. Wang, Y. Wang, Y. J. Wang, Z. H. Wang, Z. X. Wang, Zhen Wang, Z. Wang, D. Wei, J. Wei, Y. J. Wei, T. Wen, C. Y. Wu, H. Wu, S. Wu, Xin Wu, Y. Wu, S. Xi, J. Xia, J. Xia, G. Xiang, D. Xiao, G. Xiao, G. Xin, Y. Xin, Yangang Xing, Z. Xiong, D. Xu, R. Xu, R. Xu, W. Xu, L. Xue, Dong Yan, J. Yan, T. Yan, C. Yang, F. Yang, F. Yang, H. W. Yang, J. Y. Yang, L. L. Yang, M. Yang, R. Yang, S. Yang, Y. Yao, Z. Yao, Y. Ye, L. Yin, N. Yin, X. You, Z. You, Y. Yu, Q. Yuan, H. Yue, H. Zeng, T. Zeng, W. Zeng, M. Zha, B. Zhang, F. Zhang, H. Zhang, H. Zhang, J. Zhang, L. X. Zhang, Li Zhang, P. Zhang, P. Zhang, R. Zhang, S. B. Zhang, S. Zhang, S. Zhang, X. Zhang, X. Zhang, Y. Zhang, Yi. Zhang, Yong Zhang, B. Zhao, J. Zhao, Liang Zhao, L. Zhao, S. Zhao, F. Zheng, B. Zhou, H. Zhou, J. Zhou, M. Zhou, P. Zhou, R. Zhou, X. Zhou, C. Zhu, F. Zhu, H. Zhu, K. Zhu, X. Zuo   +278 more
semanticscholar   +1 more source

Deuterated Polycyclic Aromatic Hydrocarbons in the Interstellar Medium: The Aliphatic C–D Band Strengths

The Astrophysical Journal Supplement Series, 2023
Deuterium (D) was exclusively generated in the Big Bang, and the standard Big Bang nucleosynthesis (BBN) model predicts a primordial abundance of D/H ≈ 26 parts per million (ppm). As the Galaxy evolves, D/H gradually decreases because of astration.
X. J. Yang, Aigen Li
doaj   +1 more source

A Herschel/PACS Far-infrared Line Emission Survey of Local Luminous Infrared Galaxies [PDF]

, 2017
We present an analysis of , [O iii]88, [N ii]122, and far-infrared (FIR) fine-structure line observations obtained with Herschel/PACS, for ∼240 local luminous infrared galaxies (LIRGs) in the Great Observatories All-sky LIRG Survey.
T. Díaz-Santos, L. Armus, V. Charmandaris, N. Lu, S. Stierwalt, S. Stierwalt, G. Stacey, S. Malhotra, P. Werf, J. Howell, G. Privon, G. Privon, J. Mazzarella, P. Goldsmith, E. Murphy, L. Barcos-Mũnoz, S. Linden, S. Linden, H. Inami, K. Larson, A. Evans, A. Evans, P. Appleton, K. Iwasawa, S. Lord, D. Sanders, J. Surace   +26 more
semanticscholar   +1 more source