☆ 4.7 Article

The nature of luminous Ly alpha emitters at z similar to 2-3: maximal dust-poor starbursts and highly ionizing AGN

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2018)

获取全文
添加到收藏夹

期刊

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 477, 期 2, 页码 2817-2840

出版社

OXFORD UNIV PRESS
DOI: 10.1093/mnras/sty782

关键词

galaxies: active; galaxies: evolution; galaxies: high-redshift; galaxies: ISM; galaxies: starburst; cosmology: observations

类别

Astronomy & Astrophysics

资金

  1. Netherlands Organization for Scientific research (NWO) through a Veni fellowship
  2. Lancaster University [A100679]
  3. Huygens PhD fellowship from Leiden University
  4. NASA through the Astrophysics Data Analysis Program (ADAP) [NNX12AE20G]
  5. National Science Foundation [1716907]
  6. ERC Advanced Grant DUSTYGAL [321334]
  7. STFC [ST/P000541/1, ST/M001229/1]
  8. Royal Society/Wolfson Merit Award
  9. William Herschel Telescope [W16AN004]
  10. Very Large Telescope Programs [098.A-0819, 099.A-0254]
  11. Keck II telescope program [C267D]
  12. ESO Telescopes at the La Silla Paranal Observatory under ESO programme [098.A-0819, 099.A-0254, 294.A-5018, 294.A-5039, 092.A-0786, 093.A-0561, 097.A-0943, 179.A-2005]
  13. [SW2014b20]
  14. STFC [ST/P00038X/1, ST/R000972/1, ST/R000514/1] Funding Source: UKRI

向作者/读者索取更多资源

Protocol

社区支持

Reagent

社区支持

Deep narrow-band surveys have revealed a large population of faint Ly alpha emitters (LAEs) in the distant Universe, but relatively little is known about the most luminous sources (L-Ly alpha greater than or similar to 10(42.7) erg s(-1); L-Ly alpha greater than or similar to L-Ly alpha(*)). Here we present the spectroscopic follow-up of 21 luminous LAEs at z similar to 2-3 found with panoramic narrow-band surveys over five independent extragalactic fields (approximate to 4 x 10(6) Mpc(3) surveyed at z similar to 2.2 and z similar to 3.1). We use WHT/ISIS, Keck/DEIMOS, and VLT/X-SHOOTER to study these sources using high ionization UV lines. Luminous LAEs at z similar to 2-3 have blue UV slopes (beta = -2.0(-0.1)(+0.3)) and high Ly a escape fractions (50(-15)(+20) per cent) and span five orders of magnitude in UV luminosity (M-UV approximate to -19 to -24). Many (70 per cent) show at least one high ionization rest-frame UV line such as C-IV, N-V, C-III], He-II or O-III], typically blue-shifted by approximate to 100-200 km s(-1) relative to Ly alpha. Their Ly alpha profiles reveal a wide variety of shapes, including significant blue-shifted components and widths from 200 to 4000 km s(-1). Overall, 60 +/- 11 per cent appear to be active galactic nucleus (AGN) dominated, and at L-Ly alpha > 10(43.3) erg s(-1) and/or M-UV < -21.5 virtually all LAEs are AGNs with high ionization parameters (logU = 0.6 +/- 0.5) and with metallicities of approximate to 0.5 -1 Z(circle dot). Those lacking signatures of AGNs (40 +/- 11 per cent) have lower ionization parameters (logU = -3.0(-0.9)(+1.6) and log xi(ion) = 25.4 +/- 0.2) and are apparently metal-poor sources likely powered by young, dust-poor 'maximal' starbursts. Our results show that luminous LAEs at z similar to 2-3 are a diverse population and that 2 x L-Ly alpha(*) and 2 x M-UV(*) mark a sharp transition in the nature of LAEs, from star formation dominated to AGN dominated.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

Article Astronomy & Astrophysics

The LEGA-C of Nature and Nurture in Stellar Populations at z ∼ 0.6-1.0: D n 4000 and Hδ Reveal Different Assembly Histories for Quiescent Galaxies in Different Environments

David Sobral, Arjen van der Wel, Rachel Bezanson, Eric Bell, Adam Muzzin, Francesco D'Eugenio, Behnam Darvish, Anna Gallazzi, Po-Feng Wu, Michael Maseda, Jorryt Matthee, Ana Paulino-Afonso, Caroline Straatman, Pieter G. van Dokkum

Summary: Galaxy evolution is influenced by various physical processes, and their rates differ for different dark matter haloes and environments. By using absorption-line spectroscopy, this study examines the impact of environment and stellar mass on galaxy stellar populations in the COSMOS field at around z~0.6-1. The findings indicate that the characteristics of stellar populations, such as D(n)4000 and H delta equivalent widths, not only depend on stellar mass but also on the environment.

ASTROPHYSICAL JOURNAL (2022)

添加到收藏夹
Article Astronomy & Astrophysics

The synchrony of production and escape: half the bright Lyα emitters at z ≈ 2 have Lyman continuum escape fractions ≈50 per cent

Rohan P. Naidu, Jorryt Matthee, Pascal A. Oesch, Charlie Conroy, David Sobral, Gabriele Pezzulli, Matthew Hayes, Dawn Erb, Ricardo Amorin, Max Gronke, Daniel Schaerer, Sandro Tacchella, Josephine Kerutt, Ana Paulino-Afonso, Joao Calhau, Mario Llerena, Huub Rottgering

Summary: The ionizing photon escape fraction is a significant unknown factor in reionization research. By inferring the escape fraction using Lyα profiles, this study identifies distinct differences between LyC leakers and non-leakers. The leakers exhibit extreme equivalent widths and high ionization rates, suggesting a close relationship between these characteristics and photon escape.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2022)

添加到收藏夹
Article Astronomy & Astrophysics

LEGA-C: Analysis of Dynamical Masses from Ionized Gas and Stellar Kinematics at z ∼ 0.8

Caroline M. S. Straatman, Arjen van der Wel, Josha van Houdt, Rachel Bezanson, Eric F. Bell, Pieter van Dokkum, Francesco D'Eugenio, Marijn Franx, Anna Gallazzi, Anna de Graaff, Michael Maseda, Sharon E. Meidt, Adam Muzzin, David Sobral, Po-Feng Wu

Summary: This paper compares dynamical mass estimates based on stellar and ionized gas kinematics of 157 star-forming galaxies at different redshifts. The results show that within the half-light radius, the dynamical mass of the ionized gas is lower than that of the stars, indicating that the motion of ionized gas in galaxies is not predominantly driven by disruptive events such as outflows caused by star formation.

ASTROPHYSICAL JOURNAL (2022)

添加到收藏夹
Article Astronomy & Astrophysics

An ALMA Spectroscopic Survey of the Brightest Submillimeter Galaxies in the SCUBA-2-COSMOS Field (AS2COSPEC): Survey Description and First Results

Chian-Chou Chen, Cheng-Lin Liao, Ian Smail, A. M. Swinbank, Y. Ao, A. J. Bunker, S. C. Chapman, B. Hatsukade, R. J. Ivison, Minju M. Lee, Stephen Serjeant, Hideki Umehata, Wei-Hao Wang, Y. Zhao

Summary: This study presents the results of an ALMA band 3 spectroscopic survey targeting the brightest submillimeter galaxies (SMGs) in the COSMOS field. The observations reveal the redshifts and merger events of these galaxies, suggesting their role in star formation. The data also show that a large proportion of the primary SMGs have double Gaussian emission lines, consistent with the mass-sigma correlation found in local early-type galaxies. Additionally, the study provides insights into the number density and potential progenitors of massive quiescent galaxies.

ASTROPHYSICAL JOURNAL (2022)

添加到收藏夹
Article Astronomy & Astrophysics

(Re)Solving reionization with Lyα: how bright Lyα Emitters account for the z ≈ 2-8 cosmic ionizing background

Jorryt Matthee, Rohan P. Naidu, Gabriele Pezzulli, Max Gronke, David Sobral, Pascal A. Oesch, Matthew Hayes, Dawn Erb, Daniel Schaerer, Ricardo Amorin, Sandro Tacchella, Ana Paulino-Afonso, Mario Llerena, Joao Calhau, Huub Rottgering

Summary: This study introduces an emissivity framework based on Ly alpha emitters (LAEs), which reveals the contribution of quasars and LAEs to the ionizing background. The study also infers the ionization process of LAEs at different redshifts.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2022)

添加到收藏夹
Article Astronomy & Astrophysics

The LEGA-C and SAMI galaxy surveys: quiescent stellar populations and the mass-size plane across 6 Gyr

Tania M. Barone, Francesco D'Eugenio, Nicholas Scott, Matthew Colless, Sam P. Vaughan, Arjen van der Wel, Amelia Fraser-McKelvie, Anna de Graaff, Jesse van de Sande, Po-Feng Wu, Rachel Bezanson, Sarah Brough, Eric Bell, Scott M. Croom, Luca Cortese, Simon Driver, Anna R. Gallazzi, Adam Muzzin, David Sobral, Joss Bland-Hawthorn, Julia J. Bryant, Michael Goodwin, Jon S. Lawrence, Nuria P. F. Lorente, Matt S. Owers

Summary: The study reveals a close correlation between metallicity and the proxy for gravitational potential or escape velocity, while no correlation is found between age and surface density. The results suggest that galaxies formed more compactly at higher redshifts and remained compact throughout their evolution. Additionally, galaxies seem to quench at a characteristic surface density that decreases with decreasing redshift.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2022)

添加到收藏夹
Article Astronomy & Astrophysics

ALMA Lensing Cluster Survey: ALMA-Herschel Joint Study of Lensed Dusty Star-forming Galaxies across z ≃ 0.5-6

Fengwu Sun, Eiichi Egami, Seiji Fujimoto, Timothy Rawle, Franz E. Bauer, Kotaro Kohno, Ian Smail, Pablo G. Perez-Gonzalez, Yiping Ao, Scott C. Chapman, Francoise Combes, Miroslava Dessauges-Zavadsky, Daniel Espada, Jorge Gonzalez-Lopez, Anton M. Koekemoer, Vasily Kokorev, Minju M. Lee, Kana Morokuma-Matsui, Alejandra M. Munoz Arancibia, Masamune Oguri, Roser Pello, Yoshihiro Ueda, Ryosuke Uematsu, Francesco Valentino, Paul van der Werf, Gregory L. Walth, Michael Zemcov, Adi Zitrin

Summary: This study presents a joint analysis of sources detected by the ALMA Lensing Cluster Survey (ALCS) using both ALMA and Herschel data. The results provide insights into the physical properties and redshift distribution of these sources, showing an increasing fraction of galaxies at redshifts around 1-2 among fainter millimeter sources.

ASTROPHYSICAL JOURNAL (2022)

添加到收藏夹
Article Astronomy & Astrophysics

JWST Sneaks a Peek at the Stellar Morphology of z ∼ 2 Submillimeter Galaxies: Bulge Formation at Cosmic Noon

Chian-Chou Chen, Zhen-Kai Gao, Qi-Ning Hsu, Cheng-Lin Liao, Yu-Han Ling, Ching-Min Lo, Ian Smail, Wei-Hao Wang, Yu-Jan Wang

Summary: Morphological analyses of seven submillimeter galaxies at z similar to 2 reveal compact reddened stellar structures with evidence of spiral arms and bars, suggesting dynamical interactions. The sizes of these structures are significantly smaller at longer wavelengths, contradicting recent theoretical predictions.

ASTROPHYSICAL JOURNAL LETTERS (2022)

添加到收藏夹
Article Astronomy & Astrophysics

ALMACAL IX: Multiband ALMA survey for dusty star-forming galaxies and the resolved fractions of the cosmic infrared background

Jianhang Chen, R. J. Ivison, Martin A. Zwaan, Ian Smail, Anne Klitsch, Celine Peroux, Gergo Popping, Andrew D. Biggs, Roland Szakacs, Aleksandra Hamanowicz, Claudia Lagos

Summary: The ALMACAL project has used the calibration data from the Atacama Large Millimetre/submillimetre Array (ALMA) to map the lines of sight towards and beyond the ALMA calibrators. With over 1000 hours of integration, ALMACAL has detected 186 faint, dusty, star-forming galaxies (DSFGs) and provided benchmark data for models of galaxy formation and evolution. ALMA has resolved about half of the cosmic infrared background in the submm/mm regime.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2023)

添加到收藏夹
Article Astronomy & Astrophysics

JWST PEARLS. Prime Extragalactic Areas for Reionization and Lensing Science: Project Overview and First Results

Rogier A. Windhorst, Seth H. Cohen, Rolf A. Jansen, Jake Summers, Scott Tompkins, Christopher J. Conselice, Simon P. Driver, Haojing Yan, Dan Coe, Brenda Frye, Norman Grogin, Anton Koekemoer, Madeline A. Marshall, Rosalia O'Brien, Nor Pirzkal, Aaron Robotham, Russell E. Ryan, Christopher N. A. Willmer, Timothy Carleton, Jose M. Diego, William C. Keel, Paolo Porto, Caleb Redshaw, Sydney Scheller, Stephen M. Wilkins, S. P. Willner, Adi Zitrin, Nathan J. Adams, Duncan Austin, Richard G. Arendt, John F. Beacom, Rachana A. Bhatawdekar, Larry D. Bradley, Tom Broadhurst, Cheng Cheng, Francesca Civano, Liang Dai, Herve Dole, Jordan C. J. D'Silva, Kenneth J. Duncan, Giovanni G. Fazio, Giovanni Ferrami, Leonardo Ferreira, Steven L. Finkelstein, Lukas J. Furtak, Hansung B. Gim, Alex Griffiths, Heidi B. Hammel, Kevin C. Harrington, Nimish P. Hathi, Benne W. Holwerda, Rachel Honor, Jia-Sheng Huang, Minhee Hyun, Myungshin Im, Bhavin A. Joshi, Patrick S. Kamieneski, Patrick Kelly, Rebecca L. Larson, Juno Li, Jeremy Lim, Zhiyuan Ma, Peter Maksym, Giorgio Manzoni, Ashish Kumar Meena, Stefanie N. Milam, Mario Nonino, Massimo Pascale, Andreea Petric, Justin D. R. Pierel, Maria del Carmen Polletta, Huub J. A. Roettgering, Michael J. Rutkowski, Ian Smail, Amber N. Straughn, Louis-Gregory Strolger, Andi Swirbul, James A. A. Trussler, Lifan Wang, Brian Welch, J. Stuart B. Wyithe, Min Yun, Erik Zackrisson, Jiashuo Zhang, Xiurui Zhao

Summary: This paper provides an overview and details the rationale, methods, and initial findings of the PEARLS project, which utilizes NIRCam images to survey extragalactic areas. The project aims to study galaxy assembly, AGN growth, and First Light, and is expected to contribute significant insights to the field of astronomy.

ASTRONOMICAL JOURNAL (2023)

添加到收藏夹
Article Astronomy & Astrophysics

An Ultra-deep Multiband Very Large Array (VLA) Survey of the Faint Radio Sky (COSMOS-XS): New Constraints on the Cosmic Star Formation History

D. van der Vlugt, J. A. Hodge, H. S. B. Algera, I Smail, S. K. Leslie, J. F. Radcliffe, D. A. Riechers, H. Rottgering

Summary: Using ultra-deep 3 GHz observations, we inferred the radio luminosity functions (LFs) of star-forming galaxies and discovered a strong redshift trend and density evolution. Comparing with observed far-infrared and ultraviolet LFs, we found an underestimation of the UV LF at high redshifts. By calculating the cosmic star formation rate density using the radio LFs, we found that the rate rises up to around z=1.8 and then declines rapidly.

ASTROPHYSICAL JOURNAL (2022)

添加到收藏夹
Article Astronomy & Astrophysics

JWST's PEARLS: A JWST/NIRCam View of ALMA Sources

Cheng Cheng, Jia-Sheng Huang, Ian Smail, Haojing Yan, Seth H. Cohen, Rolf A. Jansen, Rogier A. Windhorst, Zhiyuan Ma, Anton Koekemoer, Christopher N. A. Willmer, S. P. Willner, Jose M. Diego, Brenda Frye, Christopher J. Conselice, Leonardo Ferreira, Andreea Petric, Min Yun, Hansung B. Gim, Maria del Carmen Polletta, Kenneth J. Duncan, Benne W. Holwerda, Huub J. A. Rottgering, Rachel Honor, Nimish P. Hathi, Patrick S. Kamieneski, Nathan J. Adams, Dan Coe, Tom Broadhurst, Jake Summers, Scott Tompkins, Simon P. Driver, Norman A. Grogin, Madeline A. Marshall, Nor Pirzkal, Aaron Robotham, Russell E. Ryan

Summary: We present new observations from the James Webb Space Telescope/NIRCam of (sub)millimeter sources detected by ALMA. We identified their NIRCam counterparts and found that they represent 16 distinct galaxies in three fields. The photometric redshifts and stellar masses of these sources are similar to previously studied submillimeter galaxies. The deep NIRCam data revealed that the majority of these sources are disk-like with little disturbance, suggesting that secular growth may play a role in their assembly.

ASTROPHYSICAL JOURNAL LETTERS (2023)

添加到收藏夹
Article Astronomy & Astrophysics

The JCMT SCUBA-2 Survey of the James Webb Space Telescope North Ecliptic Pole Time-Domain Field

Minhee Hyun, Myungshin Im, Ian R. Smail, William D. Cotton, Jack E. Birkin, Satoshi Kikuta, Hyunjin Shim, Christopher N. A. Willmer, James J. Condon, Rogier A. Windhorst, Seth H. Cohen, Rolf A. Jansen, Chun Ly, Yuichi Matsuda, Giovanni G. Fazio, A. M. Swinbank, Haojing Yan

Summary: The James Webb Space Telescope Time-Domain Field (JWST-TDF) is a field near the North Ecliptic Pole that will be observed by the JWST. The study describes the imaging and cataloging of submillimeter and radio sources in the JWST-TDF to aid in the study of dust-obscured galaxies. The results show that these galaxies have high star formation rates and large cool gas masses, suggesting a key factor necessary for their high star formation rates.

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES (2023)

添加到收藏夹
Article Astronomy & Astrophysics

Improving machine learning-derived photometric redshifts and physical property estimates using unlabelled observations

A. Humphrey, P. A. C. Cunha, A. Paulino-Afonso, S. Amarantidis, R. Carvajal, J. M. Gomes, I Matute, P. Papaderos

Summary: In the era of huge astronomical surveys, machine learning provides promising solutions for efficient estimation of galaxy properties. The traditional supervised paradigm involves training a model on labeled data and using it to predict labels of unlabelled data. The semi-supervised pseudo-labelling technique offers an alternative by allowing the model to learn from both labelled and unlabelled data. Testing this method on redshift, stellar mass, and star formation rate estimation, significant improvements are obtained compared to purely supervised learning, especially using gradient-boosting tree methods.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2023)

添加到收藏夹
Article Astronomy & Astrophysics

VLA Legacy Survey of Molecular Gas in Massive Star-forming Galaxies at High Redshift

Marta Frias Castillo, Jacqueline Hodge, Matus Rybak, Paul van der Werf, Ian Smail, Jack E. Birkin, Chian-Chou Chen, Scott C. Chapman, Ryley Hill, Claudia del P. Lagos, Cheng-Lin Liao, Elisabete da Cunha, Gabriela Calistro Rivera, Jianhang Chen, E. F. Jimenez-Andrade, Eric J. Murphy, Douglas Scott, A. M. Swinbank, Fabian Walter, R. J. Ivison, Helmut Dannerbauer

Summary: We present the initial results of a survey targeting the CO(J = 1-0) transition in submillimeter-selected star-forming galaxies at high redshift. Out of the 30 galaxies observed, we detect CO(1-0) emission in 11 targets, with three tentative detections. The total molecular gas masses, gas mass fractions, and depletion times of our sources are in good agreement with predictions from the SHARK semi-analytical model.

ASTROPHYSICAL JOURNAL (2023)

添加到收藏夹
暂无数据
研讨会 海报 问题 讨论圈 基金 期刊 论文 科研社交 资讯集成 审稿人 关于我们 常见问题 移动App 隐私条款 使用条款
© Peeref 2019-2024. All rights reserved.