Results 21 to 30 of about 324,439 (295)

Evidence for a Massive Andromeda Galaxy Using Satellite Galaxy Proper Motions

The Astrophysical Journal, 2023
We present new mass estimates for Andromeda (M31) using the orbital angular momenta of four satellite galaxies (M33, NGC 185, NGC 147, and IC 10) derived from existing proper motions, distances, and line-of-sight velocities. We infer two masses for M31: $
Ekta Patel, Kaisey S. Mandel
doaj   +1 more source

Quasar Proper Motions and Low-Frequency Gravitational Waves [PDF]

, 1996
We report observational upper limits on the mass-energy of the cosmological gravitational-wave background, from limits on proper motions of quasars. Gravitational waves with periods longer than the time span of observations produce a simple pattern of ...
Backer D. C., Bertotti B., Bondi H., Carl R. Gwinn, Demetrios N. Matsakis, Hogan C. J., Linder E. V., Mark Birkinshaw, Mathews J., T. Marshall Eubanks, Ted Pyne   +10 more
core   +3 more sources

Orbits of LMC/SMC with recent ground-based proper motions

EPJ Web of Conferences, 2012
In recent years, with new ground-based and HST measurements of proper motions of the Magellanic Clouds being published, a need of a reanalysis of possible orbital history has arisen.
Růžička A., Jungwiert B., Bartošková K., Costa E.   +3 more
doaj   +1 more source

A 1500 deg2 near infrared proper motion catalogue from the UKIDSS Large Area Survey [PDF]

, 2013
The United Kingdom Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS) began in 2005, with the start of the UKIDSS programme as a 7 year effort to survey roughly 4000 deg2 at high Galactic latitudes in Y, J, H and K bands.
A. H. Andrei, Abad, Abell, Andrei, Andrei, B. Burningham, Bakos, Becklin, Burgasser, Burgasser, Burgasser, Burningham, Burningham, Burningham, Casali, Casali, Casewell, Catalán, Collins, Cruz, Cruz, D. J. Pinfield, Day-Jones, Deacon, Deacon, Deacon, Dierickx, Dupuy, Dye, Epchtein, Faherty, Faherty, Feast, Finlator, Goldman, Gomes, Greenstein, H. R. A. Jones, Hambly, Hansen, Hawley, Hewett, Høg, Kharchenko, Kilic, Kilic, Kilic, Kirkpatrick, Kirkpatrick, Kirkpatrick, Kirkpatrick, Kirkpatrick, Kirkpatrick, Kirkpatrick, Knapp, Latham, Lawrence, Leggett, Leggett, Leggett, Leggett, Leigh Smith, Looper, Luyten, Luyten, Lépine, Lépine, Marocco, Mason, Meng, Munn, Murray, P. W. Lucas, Pinfield, Pinfield, Pinfield, R. L. Smart, Reid, Reid, Reid, Roeser, S. Catalán, Salim, Sayres, Schilbach, Scholz, Sheppard, Skrutskie, Smith, Taylor, Taylor, Vick, Warren, West, West, Zhang, Zhang   +96 more
core   +3 more sources

Proper Motions of Water Masers in W49 N Measured by KaVA

The Astrophysical Journal, 2023
We report the proper motions of 22 GHz water masers toward W49 N that were observed by the KVN and VERA Array (KaVA) during 2017 February–May. We found 263, 268, and 310 features in three successive epochs; they were distributed in a region of size 4 × 4
Kitiyanee Asanok, Malcolm D. Gray, Tomoya Hirota, Koichiro Sugiyama, Montree Phetra, Busaba H. Kramer, Tie Liu, Kee-Tae Kim, Bannawit Pimpanuwat   +8 more
doaj   +1 more source

Proper Motions in the Andromeda Subgroup

, 2007
This article presents results of VLBI observations of regions of H2O maser activity in the Local Group galaxies M33 and IC10. Since all position measurements were made relative to extragalactic background sources, the proper motions of the two galaxies ...
A. Brunthaler, A. Brunthaler, A. Loeb, A.S. Kulessa, E. Corbelli, E.M. Wilcots, N.W. Evans, S. Piatek   +7 more
core   +1 more source

Cross-Identification of Stars with Unknown Proper Motions [PDF]

, 2010
The cross-identification of sources in separate catalogs is one of the most basic tasks in observational astronomy. It is, however, surprisingly difficult and generally ill-defined.
Adelman-McCarthy, Alexander S. Szalay, Andrew J. Connolly, Bienaymé, Budavári, Chareton, Gyöngyi Kerekes, István Csabai, Munn, Ojha, Tamás Budavári, York   +11 more
core   +2 more sources

Massive Hypervelocity Runaway Stars in the Large Magellanic Cloud

The Astrophysical Journal, 2023
Since the hypervelocity stars were discovered in the Milky Way, various mechanisms have been proposed to explain these runaway stars. Up to now, however, the dominant ejected mechanism of hypervelocity stars is still unclear.
Zehao Lin, Ye Xu, Chaojie Hao, Yingjie Li, Dejian Liu, Shuaibo Bian   +5 more
doaj   +1 more source

JWST-TST Proper Motions. I. High-precision NIRISS Calibration and Large Magellanic Cloud Kinematics

The Astrophysical Journal, 2023
We develop and disseminate effective point-spread functions and geometric-distortion solutions for high-precision astrometry and photometry with the JWST NIRISS instrument. We correct field dependencies and detector effects, and assess the
Mattia Libralato, Andrea Bellini, Roeland P. van der Marel, Jay Anderson, Sangmo Tony Sohn, Laura L. Watkins, Lili Alderson, Natalie Allen, Mark Clampin, Ana Glidden, Jayesh Goyal, Kielan Hoch, Jingcheng Huang, Jens Kammerer, Nikole K. Lewis, Zifan Lin, Douglas Long, Dana Louie, Ryan J. MacDonald, Matt Mountain, Maria Peña-Guerrero, Marshall D. Perrin, Laurent Pueyo, Isabel Rebollido, Emily Rickman, Sara Seager, Kevin B. Stevenson, Jeff A. Valenti, Daniel Valentine, Hannah R. Wakeford   +29 more
doaj   +1 more source

Fixing the Reference Frame for PPMXL Proper Motions Using Extragalactic Sources [PDF]

, 2014
We quantify and correct systematic errors in PPMXL proper motions using extragalactic sources from the first two LAMOST data releases and the Veron-Cetty & Veron Catalog of Quasars.
Beers, Timothy C., Carlin, Jeffrey L., Chen, Li, Deng, Li-Cai, Grabowski, Kathleen, Grillmair, Carl J., Guhathakurta, Puragra, Hou, Jin-Liang, Hou, Yong-Hui, Liu, Chao, Liu, Xiao-Wei, Luo, A-Li, Lépine, Sébastien, Newberg, Heidi Jo, Smith, Martin C., Yanny, Brian, Zhang, Hao-Tong, Zhang, Yong, Zheng, Zheng   +18 more
core   +2 more sources