495 citations
- Association of Universities for Research in AstronomyUS10 papers
- Cerro Tololo Inter-American ObservatoryCL8 papers
- Kitt Peak National ObservatoryUS6 papers
- Lowell ObservatoryUS5 papers
- U.S. National Science FoundationUS4 papers
- Herzberg Institute of AstrophysicsCA3 papers
- The University of Texas at AustinUS3 papers
- Center for Astrophysics Harvard & SmithsonianUS2 papers
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19 papers · 1 filter
A Survey of Local Group Galaxies Currently Forming Stars: III. A Search for Luminous Blue Variables and Other H-alpha Emission-Lined Stars
Philip Massey, Reagin T. McNill, K. A. G. Olsen +5
We describe a search for H-alpha emission-lined stars in M31, M33, and seven dwarfs in or near the Local Group (IC 10, NGC 6822, WLM, Sextans B, Sextans A, Pegasus and the Phoenix…
New Distant Companions to Known Nearby Stars. II. Faint companions of Hipparcos stars and the frequency of wide binary systems
Sebastien Lepine, Bethany Bongiorno
We perform a search for faint, common proper motion companions of Hipparcos stars using the recently published LSPM-north catalog of stars with proper motion mu>0.15 arcsec/yr. Our…
The Recurrent Eclipse of an Unusual Pre--Main-Sequence Star in IC 348
S. Nordhagen, W. Herbst, E. C. Williams +1
The recurrence of a previously documented eclipse of a solar-like pre--main-sequence star in the young cluster IC 348 has been observed. The recurrence interval is 4.7 yr…
The Variability and Rotation of Pre-main Sequence Stars in IC 348: Does Intracluster Environment Influence Stellar Rotation?
S. Nordhagen, W. Herbst, K. L. Rhode +1
A variability study of the young cluster IC 348 at Van Vleck Observatory has been extended to a total of seven years. Twelve new periodic stars have been found in the last two year…
A Survey of Local Group Galaxies Currently Forming Stars. I. UBVRI Photometry of Stars in M31 and M33
Philip Massey, K. A. G. Olsen, Paul W. Hodge +4
We present UBVRI photometry obtained from Mosaic images of M31 and M33 using the KPNO 4-m telescope. The survey covers 2.2 sq degrees of M31, and 0.8 sq degrees of M33, chosen so a…
The Effective Temperature Scale of Galactic Red Supergiants: Cool, But Not As Cool As We Thought
Emily M. Levesque, Philip Massey, K. A. G. Olsen +4
We use moderate-resolution optical spectrophotometry and the new MARCS stellar atmosphere models to determine the effective temperatures of 74 Galactic red supergiants. From these…