Zobrazeno 1 - 10
of 233
pro vyhledávání: '"James E Rhoads"'
Publikováno v:
The Astronomical Journal, Vol 167, Iss 4, p 157 (2024)
The slitless grism on the Nancy Grace Roman Space Telescope will enable deep near-infrared spectroscopy over a wide field of view. We demonstrate Roman's capability to detect Ly α galaxies at z > 7 using a multiple position angle (PA) observational
Externí odkaz:
https://doaj.org/article/5bc9e39a90b84906927eb0368ce4698c
Autor:
James E. Rhoads, Isak G. B. Wold, Santosh Harish, Keunho J. Kim, John Pharo, Sangeeta Malhotra, Austen Gabrielpillai, Tianxing Jiang, Huan Yang
Publikováno v:
The Astrophysical Journal Letters, Vol 942, Iss 1, p L14 (2023)
The Early Release Observations (EROs) of JWST beautifully demonstrate the promise of JWST in characterizing the universe at Cosmic Dawn. We analyze the Near Infrared Spectrograph ERO spectra of three z ∼ 8 galaxies to determine their metallicities,
Externí odkaz:
https://doaj.org/article/3be9f4b7a557415d81e7b5c4c7390677
Publikováno v:
The Astrophysical Journal, Vol 956, Iss 1, p 52 (2023)
About 70 luminous quasars discovered at z > 6.5 are strongly biased toward the bright end, thus not providing a comprehensive view of quasar abundance beyond the cosmic dawn. We present the predicted results of the Roman/Rubin high-redshift quasar su
Externí odkaz:
https://doaj.org/article/cfc97ef25c104e0188658ec2debe3e79
Publikováno v:
The Astrophysical Journal, Vol 949, Iss 1, p 3 (2023)
We use large simulations of Ly α emitters with different fractions of ionized intergalactic medium to quantify the clustering of Ly α emitters as measured by the void probability function (VPF), and how it evolves under different ionization scenari
Externí odkaz:
https://doaj.org/article/ba76a37ab4c04064af26939497bf66e1
Autor:
Santosh Harish, Sangeeta Malhotra, James E. Rhoads, Tianxing Jiang, Huan Yang, Kendrick Knorr
Publikováno v:
The Astrophysical Journal, Vol 945, Iss 2, p 157 (2023)
We explore the presence of active galactic nuclei (AGNs)/black holes in Green Pea galaxies (GPs), motivated by the presence of high-ionization emission lines such as He ii and [Ne iii ] in their optical spectra. In order to identify AGN candidates, w
Externí odkaz:
https://doaj.org/article/7e926f1ed1214847a7380298301c5b35
Autor:
L Y Aaron Yung, Rachel S Somerville, Steven L Finkelstein, Peter Behroozi, Romeel Davé, Henry C Ferguson, Jonathan P Gardner, Gergö Popping, Sangeeta Malhotra, Casey Papovich, James E Rhoads, Micaela B Bagley, Michaela Hirschmann, Anton M Koekemoer
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 519:1578-1600
The Nancy Grace Roman Space Telescope, NASA's next flagship observatory, will redefine deep-field galaxy survey with a field of view two orders of magnitude larger than Hubble and an angular resolution of matching quality. These future deep-wide gala
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b487fe40edb6ec64c7125dca25543efa
https://doi.org/10.1093/mnras/stac3595
https://doi.org/10.1093/mnras/stac3595
Publikováno v:
Perez, L A A, Malhotra, S, Rhoads, J E E, Laursen, P & Wold, I G B 2022, ' Probing Patchy Reionization with the Void Probability Function of Ly alpha Emitters ', Astrophysical Journal, vol. 940, no. 2, 102 . https://doi.org/10.3847/1538-4357/ac9b57
We probe what constraints for the global ionized hydrogen fraction the Void Probability Function (VPF) clustering can give for the Lyman-Alpha Galaxies in the Epoch of Reionization (LAGER) narrowband survey as a function of area. Neutral hydrogen act
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::612d5934f66971619d01c0870bb1e2b7
http://arxiv.org/abs/2210.05722
http://arxiv.org/abs/2210.05722
Autor:
Alistair R. Walker, L. F. Barrientos, Isak Wold, Alicia Coughlin, James E. Rhoads, Leopoldo Infante, Ali Ahmad Khostovan, Weida Hu, S. Malhotra, Jun Xian Wang, Zhen-Ya Zheng, F. Valdes, Lucia A. Perez, John Pharo, Santosh Harish, C. Jiang
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 503:5115-5133
The H$\alpha$ equivalent width (EW) is an observational proxy for specific star formation rate (sSFR) and a tracer of episodic star-formation activity. Previous assessments show that EW strongly anti-correlates with stellar mass as $M^{-0.25}$ simila
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e9099a5b34198487678bb705000426fb
https://doi.org/10.1093/mnras/stab778
https://doi.org/10.1093/mnras/stab778
Autor:
Junxian Wang, Santosh Harish, Lucia A. Perez, Alistair R. Walker, Xu Kong, Xianzhong Zheng, Ali Ahmad Khostovan, Leopoldo Infante, Isak Wold, Chunyan Jiang, Alicia Coughlin, Jorge González-López, Weida Hu, John Pharo, Huan Yang, Zhen-Ya Zheng, Gonzalo Prieto, L. Felipe Barrientos, James E. Rhoads, Gaspar Galaz, Wenyong Kang, Pascale Hibon, Francisco Valdes, Sangeeta Malhotra
Publikováno v:
Nature Astronomy. 5:485-490
Protoclusters, the progenitors of the most massive structures in the Universe, have been identified at redshifts of up to 6.6. Besides exploring early structure formation, searching for protoclusters at even higher redshifts is particularly useful to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6ffc388bdf830b1380d3cf6c1eca4527
https://doi.org/10.1038/s41550-020-01291-y
https://doi.org/10.1038/s41550-020-01291-y
Autor:
James E. Rhoads, Isak G. B. Wold, Santosh Harish, Keunho J. Kim, John Pharo, Sangeeta Malhotra, Austen Gabrielpillai, Tianxing Jiang, Huan Yang
The Early Release Observations (EROs) of JWST beautifully demonstrate the promise of JWST in characterizing the universe at cosmic dawn. We analyze the ERO spectra of three $z \sim 8$ galaxies to determine their metallicities, gas temperatures and io
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a804d609668d7d960930de86d735610c