Zobrazeno 1 - 10
of 184
pro vyhledávání: '"Interstellar absorption"'
Autor:
Nickolas M. Pingel, Hongxing Chen, Snežana Stanimirović, Eric W. Koch, Adam K. Leroy, Erik Rosolowsky, Chang-Goo Kim, Julianne J. Dalcanton, Fabian Walter, Michael P. Busch, Ryan Chown, Jennifer Donovan Meyer, Cosima Eibensteiner, Deidre A. Hunter, Sumit K. Sarbadhicary, Elizabeth Tarantino, Vicente Villanueva, Thomas G. Williams
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 1, p 93 (2024)
Measuring the properties of the cold neutral medium (CNM) in low-metallicity galaxies provides insights into heating and cooling mechanisms in early Universe-like environments. We report detections of two localized atomic neutral hydrogen (H i ) abso
Externí odkaz:
https://doaj.org/article/ffcdf0edea654c2cbdb88dc49be12e14
Autor:
Christa Gall, Jens Hjorth, Lise Christensen, Luca Izzo, Paolo A. Mazzali, Mark M. Phillips, Peter Hoeflich, Charlotte Angus, Cecilie Cold, Jonatan Selsing
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 1, p 114 (2024)
The origin of strong sodium absorption, which has been observed for a few nearby Type Ia supernovae (SNe Ia), remains elusive. Here we analyze two high-signal-to-noise, intermediate-resolution Very Large Telescope/X-shooter spectra at epochs +18 and
Externí odkaz:
https://doaj.org/article/4f50380813634bcca472da1c592651e6
Autor:
Tarek Trabelsi, Joseph S. Francisco
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 1, p 37 (2024)
The chemistry within the interstellar medium (ISM) is notably influenced by the interplay between kinetics and photochemical processes, which play significant roles in both the formation and destruction of molecular species. This study focuses on the
Externí odkaz:
https://doaj.org/article/fed40fba69cd4291bc4339caadcf58d3
Autor:
Natasha Hurley-Walker, L. D. Anderson, M. Luisi, N. M. McClure-Griffiths, Robert A. Benjamin, Michael A. Kuhn, Dylan J. Linville, B. Liu, Catherine Zucker
Publikováno v:
The Astrophysical Journal, Vol 969, Iss 1, p 42 (2024)
The Galactic center lobe (GCL) is a ∼1° object located north of the Galactic center. In the mid-infrared, the GCL appears as two 8.0 μ m filaments that roughly define an ellipse. There is strong 24 μ m and radio continuum emission in the interio
Externí odkaz:
https://doaj.org/article/71e11db08c38490aaf8598b4def8c9e9
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 2, p 120 (2024)
We describe recent spectroscopic observations of red giant stars made by the Space Telescope Imaging Spectrograph (STIS) instrument on board the Hubble Space Telescope, which has provided spatially resolved observations of the warm chromospheric wind
Externí odkaz:
https://doaj.org/article/1b70352f458b498ca375683d83ad1e19
Autor:
Aleksandra Hamanowicz, Kirill Tchernyshyov, Julia Roman-Duval, Edward B. Jenkins, Marc Rafelski, Karl D. Gordon, Yong Zheng, Miriam Garcia, Jessica Werk
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 1, p 80 (2024)
The cycling of metals between interstellar gas and dust is a critical aspect of the baryon cycle of galaxies, yet our understanding of this process is limited. This study focuses on understanding dust depletion effects in the low-metallicity regime (
Externí odkaz:
https://doaj.org/article/1136b1f06e414fedbd4247a53d66391c
Autor:
Renzhi Su, Minfeng Gu, S. J. Curran, Elizabeth K. Mahony, Ningyu Tang, James R. Allison, Di Li, Ming Zhu, J. N. H. S. Aditya, Hyein Yoon, Zheng Zheng, Zhongzu Wu
Publikováno v:
The Astrophysical Journal Letters, Vol 956, Iss 1, p L28 (2023)
In this letter, we report the discovery of a fast neutral hydrogen outflow in SDSS J145239.38+062738.0, a merging radio galaxy containing an optical type I active galactic nucleus (AGN). This discovery was made through observations conducted by the F
Externí odkaz:
https://doaj.org/article/26f88f04b7f742a8b2f1ada4b4f8b535
Autor:
Xiaojing Lin, Zheng Cai, Siwei Zou, Zihao Li, Zuyi Chen, Fuyan Bian, Fengwu Sun, Yiping Shu, Yunjing Wu, Mingyu Li, Jianan Li, Xiaohui Fan, J. Xavier Prochaska, Daniel Schaerer, Stephane Charlot, Daniel Espada, Miroslava Dessauges-Zavadsky, Eiichi Egami, Daniel Stark, Kirsten K. Knudsen, Gustavo Bruzual, Jacopo Chevallard
Publikováno v:
The Astrophysical Journal Letters, Vol 944, Iss 2, p L59 (2023)
Direct observations of low-mass, low-metallicity galaxies at z ≳ 4 provide an indispensable opportunity for detailed inspection of the ionization radiation, gas flow, and metal enrichment in sources similar to those that reionized the universe. Com
Externí odkaz:
https://doaj.org/article/03945d44bdea40e8839a9b17a6df81ce
Autor:
Keerthi Vasan G. C., Tucker Jones, Ryan L. Sanders, Richard S. Ellis, Daniel P. Stark, Glenn G. Kacprzak, Tania M. Barone, Kim-Vy H. Tran, Karl Glazebrook, Colin Jacobs
Publikováno v:
The Astrophysical Journal, Vol 959, Iss 2, p 124 (2023)
We study the kinematics of the interstellar medium (ISM) viewed “down the barrel” in 20 gravitationally lensed galaxies during cosmic noon ( z = 1.5–3.5). We use moderate-resolution spectra ( R ∼ 4000) from Keck’s Echellette Spectrograph an
Externí odkaz:
https://doaj.org/article/83b95ecf72c1405f906ab122b981fa7f
Publikováno v:
The Astrophysical Journal, Vol 952, Iss 1, p 88 (2023)
Absorption line spectroscopy offers one of the best opportunities to constrain the properties of galactic outflows and the environment of the circumgalactic medium. Extracting physical information from line profiles is difficult; however, for the phy
Externí odkaz:
https://doaj.org/article/50cd626e655a4cd09e28e7e19cc8c018