Zobrazeno 1 - 10
of 284
pro vyhledávání: '"Carl Heiles"'
Autor:
Gyueun Park, Min-Young Lee, Shmuel Bialy, Blakesley Burkhart, J. R. Dawson, Carl Heiles, Di Li, Claire Murray, Hiep Nguyen, Anita Hafner, Daniel R. Rybarczyk, Snežana Stanimirović
Publikováno v:
The Astrophysical Journal, Vol 955, Iss 2, p 145 (2023)
We investigate the conditions for the H i -to-H _2 transition in the solar neighborhood by analyzing H i emission and absorption measurements toward 58 Galactic lines of sight (LOSs) along with ^12 CO(1–0) (CO) and dust data. Based on the accurate
Externí odkaz:
https://doaj.org/article/8a311c1fd3d64bea81dc8af932ad021b
Publikováno v:
Galaxies, Vol 5, Iss 4, p 66 (2017)
As radio polarised emission from astrophysical objects traverse through foreground magnetised plasma, the physical conditions along the lines of sight are encrypted in the form of rotation measure (RM). We performed broadband spectro-polarimetric obs
Externí odkaz:
https://doaj.org/article/336fccd958ae40829b82d4abd92cfad5
Autor:
Troland, Carl Heiles T. H.
We outline the theory and practice of measuring the four Stokes parameters of spectral lines in emission/absorption observations. We apply these concepts to our Arecibo HI absorption line data and present the results. We include a detailed discussion
Externí odkaz:
http://arxiv.org/abs/astro-ph/0311235
Autor:
Anita Petzler, J. R. Dawson, Hiep Nguyen, Carl Heiles, M. Wardle, M.-Y. Lee, Claire E. Murray, K. L. Thompson, Snežana Stanimirović
Publikováno v:
Publications of the Astronomical Society of Australia. 40
We present observations of the four 2 Pi 3/2 J = 3/2 ground-rotational state transitions of the hydroxyl molecule (OH) along 107 lines of sight both in and out of the Galactic plane: 92 sets of observations from the Arecibo telescope and 15 sets of o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79b9725c3e842352e915a7dc56b17f6e
https://doi.org/10.1017/pasa.2023.8
https://doi.org/10.1017/pasa.2023.8
Autor:
G. X. Luo, Ningyu Tang, Carl Heiles, Jifeng Xia, Sheng-Li Qin, Junzhi Wang, Di Li, Longfei Chen
We present high-sensitivity CH 9 cm ON/OFF observations toward 18 extra-galactic continuum sources that have been detected with OH 18 cm absorption in the Millennium survey with the Arecibo telescope. CH emission was detected toward six of eighteen s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9ea19daeef520e51755080fef4339d01
http://arxiv.org/abs/2109.07822
http://arxiv.org/abs/2109.07822
Autor:
Yik Ki Ma, Aritra Basu, S. A. Mao, S. K. Betti, Jeroen Stil, Jennifer West, Carl Heiles, Alex S. Hill
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 487:3432-3453
The NRAO VLA Sky Survey (NVSS) Rotation Measure (RM) catalogue is invaluable for the study of cosmic magnetism. However, the RM values reported in it can be affected by n$\pi$-ambiguity, resulting in deviations of the reported RM from the true values
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a48312df53f6e0f0c07262c81a226108
https://doi.org/10.1093/mnras/stz1325
https://doi.org/10.1093/mnras/stz1325
Autor:
Sihan Jiao, Zhi-Yun Li, Carl Heiles, Lei Qian, Youling Yue, Jing Tang, Tao-Chung Ching, Di Li
Magnetic fields play an important role in the evolution of interstellar medium and star formation. As the only direct tracer of interstellar field strength, credible Zeeman measurements remain sparse due to rather limited number of spectral lines wit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ce73fb203b028b8b808051e6e805815
https://doi.org/10.21203/rs.3.rs-343684/v1
https://doi.org/10.21203/rs.3.rs-343684/v1
Autor:
William T. Reach, Carl Heiles
The diffuse interstellar medium is dynamic, and its chemistry and evolution is determined by shock fronts as well as photodissociation. Shocks are implied by the supersonic motions and velocity dispersion often statistically called "turbulence". We c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::852254fdfbfe2f8235ce9fa55a38b3d4
Autor:
Nicholas Killerby-Smith, Claire E. Murray, Naomi McClure-Griffiths, Snežana Stanimirović, Carl Heiles, Min-Young Lee, John M. Dickey, W. M. Goss
Tracing the transition between the diffuse atomic interstellar medium (ISM) and cold, dense gas is crucial for deciphering the star formation cycle in galaxies. Here we present MACH, a new survey of cold neutral hydrogen (HI) absorption at $21\rm\,cm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b428a2178613606e4e7b7093b1297baa