Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Douglas W. Shields"'
Autor:
Julia Kennefick, Erik B. Monson, Ryan Miller, Daniel Kennefick, Shameer Abdeen, Douglas W. Shields, Benjamin L. Davis
The spiral arms spanning disk galaxies are believed to be created by density waves that propagate through galactic disks. We present a novel method of finding the co-rotation radius where the spiral arm pattern speed matches the velocities of the sta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::49ca944b657903785bf69a3898aa94a6
Autor:
Benjamin L. Davis, Ryan Miller, Julia Kennefick, Daniel Kennefick, Rafael T. Eufrasio, Mohamed Shameer Abdeen, Douglas W Shields, Erik B. Monson
The density-wave theory of spiral structure proposes that star formation occurs in or near a spiral-shaped region of higher density that rotates rigidly within the galactic disk at a fixed pattern speed. In most interpretations of this theory, newbor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f1bb81c8e8aa221d8a84df43055f155
http://arxiv.org/abs/1907.09390
http://arxiv.org/abs/1907.09390
Autor:
Daniel Kennefick, Benjamin L. Davis, Mohamed Shameer Abdeen, Julia Kennefick, Douglas W. Shields, Hamed Pour-Imani
The density-wave theory of galactic spiral-arm structure makes a striking prediction that the pitch angle of spiral arms should vary with the wavelength of the galaxy's image. The reason is that stars are born in the density wave but move out of it a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6391f82e0457c3ab248bbdc6ff2f26b5
http://arxiv.org/abs/1608.00969
http://arxiv.org/abs/1608.00969
Autor:
Douglas W. Shields, Thomas P. K. Martinsson, Julia Kennefick, Kyle B. Westfall, Daniel Kennefick, Benjamin L. Davis, Matthew Hartley, Joel C. Berrier, Rob A. Swaters, Russell Flatman
Publikováno v:
The Astrophysical Journal, 802:L13. IOP PUBLISHING LTD
Davis, B L, Kennefick, D, Kennefick, J, Westfall, K B, Shields, D W, Flatman, R, Hartley, M T, Berrier, J C, Martinsson, T P K & Swaters, R A 2015, ' A fundamental plane of spiral structure in disk galaxies ', Astrophysical Journal Letters, vol. 802, no. 1, L13 . https://doi.org/10.1088/2041-8205/802/1/L13
Davis, B L, Kennefick, D, Kennefick, J, Westfall, K B, Shields, D W, Flatman, R, Hartley, M T, Berrier, J C, Martinsson, T P K & Swaters, R A 2015, ' A fundamental plane of spiral structure in disk galaxies ', Astrophysical Journal Letters, vol. 802, no. 1, L13 . https://doi.org/10.1088/2041-8205/802/1/L13
Spiral structure is the most distinctive feature of disk galaxies and yet debate persists about which theory of spiral structure is the correct one. Many versions of the density wave theory demand that the pitch angle is uniquely determined by the di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ae8e1ed71551436bbda92736e51a1e38
http://arxiv.org/abs/1503.03070
http://arxiv.org/abs/1503.03070
Autor:
Julia Kennefick, Daniel Kennefick, Benjamin L. Davis, Claud H. Sandberg Lacy, Marc S. Seigar, Douglas W. Shields, Lucas Johns, Matthew Hartley, Joel C. Berrier
Publikováno v:
Publons
We present our determination of the nuclear supermassive black hole (SMBH) mass function for spiral galaxies in the Local Universe, established from a volume-limited sample consisting of a statistically complete collection of the brightest spiral gal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::52f7d3bb076331806fbee4c3f06da7a4
Autor:
Ivanio Puerari, Marc S. Seigar, Douglas W. Shields, Benjamin L. Davis, Claud H. Sandberg Lacy, Julia Kennefick, Daniel Kennefick, Joel C. Berrier
A logarithmic spiral is a prominent feature appearing in a majority of observed galaxies. This feature has long been associated with the traditional Hubble classification scheme, but historical quotes of pitch angle of spiral galaxies have been almos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3883fad0f03bc547e149974ee2051d32
Autor:
Douglas W. Shields, J. Adam Hughes, Scott R. Barrows, Ben Davis, Daniel Kennefick, Julia Kennefick, William Ring, Marc Seigar, Daniel J. Whalen, Volker Bromm, Naoki Yoshida
Publikováno v:
AIP Conference Proceedings.
In order to address the “cosmic downsizing problem,” or the underpopulation of highly massive quasars in the current epoch, the Arkansas Galaxy Evolution Survey is exploring a correlation, the M‐P relation, between the pitch angle of a galaxy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::beba6c9e12883c528e2255bbe2c58a52
https://doi.org/10.1063/1.3518878
https://doi.org/10.1063/1.3518878
Autor:
Ryan Miller, Daniel Kennefick, Julia Kennefick, Mohamed Shameer Abdeen, Erik Monson, Rafael T Eufrasio, Douglas W Shields, Benjamin L Davis
Publikováno v:
Astrophysical Journal; Apr2019, Vol. 874 Issue 2, p1-1, 1p
Autor:
Hamed Pour-Imani, Daniel Kennefick, Julia Kennefick, Benjamin L. Davis, Douglas W. Shields, Mohamed Shameer Abdeen
Publikováno v:
Astrophysical Journal Letters; 8/10/2016, Vol. 827 Issue 1, p1-1, 1p
Autor:
Benjamin L. Davis, Daniel Kennefick, Julia Kennefick, Kyle B. Westfall, Douglas W. Shields, Russell Flatman, Matthew T. Hartley, Joel C. Berrier, Thomas P. K. Martinsson, Rob A. Swaters
Publikováno v:
Astrophysical Journal Letters; 3/20/2015, Vol. 802 Issue 1, p1-1, 1p