Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Seery Chen"'
Autor:
Zili Shen, William P. Bowman, Pieter van Dokkum, Roberto G. Abraham, Imad Pasha, Michael A. Keim, Qing Liu, Deborah M. Lokhorst, Steven R. Janssens, Seery Chen
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 75 (2024)
The Dragonfly Telephoto Array employs a unique design to detect very large and diffuse galaxies that might be missed with conventional telescopes. The Dragonfly Ultrawide Survey (DFUWS) is a new wide-field survey that will cover 10,000 deg ^2 of the
Externí odkaz:
https://doaj.org/article/bae226625eee4d109b98c4cf3ea366a2
Autor:
Qing Liu, Roberto Abraham, Peter G. Martin, William P. Bowman, Pieter van Dokkum, Steven R. Janssens, Seery Chen, Michael A. Keim, Deborah Lokhorst, Imad Pasha, Zili Shen, Jielai Zhang
Publikováno v:
The Astrophysical Journal, Vol 953, Iss 1, p 7 (2023)
Unbiased sky background modeling is crucial for the analysis of deep wide-field images, but it remains a major challenge in low surface brightness astronomy. Traditional image processing algorithms are often designed to produce artificially flat back
Externí odkaz:
https://doaj.org/article/f15ecfe346b44ef1a696537daed4899f
Autor:
Seery Chen, Deborah M. Lokhorst, Jeff Shen, Imad Pasha, Eugene Malakhov, Roberto Abraham, Pieter van Dokkum
The Dragonfly Spectral Line Mapper (DSLM) is the latest evolution of the Dragonfly Telephoto Array, which turns it into the world's most powerful wide-field spectral line imager. The DSLM will be the equivalent of a 1.6m aperture $f$/0.26 refractor w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb23c2d2ee9253d8be9d49f951cf9f08
http://arxiv.org/abs/2209.07489
http://arxiv.org/abs/2209.07489
Autor:
Deborah M. Lokhorst, Seery Chen, Imad Pasha, Jeff Shen, Evgeni Malakhov, Roberto Abraham, Pieter van Dokkum
The pathfinder Dragonfly Spectral Line Mapper is a distributed aperture telescope based off of the Dragonfly Telephoto Array with additional instrumentation (the Dragonfly "Filter-Tilter") to enable ultranarrow bandpass imaging. The pathfinder is com
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c8bd8ff6b376df2423f6c22032c82a46
Autor:
Imad Pasha, Deborah Lokhorst, Pieter G. van Dokkum, Seery Chen, Roberto Abraham, Johnny Greco, Shany Danieli, Tim Miller, Erin Lippitt, Ava Polzin, Zili Shen, Michael A. Keim, Qing Liu, Allison Merritt, Jielai Zhang
We identify a $\sim$600 pc-wide region of active star formation located within a tidal streamer of M82 via $H\alpha$ emission ($F_{H\alpha}\sim 6.5\times10^{-14}$ erg s$^{-1}$ cm$^{-2}$), using a pathfinder instrument based on the Dragonfly Telephoto
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e204e86a7ae169eea4efbefec7d2abb
http://arxiv.org/abs/2112.07052
http://arxiv.org/abs/2112.07052
Autor:
Michael A. Keim, Pieter van Dokkum, Shany Danieli, Deborah Lokhorst, Jiaxuan Li, Zili Shen, Roberto Abraham, Seery Chen, Colleen Gilhuly, Qing Liu, Allison Merritt, Tim B. Miller, Imad Pasha, Ava Polzin
Publikováno v:
The Astrophysical Journal. 935:160
Two ultra diffuse galaxies in the same group, NGC1052-DF2 and NGC1052-DF4, have been found to have little or no dark matter and to host unusually luminous globular cluster populations. Such low mass diffuse objects in a group environment are easily d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::374dd5b649fbd9f4978c40caece95ede
https://doi.org/10.3847/1538-4357/ac7dab
https://doi.org/10.3847/1538-4357/ac7dab
Autor:
Qing Liu, Roberto Abraham, Colleen Gilhuly, Pieter van Dokkum, Peter G. Martin, Jiaxuan Li, Johnny P. Greco, Deborah Lokhorst, Seery Chen, Shany Danieli, Michael A. Keim, Allison Merritt, Tim B. Miller, Imad Pasha, Ava Polzin, Zili Shen, Jielai Zhang
Uncertainty in the wide-angle Point Spread Function (PSF) at large angles (tens of arcseconds and beyond) is one of the dominant sources of error in a number of important quantities in observational astronomy. Examples include the stellar mass and sh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::134675f790afd5f6fb33cf1bd12cbe34
Publikováno v:
Ground-based and Airborne Telescopes VIII.
We describe plans for adding a wide-field narrow-band imaging capability to the Dragon y Telephoto Array. Our plans focus on the development of the ‘Dragon y Filter-Tilter', a device which places ultra-narrow bandpass interference filters (Δλ ≈
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c0cd90e4ddc303f4fa111e8a7733891
https://doi.org/10.1117/12.2561162
https://doi.org/10.1117/12.2561162
Autor:
Deborah Lokhorst, Roberto Abraham, Imad Pasha, Pieter van Dokkum, Seery Chen, Tim Miller, Shany Danieli, Johnny Greco, Jielai Zhang, Allison Merritt, Charlie Conroy
Publikováno v:
The Astrophysical Journal. 927:136
We present the discovery of a giant cloud of ionized gas in the field of the starbursting galaxy M82. Emission from the cloud is seen in H$\alpha$ and [NII]$\lambda$6583 in data obtained though a small pathfinder instrument used to test the key ideas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e8d3f0e64aadd0de64e7f6bd410a47eb
https://doi.org/10.3847/1538-4357/ac50b6
https://doi.org/10.3847/1538-4357/ac50b6
Using parallaxes from Gaia DR2, we estimate the distance to the globular clusters 47 Tuc and NGC 362, taking advantage of the background stars in the Small Magellanic Cloud and quasars to account for various parallax systematics. We found the paralla
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::874e567df25e7397b846dc54962c0dc1