Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Ryan L. Sanders"'
Autor:
Prerak Garg, Desika Narayanan, Ryan L. Sanders, Romeel Davé, Gergö Popping, Alice E. Shapley, Daniel P. Stark, Jonathan R. Trump
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 1, p 113 (2024)
The ratios of strong rest-frame optical emission lines are the dominant indicators of metallicities in high-redshift galaxies. Since typical strong-line-based metallicity indicators are calibrated on auroral lines at z = 0, their applicability for ga
Externí odkaz:
https://doaj.org/article/5469de3ebb044c1d8a07978ded0dbb18
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 1, p 24 (2024)
We report detections of the [O iii ] λ 4364 auroral emission line for 16 galaxies at z = 2.1–8.7, measured from JWST/NIRSpec observations obtained as part of the Cosmic Evolution Early Release Science (CEERS) survey program. We combine this CEERS
Externí odkaz:
https://doaj.org/article/84ae4116774f49e9b0a20bb86fbb598b
Publikováno v:
The Astrophysical Journal Letters, Vol 950, Iss 1, p L1 (2023)
We analyze the rest-optical emission-line ratios of star-forming galaxies at 2.7 ≤ z < 6.5 drawn from the Cosmic Evolution Early Release Science (CEERS) Survey and their relationships with stellar mass ( M _* ). Our analysis includes both line rati
Externí odkaz:
https://doaj.org/article/6797f9f1f80b4604a85166a233b7ea38
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
Autor:
Leonardo Clarke, Alice Shapley, Ryan L. Sanders, Michael W. Topping, Tucker Jones, Mariska Kriek, Naveen A. Reddy, Daniel P. Stark, Mengtao Tang
Publikováno v:
The Astrophysical Journal, Vol 957, Iss 2, p 81 (2023)
Using deep near-infrared Keck/MOSFIRE observations, we analyze the rest-optical spectra of eight star-forming galaxies in the COSMOS and GOODS-N fields. We reach integration times of ∼10 hr in the deepest bands, pushing the limits on current ground
Externí odkaz:
https://doaj.org/article/c8b1b2ffab034f08a5fd4a66df54dfc8
Publikováno v:
The Astrophysical Journal, Vol 955, Iss 1, p 54 (2023)
We utilize medium-resolution JWST/NIRSpec observations of 164 galaxies at z = 2.0–9.3 from the Cosmic Evolution Early Release Science (CEERS) survey to investigate the evolution of the excitation and ionization properties of galaxies at high redshi
Externí odkaz:
https://doaj.org/article/16ca249b49df4769a22afda71a335b6d
Publikováno v:
The Astrophysical Journal, Vol 954, Iss 2, p 157 (2023)
We present an analysis of the star formation rates (SFRs) and dust attenuation properties of star-forming galaxies at 2.7 ≤ z < 6.5 drawn from the Cosmic Evolution Early Release Science Survey. Our analysis is based on JWST/NIRSpec Micro-Shutter As
Externí odkaz:
https://doaj.org/article/582d5def0ba64e0295d0a9043314242a
Autor:
Naveen A. Reddy, Ryan L. Sanders, Alice E. Shapley, Michael W. Topping, Mariska Kriek, Alison L. Coil, Bahram Mobasher, Brian Siana, Saeed Rezaee
Publikováno v:
The Astrophysical Journal, Vol 951, Iss 1, p 56 (2023)
We use the large spectroscopic data set of the MOSFIRE Deep Evolution Field survey to investigate some of the key factors responsible for the elevated ionization parameters ( U ) inferred for high-redshift galaxies, focusing in particular on the role
Externí odkaz:
https://doaj.org/article/ee321d5d942440a4ab52bc1674bb24cb
Publikováno v:
The Astrophysical Journal, Vol 952, Iss 2, p 167 (2023)
We examine the factors responsible for the variation in the ionization parameter ( U ) of high-redshift star-forming galaxies based on medium-resolution JWST/NIRSpec observations obtained by the Cosmic Evolution Early Release Science survey. The samp
Externí odkaz:
https://doaj.org/article/dbda623e1b61442aa98352186215da89
Autor:
Brian Lorenz, Mariska Kriek, Alice E. Shapley, Naveen A. Reddy, Ryan L. Sanders, Guillermo Barro, Alison L. Coil, Bahram Mobasher, Sedona H. Price, Jordan N. Runco, Irene Shivaei, Brian Siana, Daniel R. Weisz
Publikováno v:
The Astrophysical Journal, Vol 951, Iss 1, p 29 (2023)
We investigate dust attenuation and its dependence on viewing angle for 308 star-forming galaxies at 1.3 ≤ z ≤ 2.6 from the MOSFIRE Deep Evolution Field survey. We divide galaxies with a detected H α emission line and coverage of H β into eight
Externí odkaz:
https://doaj.org/article/5b5719e90ece4532b22eb4659d78cd2a