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5 results on '"E. W. Peng"'

1. A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE)

Author

A. Boselli, M. Fossati, A. Longobardi, K. Kianfar, N. Z. Dametto, P. Amram, J. P. Anderson, P. Andreani, S. Boissier, M. Boquien, V. Buat, G. Consolandi, L. Cortese, P. Côté, J. C. Cuillandre, L. Ferrarese, L. Galbany, G. Gavazzi, S. Gwyn, G. Hensler, J. Hutchings, E. W. Peng, J. Postma, J. Roediger, Y. Roehlly, P. Serra, G. Trinchieri, Boselli, A, Fossati, M, Longobardi, A, Kianfar, K, Dametto, N, Amram, P, Anderson, J, Andreani, P, Boissier, S, Boquien, M, Buat, V, Consolandi, G, Cortese, L, Cote, P, Cuillandre, J, Ferrarese, L, Galbany, L, Gavazzi, G, Gwyn, S, Hensler, G, Hutchings, J, Peng, E, Postma, J, Roediger, J, Roehlly, Y, Serra, P, Trinchieri, G, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB), Dipartimento di Fisica e Astronomia 'Galileo Galilei', Università degli Studi di Padova = University of Padua (Unipd), Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), National Research Council of Canada (NRC), University of Vienna [Vienna], Forschungszentrum Jülich GmbH | Centre de recherche de Juliers, Helmholtz-Gemeinschaft = Helmholtz Association, NRC Herzberg Astronomy and Astrophysics, Conseil National de Recherches Canada (CNRC), INAF - Osservatorio Astronomico di Cagliari (OAC), Istituto Nazionale di Astrofisica (INAF), and INAF - Osservatorio Astronomico di Brera (OAB)

Subjects
Physics, [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], galaxies: elliptical and lenticular CD, FOS: Physical sciences, Galaxies: evolution, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Tracing, Galaxies: clusters: individual: Virgo, Astrophysics - Astrophysics of Galaxies, Galaxies: elliptical and lenticular, cD, Galaxies: ISM, Space and Planetary Science, Galaxies: interaction, Astrophysics of Galaxies (astro-ph.GA), galaxies: interactions, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Galaxies: clusters: general, Lenticular galaxy, Astrophysics::Galaxy Astrophysics
Abstract

As part of the VESTIGE survey, a blind narrow-band Ha+[NII] imaging survey of the Virgo cluster carried out with MegaCam at the CFHT, we discovered 8 massive lenticular galaxies with prominent ionised gas emission features in their inner (few kpc) regions. These features are either ionised gas filaments similar to those observed in cooling flows (2 gal), or thin discs with sizes 0.7, Comment: Accepted for publication on A&A

Published
2022

2. A fast radio burst source at a complex magnetised site in a barred galaxy

Author

W. W. Zhu, Y. K. Zhang, E. W. Peng, X. F. Wu, Yu-Xuan Zhu, Q. B. Yi, Y. X. Huang, P. L. Wang, W. Y. Wang, A. V. Filippenko, S. Xiao, J. H. Sun, Shuang-Nan Zhang, H. Fu, Shaolin Xiong, Y. Feng, Y. P. Men, C. Cai, M. Z. Chen, A. Stockton, A. Esamdin, J. C. Jiang, B. Wang, W. F. Yu, D. Z. Li, H. Q. Gan, P. Guhathakurta, Z. Y. Liu, B. Y. Zhang, W. X. Peng, Bing Zhang, Z. X. Li, S. Dong, P. Jiang, X. Q. Li, Jiaheng Zou, L. F. Hao, J. Yang, C. H. Niu, C. F. Zhang, Youling Yue, T. G. Brink, H. Xu, W. Lu, J. R. Niu, S. B. Zhang, D. Li, K. J. Lee, S. G. Djorgovski, L. M. Song, D. J. Yu, J. L. Han, H. B. Li, R. Luo, L. Qian, R. Yao, D. Stern, Y. Zhao, J. P. Yuan, Y. P. Yang, Yufeng Li, W. K. Zheng, J. W. Xu, Y. H. Xu, R. X. Xu, P. Chen, N. Wang, M. Z. Wang, R. N. Caballero, C. K. Li, F. Wang, D. J. Zhou, Z. G. Dai, and Xuan Yang

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Multidisciplinary, Fast radio burst, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Magnetar, Galaxy, Redshift, Radio telescope, Barred spiral galaxy, Astrophysics - High Energy Astrophysical Phenomena, Stellar density, Astrophysics::Galaxy Astrophysics, Radio wave
Abstract

Fast radio bursts (FRBs) are highly dispersed millisecond-duration radio bursts. Recent observations of a Galactic FRB suggest that at least some FRBs originate from magnetars, but the origin of cosmological FRBs is still not settled. Here we report the detection of 1863 bursts in 82 hr over 54 days from the repeating source FRB~20201124A. These observations show irregular short-time variation of the Faraday rotation measure (RM), which probes the density-weighted line-of-sight magnetic field strength, of individual bursts during the first 36 days, followed by a constant RM. We detected circular polarisation in more than half of the burst sample, including one burst reaching a high fractional circular polarisation of 75%. Oscillations in fractional linear and circular polarisations as well as polarisation angle as a function of wavelength were detected. All of these features provide evidence for a complicated, dynamically evolving, magnetised immediate environment within about an astronomical unit (au; Earth-Sun distance) of the source. Our optical observations of its Milky-Way-sized, metal-rich host galaxy reveal a barred spiral, with the FRB source residing in a low stellar density, interarm region at an intermediate galactocentric distance. This environment is inconsistent with a young magnetar engine formed during an extreme explosion of a massive star that resulted in a long gamma-ray burst or superluminous supernova., Comment: 28 pages, 10 figures, updated to match the published version

Published
2021

3. Author Correction: A fast radio burst source at a complex magnetized site in a barred galaxy

Author

H. Xu, J. R. Niu, P. Chen, K. J. Lee, W. W. Zhu, S. Dong, B. Zhang, J. C. Jiang, B. J. Wang, J. W. Xu, C. F. Zhang, H. Fu, A. V. Filippenko, E. W. Peng, D. J. Zhou, Y. K. Zhang, P. Wang, Y. Feng, Y. Li, T. G. Brink, D. Z. Li, W. Lu, Y. P. Yang, R. N. Caballero, C. Cai, M. Z. Chen, Z. G. Dai, S. G. Djorgovski, A. Esamdin, H. Q. Gan, P. Guhathakurta, J. L. Han, L. F. Hao, Y. X. Huang, P. Jiang, C. K. Li, D. Li, H. Li, X. Q. Li, Z. X. Li, Z. Y. Liu, R. Luo, Y. P. Men, C. H. Niu, W. X. Peng, L. Qian, L. M. Song, D. Stern, A. Stockton, J. H. Sun, F. Y. Wang, M. Wang, N. Wang, W. Y. Wang, X. F. Wu, S. Xiao, S. L. Xiong, Y. H. Xu, R. X. Xu, J. Yang, X. Yang, R. Yao, Q. B. Yi, Y. L. Yue, D. J. Yu, W. F. Yu, J. P. Yuan, B. B. Zhang, S. B. Zhang, S. N. Zhang, Y. Zhao, W. K. Zheng, Y. Zhu, and J. H. Zou

Subjects
Multidisciplinary
Published
2022

4. A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE)

Author

null Junais, S. Boissier, A. Boselli, L. Ferrarese, P. Côté, S. Gwyn, J. Roediger, S. Lim, E. W. Peng, J.-C. Cuillandre, A. Longobardi, M. Fossati, G. Hensler, J. Koda, J. Bautista, M. Boquien, K. Małek, P. Amram, Y. Roehlly, Junais, Boissier, S, Boselli, A, Ferrarese, L, Cote, P, Gwyn, S, Roediger, J, Lim, S, Peng, E, Cuillandre, J, Longobardi, A, Fossati, M, Hensler, G, Koda, J, Bautista, J, Boquien, M, Maaek, K, Amram, P, Roehlly, Y, Laboratoire d'Astrophysique de Marseille (LAM), and Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Galaxies: star formation, [SDU]Sciences of the Universe [physics], Galaxies: interaction, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, Galaxies: evolution, Astronomy and Astrophysics, Galaxies: clusters: general, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Galaxies: clusters: individual: Virgo, Astrophysics - Astrophysics of Galaxies
Abstract

Low-surface-brightness galaxies (LSBs) contribute to a significant fraction of all the galaxies in the Universe. Ultra-diffuse galaxies (UDGs) form a subclass of LSBs that has attracted a lot of attention in recent years (although its definition may vary between studies). Although UDGs are found in large numbers in galaxy clusters, groups, and in the field, their formation and evolution are still very much debated. Using a comprehensive set of multiwavelength data from the NGVS (optical), VESTIGE (H$\alpha$ narrowband), and GUViCS (UV) surveys, we studied a sample of 64 diffuse galaxies and UDGs in the Virgo cluster to investigate their formation history. We analyzed the photometric colors and surface-brightness profiles of these galaxies and then compared them to models of galaxy evolution, including ram-pressure stripping (RPS) events to infer any possible strong interactions with the hot cluster gas in the past. While our sample consists mainly of red LSBs, which is typical in cluster environments, we found evidence of a color variation with the cluster-centric distance. Blue, HI-bearing, star-forming diffuse galaxies are found at larger distances from the cluster center than the rest of the sample. The comparison of our models with multifrequency observations suggests that most of the galaxies of the sample might have undergone a strong RPS event in their lifetime, on average 1.6 Gyr ago (with a large dispersion, and RPS still ongoing for some of them). This process resulted in the transformation of initially gas-rich diffuse blue galaxies into gas-poor and red ones that form the dominant population now, the more extreme UDGs having undergone the process in a more distant past on average. The RPS in dense environments could be one of the major mechanisms for the formation of the large number of quiescent UDGs we observe in galaxy clusters., Comment: 57 pages, 14 Figures, accepted for publication in A&A

Published
2022

5. A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE)

Author

A. Boselli, A. Lupi, B. Epinat, P. Amram, M. Fossati, J. P. Anderson, S. Boissier, M. Boquien, G. Consolandi, P. Côté, J. C. Cuillandre, L. Ferrarese, L. Galbany, G. Gavazzi, J. A. Gómez-López, S. Gwyn, G. Hensler, J. Hutchings, H. Kuncarayakti, A. Longobardi, E. W. Peng, H. Plana, J. Postma, J. Roediger, Y. Roehlly, C. Schimd, G. Trinchieri, B. Vollmer

Published
2021
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