High-resolution spectra of the 3.3 micrometer unidentified emission feature in NGC 7027 and HD 44179

1980 ◽  
Vol 237 ◽  
pp. L93 ◽  
Author(s):  
A. T. Tokunaga ◽  
E. T. Young
Keyword(s):  
High Resolution ◽  
Emission Feature ◽  
Ngc 7027

High-resolution CO observations of NGC 7027

1985 ◽  
Vol 292 ◽  
pp. 464 ◽  
Author(s):  
C. R. Masson ◽  
K. W. Cheung ◽  
G. L. Berge ◽  
M. J. Claussen ◽  
G. M. Heiligman ◽  
...  
Keyword(s):  
High Resolution ◽  
Ngc 7027 ◽  
Co Observations

Emission features in the spectrum of NGC 7027 near 3.3 microns at very high resolution

1991 ◽  
Vol 368 ◽  
pp. 195 ◽  
Author(s):  
R. P. Lowe ◽  
J. M. Moorhead ◽  
W. H. Wehlau ◽  
J.-P. Maillard
Keyword(s):  
High Resolution ◽  
Ngc 7027 ◽  
Very High

scholarly journals High-resolution radio structure and optical kinematics of NGC 7027

2003 ◽  
Vol 340 (2) ◽  
pp. 381-397 ◽  
Author(s):  
I. Bains ◽  
M. Bryce ◽  
G. Mellema ◽  
M. P. Redman ◽  
P. Thomasson
Keyword(s):  
High Resolution ◽  
Radio Structure ◽  
Ngc 7027

scholarly journals Time Resolved Optical Spectroscopy of V795 Her

1996 ◽  
Vol 158 ◽  
pp. 41-42
Author(s):  
R. J. Dickinson ◽  
R. K. Prinja ◽  
S. R. Rosen ◽  
K. Horne
Keyword(s):  
Image Analysis ◽  
High Resolution ◽  
Optical Spectroscopy ◽  
Emission Feature ◽  
Cataclysmic Variable ◽  
Two Dimensional ◽  
S Wave ◽  
Time Resolved ◽  
Two Dimensional Image ◽  
Dependent Behaviour

AbstractWe present high resolution optical spectroscopy of the cataclysmic variable (CV) V795 Her. The time- and phase- dependent behaviour of the emission source is examined using two-dimensional image analysis and Doppler reconstruction techniques on the orbital profiles. A clear S-wave modulation of a weak emission feature in the Hβ and Hγ line wings (extending to ~1800 km s−1) is present, with complex asymmetric properties.

scholarly journals Search for He I airglow emission from the hot Jupiter τ Boo b

2020 ◽  
Vol 641 ◽  
pp. A161
Author(s):  
Y. Zhang ◽  
I. A. G. Snellen ◽  
P. Mollière ◽  
F. J. Alonso-Floriano ◽  
R. K. Webb ◽  
...  
Keyword(s):  
High Resolution ◽  
Rest Frame ◽  
Emission Feature ◽  
Emission Lines ◽  
High Resolution Spectroscopy ◽  
Transmission Spectra ◽  
Hot Jupiters ◽  
Line Widths ◽  
Calar Alto ◽  
Metastable Triplet State

Context. It has been suggested that the helium absorption line at 10 830 Å that originates from the metastable triplet state 23S is an excellent probe for the extended atmospheres of hot Jupiters and their hydrodynamic escape processes. It has recently been detected in the transmission spectra of a handful of planets. The isotropic reemission will lead to helium airglow that may be observable at other orbital phases. Aims. We investigate the detectability of He I emission at 10 830 Å in the atmospheres of exoplanets using high-resolution spectroscopy. This would provide insights into the properties of the upper atmospheres of close-in gas giants. Methods. We estimated the expected strength of He I emission in hot Jupiters based on their transmission signal. We searched for the He I 10 830 Å emission feature in τ Boo b in three nights of high-resolution spectra taken by CARMENES at the 3.5m Calar Alto telescope. The spectra from each night were corrected for telluric absorption, sky emission lines, and stellar features, and were shifted to the planetary rest frame to search for the emission. Results. The He I emission is not detected in τ Boo b at a 5σ contrast limit of 4 × 10−4 for emission line widths of >20 km s−1. This is about a factor 8 above the expected emission level (assuming a typical He I transit absorption of 1% for hot Jupiters). This suggests that targeting the He I emission with well-designed observations using upcoming instruments such as VLT/CRIRES+ and E-ELT/HIRES is possible.

High-resolution spectra of the 3.29 micron interstellar emission feature - A summary

1991 ◽  
Vol 380 ◽  
pp. 452 ◽  
Author(s):  
A. T. Tokunaga ◽  
K. Sellgren ◽  
R. G. Smith ◽  
T. Nagata ◽  
A. Sakata ◽  
...  
Keyword(s):  
High Resolution ◽  
Emission Feature

scholarly journals High-Resolution CCD Imagery of NGC 6537 and NGC 7027

1993 ◽  
Vol 155 ◽  
pp. 205-205
Author(s):  
S.R. Heap
Keyword(s):  
High Resolution ◽  
Dust Extinction ◽  
Ngc 7027 ◽  
The Right ◽  
Spatially Varying

Using Hα and Hβ images obtained at the CFHT, we derived the spatially varying reddening within NGC 6537 and NGC 7027. We then corrected the observed Hβ picture for dust extinction to obtain pictures more in accord with radio maps. The left panels below show NGC 6537; the right panels, NGC 7027. The top panels show the observed Hβ picture, and the bottom panels, the Hβ picture corrected for spatially varying extinction. Note that the bright optical knot in NGC 7027 corresponds to a hole in the extinction.

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