Zobrazeno 1 - 10
of 153
pro vyhledávání: '"Near infrared astronomy"'
Publikováno v:
The Astrophysical Journal Letters, Vol 968, Iss 2, p L16 (2024)
Reverberation mapping accurately determines virial black hole masses only for redshifts z < 0.2 by utilizing the relationship between the H β broad-line region (BLR) size and the 5100 Å continuum luminosity established with ∼200 active galactic n
Externí odkaz:
https://doaj.org/article/3d4954a73ef04a9a8812a84390af0812
Autor:
Hermine Landt
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 10 (2023)
Recent models for the inner structure of active galactic nuclei (AGN) aim at connecting the outer region of the accretion disk with the broad-line region and dusty torus through a radiatively accelerated, dusty outflow. Such an outflow not only requi
Externí odkaz:
https://doaj.org/article/c03790f2886044c38fd756e7baa63464
Autor:
Anthony Pahl, Alice Shapley, Charles C. Steidel, Naveen A. Reddy, Yuguang Chen, Gwen C. Rudie
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 2, p 212 (2024)
While the shape of the Ly α profile is viewed as one of the best tracers of ionizing-photon escape fraction ( f _esc ) within low-redshift ( z ∼ 0.3) surveys of the Lyman continuum, this connection remains untested at high redshift. Here, we combi
Externí odkaz:
https://doaj.org/article/4f181610f16940c5bf47442b5c8ef762
Autor:
Zoë Haggard, Andrea M. Ghez, Shoko Sakai, Abhimat K. Gautam, Tuan Do, Jessica R. Lu, Matthew Hosek, Mark R. Morris, Sean Granados
Publikováno v:
The Astronomical Journal, Vol 168, Iss 4, p 166 (2024)
The Milky Way’s central parsec is a highly extinguished region with a population of high-proper-motion stars. We have tracked 145 stars for ∼10 yr at wavelengths between 1 and 4 μ m to analyze extinction effects in color–magnitude space. Appro
Externí odkaz:
https://doaj.org/article/cccc2731d1d14140b9c7338e1a02e8a9
Autor:
Edypo Melo, Diogo Souto, Katia Cunha, Verne V. Smith, Fábio Wanderley, Vinicius Grilo, Deusalete Camara, Kely Murta, Neda Hejazi, Ian J. M. Crossfield, Johanna Teske, Rafael Luque, Michael Zhang, Jacob Bean
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 2, p 90 (2024)
Exoplanets hosting M dwarfs are the best targets to characterize Earth-like or super-Earth planetary atmospheres with the James Webb Space Telescope (JWST). We determine detailed stellar parameters ( T _eff , log g , and ξ ) and individual abundance
Externí odkaz:
https://doaj.org/article/1113be45acd349f4a2a2498ed7769cce
Autor:
David J. Setton, Gourav Khullar, Tim B. Miller, Rachel Bezanson, Jenny E. Greene, Katherine A. Suess, Katherine E. Whitaker, Jacqueline Antwi-Danso, Hakim Atek, Gabriel Brammer, Sam E. Cutler, Pratika Dayal, Robert Feldmann, Seiji Fujimoto, Lukas J. Furtak, Karl Glazebrook, Andy D. Goulding, Vasily Kokorev, Ivo Labbe, Joel Leja, Yilun Ma, Danilo Marchesini, Themiya Nanayakkara, Richard Pan, Sedona H. Price, Jared C. Siegel, Heath Shipley, John R. Weaver, Pieter van Dokkum, Bingjie Wang, Christina C. Williams
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 1, p 145 (2024)
We report the spectroscopic confirmation of a massive ( $\mathrm{log}({M}_{\star }/{M}_{\odot })=10.34{\pm }_{0.07}^{0.06}$ ), Hubble Space Telescope–dark ( m _F150W − m _F444W = 3.6) quiescent galaxy at z _spec = 3.97 in the UNCOVER survey. NIRS
Externí odkaz:
https://doaj.org/article/fa16a9d497d44ced8f69071746880f67
Autor:
Samantha G. Morrison, Ryder H. Strauss, David E. Trilling, Andy J. López-Oquendo, Justice Bruursema, Frederick J. Vrba
Publikováno v:
The Astronomical Journal, Vol 168, Iss 4, p 180 (2024)
The UKIRT Hemisphere Survey covers the northern sky in the infrared from 0° to 60° decl. Current data releases include both J and K bands, with H -band data forthcoming. Here, we present a novel pipeline to recover asteroids from this survey data.
Externí odkaz:
https://doaj.org/article/28a855bad6fc4560990520e27d3babcb
Autor:
Samuel A. Beiler, Michael C. Cushing, J. Davy Kirkpatrick, Adam C. Schneider, Sagnick Mukherjee, Mark S. Marley, Federico Marocco, Richard L. Smart
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 2, p 107 (2024)
We present infrared spectral energy distributions of 23 late-type T and Y dwarfs obtained with the James Webb Space Telescope. The spectral energy distributions consist of NIRSpec PRISM and MIRI low-resolution spectrometer spectra covering the ∼1
Externí odkaz:
https://doaj.org/article/829333f0540a475abb81440ee05a0404
Autor:
Samuel A. Beiler, Sagnick Mukherjee, Michael C. Cushing, J. Davy Kirkpatrick, Adam C. Schneider, Harshil Kothari, Mark S. Marley, Channon Visscher
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 1, p 60 (2024)
The sensitivity and spectral coverage of JWST are enabling us to test our assumptions of ultracool dwarf atmospheric chemistry, especially with regards to the abundances of phosphine (PH _3 ) and carbon dioxide (CO _2 ). In this paper, we use Near In
Externí odkaz:
https://doaj.org/article/c537be0018654b908fc0a10a568db3b3
Autor:
Vineet Rawat, M. R. Samal, D. K. Ojha, Brajesh Kumar, Saurabh Sharma, J. Jose, Ram Sagar, R. K. Yadav
Publikováno v:
The Astronomical Journal, Vol 168, Iss 3, p 136 (2024)
We present a detailed near-infrared study of an embedded cluster located in the hub of the giant molecular cloud G148.24+00.41 of mass ∼10 ^5 M _⊙ , with the TANSPEC instrument mounted on the 3.6 m Devasthal Optical Telescope. The hub is located
Externí odkaz:
https://doaj.org/article/e3686de6d3b74e0b8502b3c519d20dbd