Zobrazeno 1 - 10
of 63
pro vyhledávání: '"Bernard J. McNamara"'
Autor:
Michael S. Kirk, Jason Jackiewicz, Bernard J. McNamara, R. T. J. McAteer, Krishnan Balasubramaniam
Publikováno v:
Solar Physics. 283:97-111
We present a new automated algorithm to identify, track, and characterize small-scale brightening associated with solar eruptive phenomena observed in H{\alpha}. The temporal spatially-localized changes in chromospheric intensities can be separated i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::04b0ef0a8b6c750510fde67fa2c18777
https://doi.org/10.1007/s11207-011-9843-1
https://doi.org/10.1007/s11207-011-9843-1
Autor:
Reba M. Bandyopadhyay, Thomas E. Harrison, Stefanie Wachter, Bernard J. McNamara, Michael P. Rupen, Jillian Bornak
Publikováno v:
The Astrophysical Journal. 701:L110-L113
The low mass X-ray binary and Z source GX 17+2 undergoes infrared K-band brightening episodes of at least 3.5 magnitudes. The source of these episodes is not known. Prior published K-band magnitudes and new K-band measurements acquired between 2006 a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3c5f27cc8b98eb07c323dbfa0c3b7ffd
https://doi.org/10.1088/0004-637x/701/2/l110
https://doi.org/10.1088/0004-637x/701/2/l110
Publikováno v:
The Astronomical Journal. 138:466-477
We have identified 4659 variable objects in the Northern Sky Variability Survey. We have classified each of these objects into one of the five variable star classes: (1) Algol/β Lyr systems including semidetached, and detached eclipsing binaries, (2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c700ba70c5cdda1558dcb29f831d6d09
https://doi.org/10.1088/0004-6256/138/2/466
https://doi.org/10.1088/0004-6256/138/2/466
Autor:
D. I. Hoffman, G. E. Taylor, Jeffrey L. Coughlin, Bernard J. McNamara, T. E. Harrison, W. T. Vestrand, Jon A. Holtzman
Publikováno v:
The Astronomical Journal. 136:1067-1078
We have classified 409 objects in the Northern Sky Variability Survey (NSVS) as new β Lyrae or Algol-type eclipsing binaries. These candidates have outside of eclipse magnitudes of ~10-13. Through automated Fourier analysis routines and some manual
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7900eb6aace091e2281e23f4dc20cbf8
https://doi.org/10.1088/0004-6256/136/3/1067
https://doi.org/10.1088/0004-6256/136/3/1067
Publikováno v:
The Astronomical Journal. 133:394-402
The Hubble Space Telescope Fine Guidance Sensors data on 23 stars in the intermediate-age cluster M35 having B - V 6 AU, secondary masses between 0.3 and 0.6 M⊙, and mass ratios of about 0.2. This latter value is in agreement with capture models em
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eea32a0ca415d79011aa670e970afd2f
https://doi.org/10.1086/509804
https://doi.org/10.1086/509804
Autor:
W. T. Vestrand, Bernard J. McNamara, T. Barker, Jon A. Holtzman, Thomas E. Harrison, D. I. Hoffman
Publikováno v:
The Astronomical Journal. 132:2260-2267
Many eclipsing binary star systems show long-term variations in their orbital periods, evident in their O - C (observed minus calculated period) diagrams. With data from the Robotic Optical Transient Search Experiment (ROTSE-I) compiled in the SkyDOT
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b442b1b7f6d4b4c813ca1c232453954
https://doi.org/10.1086/508411
https://doi.org/10.1086/508411
Publikováno v:
The Astrophysical Journal. 623:1070-1075
The emission from low-mass X-ray binaries (LMXBs) arises from the accretion of mass onto a neutron star or black hole. A knowledge of the amount of mass being accreted as well as changes in this value are therefore essential inputs into models of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5019a64d0607e7907902380e0fc27c97
https://doi.org/10.1086/428640
https://doi.org/10.1086/428640
Publikováno v:
The Astrophysical Journal. 602:264-270
Newly determined high-precision relative proper motions determined from the Hubble Space Telescope Wide Field Planetary Camera 2 are used along with radial velocity measurements to determine the dynamical distance to the globular cluster M15. A compa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b95cc321ab2769688f4f7cf18482d489
https://doi.org/10.1086/380905
https://doi.org/10.1086/380905
Publikováno v:
The Astrophysical Journal. 595:187-194
We present the results of an internal proper motion analysis of the inner region of M15 using Hubble Space Telescope Wide Field Planetary Camera 2 images. The motions of 704 stars with brightnesses above that of the cluster turnoff (V < 18.3) are ana
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::efd1c5af88d785f1d9dc71be88bb3efe
https://doi.org/10.1086/377341
https://doi.org/10.1086/377341
Publikováno v:
The Astronomical Journal. 120:2649-2660
We compare the parallaxes of three dwarf novae obtained using the Fine Guidance Sensors on the Hubble Space Telescope with their ground-based infrared spectroscopic parallaxes to examine the nature of their secondary stars. We have used new optical s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::604a414a82ca071815630430b622b056
https://doi.org/10.1086/316802
https://doi.org/10.1086/316802