Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Colleen Gilhuly"'
Autor:
Colleen Gilhuly, Allison Merritt, Roberto Abraham, Shany Danieli, Deborah Lokhorst, Qing Liu, Pieter van Dokkum, Charlie Conroy, Johnny Greco
We present the primary results from the Dragonfly Edge-on Galaxies Survey (DEGS), an exploration of the stellar halos of twelve nearby ($d < 25$ Mpc) edge-on disc galaxies with the Dragonfly Telephoto Array. The edge-on orientation of these galaxies
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::554b221b7d17272dd2366b0efb6bb66d
http://arxiv.org/abs/2204.06596
http://arxiv.org/abs/2204.06596
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:
Monthly Notices of the Royal Astronomical Society. 482:1427-1434
We present tables of velocity dispersions derived from CALIFA V1200 datacubes using Pipe3D. Four different dispersions are extracted from emission (ionized gas) or absorption (stellar) spectra, with two spatial apertures (5'' and 30''). Stellar and i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6929c4bab9bfea7335538276a94ed3e1
https://doi.org/10.1093/mnras/sty2792
https://doi.org/10.1093/mnras/sty2792
Autor:
Qing Liu, Johnny P. Greco, Shany Danieli, Pieter van Dokkum, Charlie Conroy, Allison Merritt, Colleen Gilhuly, Deborah Lokhorst, David Hendel, Roberto Abraham
We present extremely deep imaging of the well-known edge-on galaxy NGC 4565 (the "Needle Galaxy"), observed as part of the Dragonfly Edge-on Galaxies Survey. Our imaging traces starlight over scales of ~100 kpc to surface brightnesses of ~32 mag/arcs
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::50ca80be0293db289e1efa879aa82d87
http://arxiv.org/abs/1910.05358
http://arxiv.org/abs/1910.05358
Autor:
Charlie Conroy, Roberto Abraham, Jiaxuan Li, Allison Merritt, Qing Liu, Pieter G. van Dokkum, Shany Danieli, Deborah Lokhorst, Tim B. Miller, Colleen Gilhuly, Johnny P. Greco
Publikováno v:
The Astrophysical Journal. 909:74
Stellar mass estimates of massive galaxies are susceptible to systematic errors in their photometry, due to their extended light profiles. In this study we use data from the Dragonfly Wide Field Survey (DWFS) to accurately measure the total luminosit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e1fff47d61bd19650809acd171e8e69
https://doi.org/10.3847/1538-4357/abd7f8
https://doi.org/10.3847/1538-4357/abd7f8
Autor:
Lorne Erhardt, Rodney Berg, Luke Lebel, Elizabeth Inrig, Ian Watson, Debora Quayle, Ed Korpach, Chuanlei Liu, Colleen Gilhuly
Publikováno v:
Health Physics. 110:442-457
In 2012, Defence Research and Development Canada led a series of experiments, titled the Full-Scale Radiological Dispersal Device Field Trials, in which short-lived radioactive material was explosively dispersed and the resulting plume and deposition
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5500354dee60b7f54a661534fcf70c19
https://doi.org/10.1097/hp.0000000000000444
https://doi.org/10.1097/hp.0000000000000444
Publikováno v:
Health Physics. 110:471-480
During the Full-Scale Radiological Dispersal Device (FSRDD) Field Trials carried out in Suffield, Alberta, Canada, several suites of detection equipment and software models were used to measure and characterize the ground deposition. The FSRDD Field
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7fe30ac0f065293cad613f54dc0690b5
https://doi.org/10.1097/hp.0000000000000505
https://doi.org/10.1097/hp.0000000000000505
Autor:
Deborah Lokhorst, Pieter van Dokkum, Roberto Abraham, Shany Danieli, Qing Liu, Jiaxuan Li, Colleen Gilhuly, Allison Merritt, Johnny P. Greco
Publikováno v:
Publications of the Astronomical Society of the Pacific. 132:074503
We describe an empirical, self-contained method to isolate faint, large-scale emission in imaging data of low spatial resolution. Multi-resolution filtering (MRF) uses independent data of superior spatial resolution and point source depth to create a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42b0c4afd7725e6a6c9a3291f161315a
https://doi.org/10.1088/1538-3873/ab9416
https://doi.org/10.1088/1538-3873/ab9416
Autor:
Qing Liu, Johnny P. Greco, Steven Janssens, Pieter van Dokkum, Tim B. Miller, Jiaxuan Li, Charlie Conroy, Roberto Abraham, Lamiya Mowla, Shany Danieli, Allison Merritt, Deborah Lokhorst, Colleen Gilhuly, Jielai Zhang
Publikováno v:
The Astrophysical Journal. 894:119
We present a description of the Dragonfly Wide Field Survey (DWFS), a deep photometric survey of a wide area of sky. The DWFS covers 330 $\mathrm{deg}^2$ in the equatorial GAMA fields and the Stripe 82 fields in the SDSS $g$ and $r$ bands. It is carr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::299fec7eadf15aa849b0c364638bcdd6
https://doi.org/10.3847/1538-4357/ab88a8
https://doi.org/10.3847/1538-4357/ab88a8