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Showing 10 out of a total of 22 results for community: Saint Mary's Faculty Articles and Other Works. (0.007 seconds)

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New slowly pulsating B stars in the field of the young open cluster NGC 2244 discovered by the MOST photometric satellite

Guenther, David B.; Gruber, D.; Saio, H.; Kuschnig, R.; Fossati, L.; Handler, G.; Zwintz, K.; Weiss, W. W.; Matthews, J. M.; Moffat, A. F. J. (Oxford University Press, 2012-02)
UBV photometry of the open clusters NGC 6604 and NGC 6704

Forbes, Doug; DuPuy, David L. (American Astronomical Society, 1978-03)
New galactic star clusters discovered in the VVV survey. Candidates projected on the inner disk and bulge

Majaess, Daniel J.; Borissova, J.; Chene, A.-N.; Ramirez Alegria, S.; Sharma, S.; Clarke, J. R. A.; Kurtev, R.; Negueruela, I.; Marco, A.; Amigo, P. (EDP Sciences, 2014)
Anchoring the distance scale via X-ray/infrared data for Cepheid clusters: SU Cas

Gallo, Luigi C.; Turner, David Gerald, 1945-; Majaess, Daniel J.; Lane, D. J.; Gieren, W.; Bonatto, C.; Balam, D.; Berdnikov, L. (American Astronomical SocietyIOP Publishing, 2012-07-10)
Sounding open clusters: asteroseismic constraints from Kepler on the properties of NGC 6791 and NGC 6819

Gruberbauer, Michael; Basu, Sarbani; Grundahl, Frank; Stello, Dennis; Kallinger, T.; Hekker, Saskia; Mosser, Benoit; Garcia, Rafael A.; Mathur, Savita; Brogaard, Karsten (American Astronomical Society, 2011-03-01)
Asteroseismic analysis of the pre-main-sequence stars in NGC 2264

Guenther, David B.; Kallinger, T.; Zwintz, K.; Weiss, W. W.; Kuschnig, R.; Casey, M. P.; Matthews, J. M.; Moffat, A. F. J.; Rucinski, S. M.; Sasselov, D.; Walker, G. A. H. (American Astronomical Society, 2009-10-20)
[gamma] Doradus pulsation in two pre-main sequence stars discovered by CoRoT

Zwintz, K.; Fossati, L.; Ryabchikova, T.; Kaiser, A.; Gruberbauer, Michael; Barnes, T. G.; Baglin, A.; Chaintreuil, S. (EDP Sciences, 2013-02)
The distance to the young open cluster Westerlund 2

Carraro, G.; Turner, David Gerald, 1945-; Majaess, Daniel J.; Baume, G. (EDP Sciences, 2013-07)
A new X-ray, UBVRIc, and JHKs study of the young cluster Westerlund 2 was undertaken to resolve discrepancies tied to the cluster’s distance. Existing spectroscopic observations for bright cluster members and new multi-band photometry imply a reddening relation toward Westerlund 2 described by EU−B/EB−V = 0.63 + 0.02 EB−V . Variable-extinction analyses for Westerlund 2 and nearby IC 2581 based upon spectroscopic distance moduli and ZAMS fitting yield values of RV = AV/EB−V = 3.88±0.18 and 3.77±0.19, respectively, and confirm prior assertions that anomalous interstellar extinction is widespread throughout Carina. The results were confirmed by applying the color-difference method to UBVRIcJHKs data for 19 spectroscopically observed cluster members, yielding RV = 3.85 ± 0.07. The derived distance to Westerlund 2 of d = 2.85 ± 0.43 kpc places the cluster on the far side of the Carina spiral arm. The cluster’s age is no more than τ &sim; 2 × 106 yr as inferred from the cluster’s brightest stars and an X-ray (Chandra) cleaned analysis of its pre-main-sequence demographic. Four Wolf-Rayet stars in the cluster core and surrounding corona (WR20a, WR20b, WR20c, and WR20aa) are very likely cluster members, and their inferred luminosities are consistent with those of other late-WN stars in open clusters. The color–magnitude diagram for Westerlund 2 also displays a gap at spectral type B0.5 V with associated color spread at higher and lower absolute magnitudes that might be linked to close binary mergers. These features, in conjunction with the evidence for mass loss from the WR stars, may help to explain the high flux of γ-rays, cosmic rays, and X-rays from the direction toward Westerlund 2....
The ages of the disk clusters NGC 188, M67, and NGC 752, using improved opacities and cluster membership data

Guenther, David B.; Dinescu, Dana I.; Demarque, Pierre; Pinsonneault, M. H. (American Astronomical Society, 1995-05)
Investigating potential planetary nebula/cluster pairs

Moni Bidin, C.; Majaess, Daniel J.; Bonatto, C.; Mauro, F.; Turner, David Gerald, 1945-; Geisler, D.; Chene, A. -N.; Gormaz-Matamala, A. C.; Borissova, J.; Kurtev, R. G. (EDP Sciences, 2014-01)