SPECTRAL CLASSIFICATION OF THE BRIGHTEST OBJECTS IN THE GALACTIC STAR-FORMING REGION W40

@article{Shuping2012SPECTRALCO,
  title={SPECTRAL CLASSIFICATION OF THE BRIGHTEST OBJECTS IN THE GALACTIC STAR-FORMING REGION W40},
  author={R. Y. Shuping and William D. Vacca and Marc Frederick Kassis and Katelyn Yu},
  journal={The Astronomical Journal},
  year={2012},
  volume={144}
}
We present high signal-to-noise, moderate resolution (R ≈ 2000) near-infrared spectra, as well as 10 μm imaging, for the brightest members of the central stellar cluster in the W40 H ii region, obtained using the SpeX and MIRSI instruments at NASA's Infrared Telescope Facility. Using these observations combined with archival Spitzer Space Telescope data, we have determined the spectral classifications, extinction, distances, and spectral energy distributions (SEDs) for the brightest members of… 

THE W40 REGION IN THE GOULD BELT: AN EMBEDDED CLUSTER AND H ii REGION AT THE JUNCTION OF FILAMENTS

We present a multiwavelength study of the W40 star-forming region using infrared (IR) observations in the UKIRT JHK bands, Spitzer Infrared Array Camera bands, and Herschel PACS bands, 2.12 μm H2

Chandra Detection of an Evolved Population of Young Stars in Serpens South

We present a Chandra study of the deeply embedded Serpens South star-forming region, examining cluster structure and disk properties at the earliest stages. In total, 152 X-ray sources are detected.

Candidate X-Ray-emitting OB Stars in MYStIX Massive Star-forming Regions

Massive O-type and early B-type (OB) stars in the nearby Galaxy remain incompletely cataloged due to high extinction, bright visible and infrared nebular emission in H ii regions, and high field star

A Multiwavelength Look at Galactic Massive Star-forming Regions

We present a multiwavelength study of 28 Galactic massive star-forming H ii regions. For 17 of these regions, we present new distance measurements based on Gaia DR2 parallaxes. By fitting a

THE GOULD’S BELT VERY LARGE ARRAY SURVEY. II. THE SERPENS REGION

We present deep (∼17 μJy) radio continuum observations of the Serpens molecular cloud, the Serpens south cluster, and the W40 region obtained using the Very Large Array in its A configuration. We

FEEDBACK: a SOFIA Legacy Program to Study Stellar Feedback in Regions of Massive Star Formation

FEEDBACK is a SOFIA (Stratospheric Observatory for Infrared Astronomy) legacy program dedicated to study the interaction of massive stars with their environment. It performs a survey of 11 galactic

OVERVIEW OF THE MASSIVE YOUNG STAR-FORMING COMPLEX STUDY IN INFRARED AND X-RAY (MYStIX) PROJECT

The Massive Young Star-Forming Complex Study in Infrared and X-ray (MYStIX) seeks to characterize 20 OB-dominated young clusters and their environs at distances d ⩽ 4 kpc using imaging detectors on

A DEEP NEAR-INFRARED SURVEY TOWARD THE AQUILA MOLECULAR CLOUD. I. MOLECULAR HYDROGEN OUTFLOWS

We have performed an unbiased, deep near-infrared survey toward the Aquila molecular cloud with a sky coverage of ∼1 deg2. We identified 45 molecular hydrogen emission-line objects (MHOs), of which

An Initial Overview of the Extent and Structure of Recent Star Formation within the Serpens Molecular Cloud Using Gaia Data Release 2

The dense clusters within the Serpens Molecular Cloud are among the most active regions of nearby star formation. In this paper, we use Gaia DR2 parallaxes and proper motions to statistically measure

DENSE CLUMPS AND CANDIDATES FOR MOLECULAR OUTFLOWS IN W40

We report the results of the 12CO (J = 3−2) and HCO+ (J = 4−3) observations of the W40 H ii region with the Atacama Submillimeter Telescope Experiment (ASTE) 10 m telescope (HPBW ≃ 22″) to search for

References

SHOWING 1-10 OF 40 REFERENCES

THE INFRARED TELESCOPE FACILITY (IRTF) SPECTRAL LIBRARY: COOL STARS

We present a 0.8–5 μm spectral library of 210 cool stars observed at a resolving power of R ≡ λ/Δλ ∼ 2000 with the medium-resolution infrared spectrograph, SpeX, at the 3.0 m NASA Infrared Telescope

A CHANDRA OBSERVATION OF THE OBSCURED STAR-FORMING COMPLEX W40

The young stellar cluster illuminating the W40 H ii region, one of the nearest massive star-forming regions, has been observed with the ACIS detector on board the Chandra X-ray Observatory. Due to

First firm spectral classification of an early-B pre-main-sequence star: B275 in M 17

The optical to near-infrared (300−2500 nm) spectrum of the candidate massive young stellar object (YSO) B275, embedded in the star-forming region M 17, has been observed with X-shooter on the ESO

A Medium Resolution Near-Infrared Spectral Atlas of O and Early-B Stars

We present intermediate-resolution (R ~ 8000-12,000) high signal-to-noise (S/N) H- and K-band spectroscopy of a sample of 37 optically visible stars, ranging in spectral type from O3 to B3 and

Spectral atlas of massive stars around He I 10830 A

We present a digital atlas of peculiar, high-luminosity massive stars in the near-infrared region (10470-11000 A) at medium resolution (R~7000). The spectra are centered around He I 10830 A, which is

X-ray emission from near-main-sequence B stars

Results of a Roengten Satellite (ROSAT) X-ray survey of 12 nearby near-main-sequence B stars are presented. Objects with very low interstellar hydrogen column density were chosen to study the soft

H-Band spectroscopic classification of OB stars

We present a new spectroscopic classification for OB stars based on H-band (1.5 micron to 1.8 micron) observations of a sample of stars with optical spectral types. Our initial sample of nine stars

1- m spectroscopy of normal OB stars

SUMMARY We have obtained spectra of 70 normal OB stars in the near-IR I (1-μm) band. The strongest features are those due to lines of the hydrogen Paschen series and neutral and ionized helium,

10830 A He I observations of 455 stars

A comparison with K line, X-ray and other data, of 10830 A equivalent widths (EW) measurements in 890 image tube spectra of 455 stars shows that for the case of G stars, the EW correlates well with K

An Infrared Spectroscopic Sequence of M, L, and T Dwarfs

We present a 0.6-4.1 μm spectroscopic sequence of M, L, and T dwarfs. The spectra have R ≡ λ/Δλ ≈ 2000 from 0.9 to 2.4 μm and R = 2500-200 from 2.9 to 4.1 μm. These new data nearly double the number