Results 31 to 40 of about 7,202 (193)

ACTIVIVE PHENOMENA OBSERVED IN ATMOSPHERIC LINES OF THE HERBIG AE STAR HD163296

Odessa Astronomical Publications, 2008
We present new results of a high- resolution spectroscopic investigation of the young Ae Herbig star HD163296. Nineteen spectra of this object had been obtained on May 8 - 10, 2002 at the ESO with the FEROS high-resolution echelle spectrometer (R=48000 ...
M. A. Pogodin, M. M. Guimaraes, S. H.P. Alencar, W. J.B. Corradi, S. L.A. Vieira   +4 more
doaj   +1 more source

The M Dwarf GJ 436 and its Neptune-Mass Planet [PDF]

, 2006
We determine stellar parameters for the M dwarf GJ 436 that hosts a Neptune-mass planet. We employ primarily spectral modeling at low and high resolution, examining the agreement between model and observed optical spectra of five comparison stars of type,
A. T. Shreve, Baraffe I., Delfosse X., Delfosse X., E. B. Ford, G. B. Basri, G. W. Marcy, H. L. Maness, Hubickyj O., Jones H. R. A., Jones H. R. A., P. H. Hauschildt, Perryman M. A. C., R. P. Butler, S. S. Vogt, Siess L.   +15 more
core   +3 more sources

Solar Contamination in Extreme-precision Radial-velocity Measurements: Deleterious Effects and Prospects for Mitigation [PDF]

, 2020
Solar contamination, due to moonlight and atmospheric scattering of sunlight, can cause systematic errors in stellar radial velocity (RV) measurements that significantly detract from the ~10 cm s−1 sensitivity required for the detection and ...
Bender, Chad F., Blake, Cullen H., Golub, Eli, Gupta, Arvind, Halverson, Samuel, Jaehnig, Kurt P., Kanodia, Shubham, Kaplan, Kyle, Logsdon, Sarah E., Mahadevan, Suvrath, McElwain, Michael W., Monson, Andrew, Ninan, Joe P., Rajagopal, Jayadev, Robertson, Paul, Roy, Arpita, Schwab, Christian, Stefansson, Gudmundur, Terrien, Ryan C., Wang, Sharon Xuesong, Wolf, Marsha J., Wright, Jason T.   +21 more
core   +2 more sources

CHIRON – A new high resolution spectrometer for CTIO

EPJ Web of Conferences, 2011
Small telescopes can play an important role in the search for exoplanets because they offer an opportunity for high cadence observations that are not possible with large aperture telescopes.
Marcy G.W., Fischer D.A., Tokovinin A., Spronck J.F.P., Schwab C.   +4 more
doaj   +1 more source

CIRCUMSTELLAR ACTIVITY OF THE HERBIG AE STAR HD163296

Odessa Astronomical Publications, 2007
We present new results of a high-resolution spectroscopic investigation of the young Ae Herbig star HD163296. Nineteen spectra of this object had been obtained on May 8 - 10, 2002 at the ESO with the FEROS echelle spectrometer installed at the 1.52m ...
M. A. Pogodin, M. M. Guimaraes, S. H. P. Alencar, W. J. B. Corradi, S. L. A. Vieira   +4 more
doaj   +1 more source

The development of the Atmospheric Measurements by Ultra-Light Spectrometer (AMULSE) greenhouse gas profiling system and application for satellite retrieval validation [PDF]

Atmospheric Measurement Techniques, 2020
We report in this paper the development of an embedded ultralight spectrometer (<3 kg) based on tuneable diode laser absorption spectroscopy (with a sampling rate of 24 Hz) in the mid-infrared spectral region.
L. Joly, O. Coopmann, V. Guidard, T. Decarpenterie, N. Dumelié, J. Cousin, J. Burgalat, N. Chauvin, G. Albora, R. Maamary, Z. Miftah El Khair, D. Tzanos, J. Barrié, É. Moulin, P. Aressy, A. Belleudy   +15 more
doaj   +1 more source

TEDI: the TripleSpec Exoplanet Discovery Instrument

, 2007
The TEDI (TripleSpec - Exoplanet Discovery Instrument) will be the first instrument fielded specifically for finding low-mass stellar companions. The instrument is a near infra-red interferometric spectrometer used as a radial velocimeter.
Edelstein, Jerry, Erskine, David J., Feuerstein, W. Michael, Gull, George E., Henderson, Charles, Herter, Terry, Lloyd, James P., Marckwordt, Mario, Muirhead, Phillip, Muterspaugh, Matthew Ward, Parshley, Stephen C., Wishnow, Ed   +11 more
core   +1 more source

Structured light illumination for order sorting in Echelle spectrometers

Optics Express, 2017
نبلغ عن تشغيل مطياف الدرجة تحت إضاءة ضوئية منظمة. يتم ترميز كل ترتيب حيود لمقياس الطيف ببنية دورية معينة تسمح بفرز الترتيب عن طريق التحليل العددي بعد الكشف. على النقيض من مقاييس طيف الدرجة المتقاطعة، تتداخل الطلبات في هذا النهج عند مستوى الكشف بحيث يمكن إجراء المعايرة الطيفية بسهولة بطول موجي مرجعي واحد.
Óscar Martínez-Matos, Pablo Vaveliuk, Carolina Rickenstorff-Parrao   +2 more
openaire   +3 more sources

High-resolution SOFIA/EXES Spectroscopy of Water Absorption Lines in the Massive Young Binary W3 IRS 5

The Astrophysical Journal, 2023
We present in this paper mid-infrared (5–8 μ m) spectroscopy toward the massive young binary W3 IRS 5, using the Echelon Cross Echelle Spectrograph (EXES) spectrometer in high-resolution mode ( R ∼ 50,000) from the NASA Stratospheric Observatory for ...
Jialu Li, Adwin Boogert, Andrew G. Barr, Curtis DeWitt, Maisie Rashman, David Neufeld, Nick Indriolo, Yvonne Pendleton, Edward Montiel, Matt Richter, J. E. Chiar, Alexander G. G. M. Tielens   +11 more
doaj   +1 more source

Cooled echelle grating spectrometer [PDF]

, 1980
A cooled echelle grating spectrometer for detecting wavelengths between one micron and fifteen microns is disclosed. More specifically, the spectrometer has a cross-dispersing grating for ordering infrared energy and an echelle grating for further ...
Beer, R.
core   +1 more source