CHARACTERIZING WOLF-RAYET STARS IN THE NEAR- AND MID-INFRARED

@article{Faherty2014CHARACTERIZINGWS,
  title={CHARACTERIZING WOLF-RAYET STARS IN THE NEAR- AND MID-INFRARED},
  author={J. Faherty and M. Shara and D. Zurek and G. Kanarek and A. Moffat},
  journal={The Astronomical Journal},
  year={2014},
  volume={147},
  pages={115}
}
We present refined color-color selection criteria for identifying Wolf-Rayet (WR) stars using available mid-infrared (MIR) photometry from WISE in combination with near-infrared (NIR) photometry from the Two Micron All Sky Survey. Using a sample of spectrally classified objects, we find that WR stars are well distinguished from the field stellar population in the (W1 – W2) versus (J – Ks ) color-color diagram, and further distinguished from other emission line objects such as planetary nebulae… Expand
A near-infrared survey of the inner Galactic plane for Wolf–Rayet stars – III. New methods: faintest WR stars
A new method of image subtraction is applied to images from a J, K, and narrow-band imaging survey of 300 square degrees of the plane of the Galaxy, searching for new Wolf-Rayet stars. Our surveyExpand
Spatial distribution of Galactic Wolf-Rayet stars and implications for the global population
We construct revised near-infrared absolute magnitude calibrations for 126 Galactic Wolf-Rayet (WR) stars at known distances, based in part upon recent large scale spectroscopic surveys. ApplicationExpand
A survey for hot central stars of planetary nebulae - I. Methods and first results
We present the results of initial spectrographic followup with the Very Large Telescope (UT3, Melipal) for $K_s \ge 14$ Galactic plane CIV emission-line candidates in the near-infrared (NIR). These 7Expand
The Wolf-Rayet Content of the Galaxies of the Local Group and Beyond.
Wolf-Rayet stars (WRs) represent the end of a massive star's life as it is about to turn into a supernova. Obtaining complete samples of such stars across a large range of metallicities posesExpand
Massive Stars in the W33 Giant Molecular Complex
Rich in HII regions, giant molecular clouds are natural laboratories to study massive stars and sequential star formation. The Galactic star forming complex W33 is located at l=~12.8deg and at aExpand
Identifying two groups of massive stars aligned in the $l\sim38^{\circ}$ Galactic direction
Context: Recent near-infrared data have contributed to unveil massive and obscured stellar populations in both new and previously known clusters in our Galaxy. These discoveries lead us to view theExpand
On the ring nebulae around runaway Wolf–Rayet stars
Wolf-Rayet stars are advanced evolutionary stages of massive stars. Despite their large mass-loss rates and high wind velocities, none of them display a bow shock, although a fraction of them areExpand
The Structure of the Young Star Cluster NGC 6231. I. Stellar Population
NGC 6231 is a young cluster (age ~2-7 Myr) dominating the Sco OB1 association (distance ~1.59 kpc) with ~100 O and B stars and a large pre-main-sequence stellar population. We combine a reanalysis ofExpand
The luminosity and stellar mass functions of red W1–W2 galaxies
We present a study of nearby galaxies as a function of their [3.4]-[4.6] colour. Galaxies that are red in their [3.4]-[4.6] colour contain heated dust and the reddest systems ([3.4]-[4.6] > 0.5) areExpand
PALOMAR/TRIPLESPEC OBSERVATIONS OF SPITZER/MIPSGAL 24 μm CIRCUMSTELLAR SHELLS: UNVEILING THE NATURES OF THEIR CENTRAL SOURCES
We present near-IR spectroscopic observations of the central sources in 17 circumstellar shells from a sample of more than 400 "bubbles" discovered in the Spitzer/MIPSGAL 24 μm survey of the GalacticExpand
...
1
2
...

References

SHOWING 1-10 OF 30 REFERENCES
Searching for hidden Wolf–Rayet stars in the Galactic plane – 15 new Wolf–Rayet stars
We report the discovery of 15 previously unknown Wolf–Rayet (WR) stars found as part of an infrared (IR) broad-band study of candidate WR stars in the Galaxy. We have derived an empirically basedExpand
RED EYES ON WOLF-RAYET STARS: 60 NEW DISCOVERIES VIA INFRARED COLOR SELECTION
We have spectroscopically identified 60 Galactic Wolf-Rayet (WR) stars, including 38 nitrogen types (WN) and 22 carbon types (WC). Using photometry from the Spitzer/GLIMPSE and Two Micron All SkyExpand
ISOLATED WOLF-RAYET STARS AND O SUPERGIANTS IN THE GALACTIC CENTER REGION IDENTIFIED VIA PASCHEN-α EXCESS
We report the discovery of 19 hot, evolved, massive stars near the Galactic center region (GCR). These objects were selected for spectroscopy owing to their detection as strong sources of Paschen-αExpand
A census of the Wolf–Rayet content in Westerlund 1 from near-infrared imaging and spectroscopy
New NTT/SOFI imaging and spectroscopy of the Wolf-Rayet population in Westerlund 1 are presented. Narrow-band near-IR imaging together with follow up spectroscopy reveals four new Wolf-Rayet stars,Expand
Near- and Mid-Infrared colors of evolved stars in the Galactic plane. The Q1 and Q2 parameters.
Context. Mass-loss from evolved stars chemically enriches the interstellar medium (ISM). Stellar winds from massive stars and their explosions as supernovae shape the ISM and trigger star formation.Expand
A NEAR-INFRARED SURVEY OF THE INNER GALACTIC PLANE FOR WOLF-RAYET STARS. II. GOING FAINTER: 71 MORE NEW W-R STARS
We are continuing a J, K and narrowband imaging survey of 300 deg2 of the plane of the Galaxy, searching for new Wolf-Rayet (W-R) stars. Our survey spans 150° in Galactic longitude and reaches 1°Expand
A NEAR-INFRARED SURVEY OF THE INNER GALACTIC PLANE FOR WOLF-RAYET STARS. I. METHODS AND FIRST RESULTS: 41 NEW WR STARS
The discovery of new Wolf-Rayet (WR) stars in our Galaxy via large-scale narrowband optical surveys has been severely limited by dust extinction. Recent improvements in infrared technology have madeExpand
A K-Band Spectral Atlas of Wolf-Rayet Stars
We present K-band spectra (R ~ 525) of 38 northern Galactic WR Stars, of which 16 are WC, 19 are WN, two are WN/WC, and one is WO. The spectra have the expected trend of stronger lines for higherExpand
Discovery of Hot Supergiant Stars near the Galactic Center
We report new results of a campaign to find Wolf-Rayet and O (WR/O) stars and high-mass X-ray binaries (HMXBs) in the Galactic center. We searched for candidates by cross-correlating the Two MicronExpand
A Deep Survey for Galactic Wolf-Rayet Stars. II. Implications for Galactic Structure and Massive Star Formation*
We have completed a direct narrowband-broadband Schmidt plate survey of large areas of the southern Milky Way for new Wolf-Rayet (W-R) stars as faint as 19th b magnitude. The 31 newly detected starsExpand
...
1
2
3
...