scholarly journals High-resolution Spectroscopic Monitoring Observations of FU Orionis–type Object, V960 Mon

2020 ◽  
Vol 900 (1) ◽  
pp. 36
Author(s):  
Sunkyung Park ◽  
Jeong-Eun Lee ◽  
Tae-Soo Pyo ◽  
Daniel T. Jaffe ◽  
Gregory N. Mace ◽  
...  
Keyword(s):  
High Resolution ◽  
Spectroscopic Monitoring ◽  
Type Object

scholarly journals Study of the variability of Nova V5668 Sgr, based on high-resolution spectroscopic monitoring

2017 ◽  
Vol 338 (1) ◽  
pp. 91-102 ◽  
Author(s):  
D. Jack ◽  
J. de J. Robles Pérez ◽  
I. De Gennaro Aquino ◽  
K.-P. Schröder ◽  
U. Wolter ◽  
...  
Keyword(s):  
High Resolution ◽  
Spectroscopic Monitoring

scholarly journals ∊ Aur in eclipse: Post-AGB primary and disk-shaped secondary

2011 ◽  
Vol 7 (S283) ◽  
pp. 454-455
Author(s):  
Chinnathambi Muthumariappan ◽  
Mudumba Parthasarathy ◽  
Kanniah Jayakumar ◽  
Manickam Appakutty
Keyword(s):  
High Resolution ◽  
Binary System ◽  
Radiative Transfer ◽  
Transfer Problem ◽  
Line Profiles ◽  
Radiative Transfer Problem ◽  
Eclipsing Binary ◽  
Preliminary Results ◽  
Spectroscopic Monitoring

AbstractWe present physical and chemcal properties of the disk in the eclipsing binary system ∊ Aur by solving 2D radiative transfer problem. We also present preliminary results of our high resolution spectroscopic monitoring of K I, Na, and Hα line profiles variation during the totality phase of the recent eclipse of ∊ Aur.

TIGvival: High-resolution spectroscopic monitoring of LPV stars

2018 ◽  
Vol 14 (S343) ◽  
pp. 548-549
Author(s):  
Uwe Wolter ◽  
Dieter Engels ◽  
Bernhard Aringer ◽  
Bernd Freytag
Keyword(s):  
High Resolution ◽  
Monitoring Program ◽  
Chemical Properties ◽  
Low Noise ◽  
Long Period ◽  
Spectroscopic Monitoring ◽  
Robotic Telescope ◽  
Sample Case ◽  
Visual Light ◽  
And Chemical Properties

AbstractTIGvival is a spectroscopic monitoring program of long-period variables (LPV) using our robotic telescope TIGRE. Since 2013, we obtain low-noise, high-resolution spectra (R= 20 000) that cover the optical regime (3800 Å to 8800 Å). We are now continuously monitoring 7 LPVs with different periods and chemical properties. Our 350+ spectra evenly sample the target cycles, as far as ground-based observations allow. Analyzing the TIGvival spectra of Mira as a sample case, our measurements indicate that the strength of the TiO-absorption is phase-shifted with respect to the visual light curve.

scholarly journals High-resolution spectroscopy of two LBV cycles of HR Car

2003 ◽  
Vol 212 ◽  
pp. 243-244 ◽  
Author(s):  
Thomas Szeifert ◽  
Andreas Kaufer ◽  
Paul A. Crowther ◽  
Otmar Stahl ◽  
Chris Sterken
Keyword(s):  
High Resolution ◽  
Stellar Wind ◽  
Optical Spectra ◽  
High Resolution Spectroscopy ◽  
Luminous Blue Variables ◽  
Wide Part ◽  
Spectroscopic Monitoring ◽  
Wind Characteristics ◽  
Long Timescales

Luminous Blue Variables (LBVs or S Dor Variables) are showing characteristic variability of very long timescales of a decade and more. During their expansion and contraction phases, they move across a wide part of the H-R diagram with dramatic changes of their stellar wind characteristics, radius and temperature. We present results of our long-term spectroscopic monitoring campaigns for the galactic star HR Car with optical spectra taken over 13 years and two minimum and maximum phases observed during this time.

Development of High Resolution FE-SEM (8"FE-SEM) For 8-Inches wafer inspection

1998 ◽  
Vol 4 (S2) ◽  
pp. 406-407
Author(s):  
K. Ohara ◽  
C. Nielsen ◽  
M. Saito
Keyword(s):  
High Resolution ◽  
Semiconductor Processing ◽  
Wafer Inspection ◽  
Strong Point ◽  
Transmission Electron ◽  
Resolution Observation ◽  
Type Object ◽  
Electron Microscopes ◽  
Acceleration Voltage ◽  
High Resolution Observation

Semiconductor production using 8-inches wafers seems to be widely carried out in semiconductor factories. Many FE-SEMs are coming to be used for their particle/defect inspection. As semiconductor processing turns precise, the need of a high resolution FE-SEM has been rising all the more.Now, JEOL announces a high resolution FE-SEM (8"FE-SEM) for 8-inches wafer inspection, which takes over the strong point of the semi-in-lens field emission scanning electron microscope (FE-SEM) JSM-6340F which has been getting expensive evaluation with its high resolution performance. The 8"FE-SEM possesses a resolution of 3.0nm at lkV of its acceleration voltage and 1.2nm at 15kV, as its semi-in-lens type object lens makes it possible to minimize the aberration.High resolution observation and inclined wafer observation can be selected properly by changing the wafer holder, as such a holder exchange system has been usually used for transmission electron microscopes.

scholarly journals Time-Resolved High-Resolution Spectroscopy of roAp Stars

2002 ◽  
Vol 185 ◽  
pp. 284-287
Author(s):  
O. Kochukhov ◽  
T. Ryabchikova
Keyword(s):  
Rare Earth ◽  
High Resolution ◽  
Detailed Analysis ◽  
High Resolution Spectroscopy ◽  
Spectral Features ◽  
Line Profiles ◽  
Time Resolved ◽  
Spectroscopic Monitoring ◽  
Rotational Modulation ◽  
Very High

AbstractWe report results of Spectroscopic monitoring of the roAp stars γ Equ, α Cir and HR 3831 with the ESO 3.6-meter telescope. Series of very high-resolution and high S/N spectra allowed to resolve changes of line profiles due to the pulsations. We found that pulsational behaviour of all three roAp stars is dominated by the variations of the doubly ionized rare-earth lines. Detailed analysis of the pulsational changes of Nd III and Pr III spectral features allowed us to identify the pulsational mode of γ Equ and to study rotational modulation of the pulsational pattern in the spectra of α Cir and HR 3831.

scholarly journals Rotationally Modulated Winds of BA-Type Supergiants

1999 ◽  
Vol 169 ◽  
pp. 11-18
Author(s):  
Andreas Kaufer
Keyword(s):  
Time Series ◽  
High Resolution ◽  
High Velocity ◽  
Surface Structures ◽  
Stellar Rotation ◽  
Spectroscopic Monitoring ◽  
Rotation Periods ◽  
Rotating Surface ◽  
Circumstellar Environments ◽  
Potential Use

AbstractExtended spectroscopic monitoring programs with high resolution and coverage in wavelength and time have revealed a new picture of the winds and the circumstellar environments of late B- and early A-type supergiants. Dramatic line-profile variations (LPV) of the wind-sensitive Hα line with characteristic cyclical V/R variations indicate the presence of deviations of the envelopes from spherical symmetry. Time-series analysis of these LPVs suggest that the wind variations are caused by rotating surface structures which modulate the lower wind region. Occasionally observed high-velocity absorptions (HVA) indicate the presence of rotating extended and dense streakline or loop structures in the envelopes. The potential use of these circumstellar features to determine the true stellar rotation periods is discussed.

scholarly journals High resolution spectroscopy at the ESO 50 cm telescope: spectroscopic monitoring of luminous hot stars

1994 ◽  
Vol 162 ◽  
pp. 532-533
Author(s):  
A. Kaufer ◽  
H. Mandel ◽  
O. Stahl ◽  
B. Wolf ◽  
Th. Szeifert ◽  
...  
Keyword(s):  
High Resolution ◽  
Line Profile ◽  
High Resolution Spectroscopy ◽  
Hot Stars ◽  
Time Line ◽  
Luminous Blue Variables ◽  
Spectroscopic Monitoring

Galactic Luminous Blue Variables and A- and B-type supergiants were monitored spectroscopically with high resolution in wavelength and time. Line profile variations on different timescales are found.

scholarly journals High-resolution spectroscopic monitoring of SV Camelopardalis

2002 ◽  
Vol 392 (3) ◽  
pp. 963-970 ◽  
Author(s):  
H. Lehmann ◽  
A. Hempelmann ◽  
U. Wolter
Keyword(s):  
High Resolution ◽  
Spectroscopic Monitoring
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