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10 papers · 2 filters
Near-infrared spectroscopy of candidate red supergiant stars in clusters
Maria Messineo, Zhu Qingfeng, Valentin D. Ivanov +5
Clear identifications of Galactic young stellar clusters farther than a few kpc from the Sun are rare, despite the large number of candidate clusters. We aim to improve the selecti…
Massive stars in the giant molecular cloud G23.3-0.3 and W41
Maria Messineo, Karl M. Menten, Donald F. Figer +7
Young massive stars and stellar clusters continuously form in the Galactic disk, generating new HII regions within their natal giant molecular clouds and subsequently enriching the…
Serendipitous Discovery of a Thin Stellar Stream near the Galactic Bulge in the Pan-STARRS1 3Pi Survey
Edouard J. Bernard, Annette M. N. Ferguson, Edward F. Schlafly +22
We report the discovery of a thin stellar stream found in Pan-STARRS1 photometry near the Galactic bulge in the constellation of Ophiuchus. It appears as a coherent structure in th…
Galactic Globular and Open Cluster Fiducial Sequences in the Pan-STARRS1 Photometric System
Edouard J. Bernard, Annette M. N. Ferguson, Edward F. Schlafly +16
We present the fiducial sequences of a sample of Galactic star clusters in the five bands of the Pan-STARRS1 (PS1) photometric system (g_P1, r_P1, i_P1, z_P1, y_P1). These empirica…
Discovery of eight z ~ 6 quasars from Pan-STARRS1
E. Bañados, B. P. Venemans, E. Morganson +24
High-redshift quasars are currently the only probes of the growth of supermassive black holes and potential tracers of structure evolution at early cosmic time. Here we present our…
Stellar Metallicity of the Extended Disk and Distance of the Spiral Galaxy NGC 3621
Rolf-Peter Kudritzki, Miguel A. Urbaneja, Fabio Bresolin +2
Low resolution ESO VLT/FORS spectra of blue supergiant stars are analyzed to determine stellar metallicities (based on elements such as Fe, Ti, Mg) in the extended disk of the spir…