Zobrazeno 1 - 10
of 904
pro vyhledávání: '"luminosities"'
Autor:
Hai Fu
Publikováno v:
The Astrophysical Journal Letters, Vol 963, Iss 1, p L19 (2024)
I employ the Lucy rectification algorithm to recover the inclination-corrected distribution of local disk galaxies in the plane of absolute magnitude ( M _i ) and H i velocity width ( W _20 ). By considering the inclination angle as a random variable
Externí odkaz:
https://doaj.org/article/6c056eb37fb24ea9b418f28ebff75b0c
Autor:
Karolina Garcia, Desika Narayanan, Gergö Popping, R. Anirudh, Sagan Sutherland, Melanie Kaasinen
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 2, p 197 (2024)
We present slick (the Scalable Line Intensity Computation Kit), a software package that calculates realistic CO, [C i ], and [C ii ] luminosities for clouds and galaxies formed in hydrodynamic simulations. Built on the radiative transfer code despoti
Externí odkaz:
https://doaj.org/article/a2595cf3524c4a60842a94bf538528eb
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 2, p 146 (2024)
We explore the cosmic evolution of the fraction of dust-obscured star formation predicted by the simba cosmological hydrodynamic simulations featuring an on-the-fly model for dust formation, evolution, and destruction. We find that up to z = 3, our r
Externí odkaz:
https://doaj.org/article/2a7d7f34c89a4cea9e7247489b1106e1
Autor:
Brian C. Lacki
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 2, p 183 (2024)
The search for extraterrestrial intelligence includes efforts to constrain populations of artificial broadcasts in other galaxies. Previous efforts use individualist methods, searching for single broadcasts with high signal-to-noise ratio. These woul
Externí odkaz:
https://doaj.org/article/a00489ae002e46da836a075655954593
Publikováno v:
The Astrophysical Journal, Vol 959, Iss 2, p 102 (2023)
Characterizing the physical properties of cool supergiants allows us to probe the final stages of a massive star’s evolution before it undergoes core collapse. Despite their importance, the fundamental properties of these stars— $\mathrm{log}{T}_
Externí odkaz:
https://doaj.org/article/4581757fc59440568ae457b24f35907e
Autor:
Marco Martorano, Arjen van der Wel, Eric F. Bell, Marijn Franx, Katherine E. Whitaker, Angelos Nersesian, Sedona H. Price, Maarten Baes, Katherine A. Suess, Erica J. Nelson, Tim B. Miller, Rachel Bezanson, Gabriel Brammer
Publikováno v:
The Astrophysical Journal, Vol 957, Iss 1, p 46 (2023)
We examine the wavelength dependence of radial light profiles based on Sérsic index n measurements of 1067 galaxies with M _* ≥ 10 ^9.5 M _⊙ and in the redshift range 0.5 < z < 3. The sample and rest-frame optical light profiles are drawn from t
Externí odkaz:
https://doaj.org/article/78ad33eae10742dd98ccc1bddf92b279
Autor:
Thomas Ayres
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 266, Iss 1, p 6 (2023)
The Wilson–Bappu effect (WBE) is a remarkable correlation between the width of the chromospheric emission core of the Ca ii 3934 Å K line and stellar absolute visual magnitude over an astonishing range, from diminutive red dwarfs to bloated yellow
Externí odkaz:
https://doaj.org/article/3482a9917ac044659237e9cdb40a5a77
Publikováno v:
The Astronomical Journal, Vol 165, Iss 3, p 108 (2023)
The determination of the astrophysical properties of stars remains challenging and frequently relies on the application of stellar models. Stellar sequences in nearby open clusters provide some of the best means to test and calibrate stellar evolutio
Externí odkaz:
https://doaj.org/article/7519006d755544a0841587bd29b549ff
Autor:
Elbaz, David, Cesarsky, Catherine J.
Publikováno v:
Science, 2003 Apr 01. 300(5617), 270-274.
Externí odkaz:
https://www.jstor.org/stable/3834135
Publikováno v:
Science, 2003 Mar 01. 299(5612), 1552-1555.
Externí odkaz:
https://www.jstor.org/stable/3833759