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Red Supergiant Stars as Cosmic Abundance Probes. III. NLTE effects in J-band Magnesium lines
Maria Bergemann, Rolf-Peter Kudritzki, Zach Gazak +2
Non-LTE calculations for Mg I in red supergiant stellar atmospheres are presented to investigate the importance of non-LTE for the formation of Mg I lines in the NIR J-band. Recent…
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…
Wide, Cool and Ultracool Companions to Nearby Stars from Pan-STARRS1
Niall R. Deacon, Michael C. Liu, Eugene A. Magnier +18
We present the discovery of 61 wide (>5 arcsecond) separation, low-mass (stellar and substellar) companions to stars in the solar neighborhood identified from Pan-STARRS\,1 (PS1) d…
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…