Zobrazeno 1 - 10
of 177
pro vyhledávání: '"Far-infrared astronomy"'
Autor:
Ilsang Yoon
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 15 (2024)
We introduce a simple parametric model of the radio–infrared correlation (i.e., the ratio between the IR luminosity and the 1.4 GHz radio luminosity, q _IR ) by considering the energy loss rate of high-energy cosmic-ray (CR) electrons governed by r
Externí odkaz:
https://doaj.org/article/89abf8f7a1ba4667b97abbd1fc780d48
Autor:
A. Trudeau, Anthony H. Gonzalez, K. Thongkham, Kyoung-Soo Lee, Stacey Alberts, M. Brodwin, Thomas Connor, Peter R. M. Eisenhardt, Emily Moravec, Eshwar Puvvada, S. A. Stanford
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 1, p 27 (2024)
The evolution of galaxies depends on their masses and local environments; understanding when and how environmental quenching starts to operate remains a challenge. Furthermore, studies of the high-redshift regime have been limited to massive cluster
Externí odkaz:
https://doaj.org/article/6a4ebb6d7e454eeb87749798b067eb08
Autor:
Young Min Seo, Karen Willacy, Geoffrey Bryden, Dariusz C. Lis, Paul F. Goldsmith, Klaus M. Pontoppidan, Wing-Fai Thi
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 2, p 131 (2024)
We discuss statistical relationships between the mass of protoplanetary disks, the hydrogen deuteride (HD) line flux, and the dust spectral energy distribution (SED) determined using 3000 ProDiMo disk models. The models have 15 free parameters descri
Externí odkaz:
https://doaj.org/article/c34e0e53ee514ad3b7cc2f03e1385c57
Autor:
I-Da Chiang, Karin M. Sandstrom, Jérémy Chastenet, Alberto D. Bolatto, Eric W. Koch, Adam K. Leroy, Jiayi Sun, Yu-Hsuan Teng, Thomas G. Williams
Publikováno v:
The Astrophysical Journal, Vol 964, Iss 1, p 18 (2024)
We measure the CO-to-H _2 conversion factor ( α _CO ) in 37 galaxies at 2 kpc resolution, using the dust surface density inferred from far-infrared emission as a tracer of the gas surface density and assuming a constant dust-to-metal ratio. In total
Externí odkaz:
https://doaj.org/article/aabeec0370d3449086c40f38a930404b
Autor:
William J. Fischer, Cara Battersby, Doug Johnstone, Rachel Lee, Marta Sewiło, Henrik Beuther, Yasuhiro Hasegawa, Adam Ginsburg, Klaus Pontoppidan
Publikováno v:
The Astronomical Journal, Vol 167, Iss 2, p 82 (2024)
Evidence abounds that young stellar objects undergo luminous bursts of intense accretion that are short compared to the time it takes to form a star. It remains unclear how much these events contribute to the main-sequence masses of the stars. We dem
Externí odkaz:
https://doaj.org/article/f59913b74f6f4501ac42df234b8b6513
Autor:
María Emilia De Rossi, Volker Bromm
Publikováno v:
The Astrophysical Journal Letters, Vol 946, Iss 1, p L20 (2023)
By implementing a model of primordial dust emission, we predict dust-continuum fluxes for massive galaxy sources similar to those recently detected by James Webb Space Telescope (JWST) at z ≳ 7. Current upper flux limits, obtained with Atacama Larg
Externí odkaz:
https://doaj.org/article/9f3923fd5e4247a597fb530a54e965ef
Autor:
Jennifer B. Bergner, Yancy L. Shirley, Jes K. Jørgensen, Brett McGuire, Susanne Aalto, Carrie M. Anderson, Gordon Chin, Maryvonne Gerin, Paul Hartogh, Daewook Kim, David Leisawitz, Joan Najita, Kamber R. Schwarz, Alexander G. G. M. Tielens, Christopher K. Walker, David J. Wilner, Edward J. Wollack
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 8 (2022)
Chemistry along the star- and planet-formation sequence regulates how prebiotic building blocks—carriers of the elements CHNOPS—are incorporated into nascent planetesimals and planets. Spectral line observations across the electromagnetic spectru
Externí odkaz:
https://doaj.org/article/d51b8b899af04a7f8f8a1cb73e80ef22
Autor:
Dario Fadda, Sebastian Colditz, Christian Fischer, William D. Vacca, Jason Chu, Melanie Clarke, Randolf Klein, Alfred Krabbe, Robert Minchin, Albrecht Poglitsch
Publikováno v:
The Astronomical Journal, Vol 166, Iss 6, p 237 (2023)
We present the characterization and definitive flux calibration of the Far-infrared Field Integral Line Spectrometer (FIFI-LS) instrument on board SOFIA. The work is based on measurements made in the laboratory with an internal calibrator and on obse
Externí odkaz:
https://doaj.org/article/512de9c2e0d24f5a9724489fd11c1c59
Autor:
Göran Sandell, William Vacca
Publikováno v:
The Astronomical Journal, Vol 166, Iss 6, p 216 (2023)
High-resolution spectra with iSHELL on IRTF in the K and M bands of the young, heavily accreting B1.5Ve star MWC 297 show numerous double-peaked CO lines. These CO lines originate in an inclined gaseous disk in Keplerian rotation. MWC 297 is the only
Externí odkaz:
https://doaj.org/article/897f70bff37d42c7b0eb98b662e6b466
Autor:
A. J. Barger, L. L. Cowie
Publikováno v:
The Astrophysical Journal, Vol 956, Iss 2, p 95 (2023)
We use JWST NIRCam observations of the massive lensing cluster field A2744 to develop a red galaxy selection of f _F444W > 1 μ Jy and f _F444W / f _F150W > 3.5 that picks out all nine >4.5 σ Atacama Large Millimeter/submillimeter Array 1.1 or 1.2 m
Externí odkaz:
https://doaj.org/article/71107761ad54470290d4416ab88d64d5