Document
... passive evolution of stellar populations formed at z>2-3. Slope is primarily driven by mass-metallicity relation. Morphologically (HST)-selected Es and S0s (Bower et al. 1992, Aragon-Salamanca et al. 1993, Rakos et al. 1995, Stanford et al. 1995, 1996, 1997, 1998, Schade et al. 1996, 1997, Ellis et ...
... passive evolution of stellar populations formed at z>2-3. Slope is primarily driven by mass-metallicity relation. Morphologically (HST)-selected Es and S0s (Bower et al. 1992, Aragon-Salamanca et al. 1993, Rakos et al. 1995, Stanford et al. 1995, 1996, 1997, 1998, Schade et al. 1996, 1997, Ellis et ...
Wavelength calibration from 1 − 5µ m for the CRIRES+ high
... The gas-cell wavelength calibration method is the only technique that provides a wavelength reference information and enables monitoring of instrumental effects such as drifts in the dispersion relation and changes in slit illumination simultaneously with the astronomical observation, both in time a ...
... The gas-cell wavelength calibration method is the only technique that provides a wavelength reference information and enables monitoring of instrumental effects such as drifts in the dispersion relation and changes in slit illumination simultaneously with the astronomical observation, both in time a ...
Protoplanetary Discs
... “If this interpretation of T Tauri stars is correct, it will provide new and important evidence on the conditions under which the planets in the solar system were formed.” Lynden-Bell & Pringle 1974 (as quoted in Hartmann 2000) Definitions: T Tauri star (TTS): young star ≲ 10-20 Myr with 0.5 < M < 2 ...
... “If this interpretation of T Tauri stars is correct, it will provide new and important evidence on the conditions under which the planets in the solar system were formed.” Lynden-Bell & Pringle 1974 (as quoted in Hartmann 2000) Definitions: T Tauri star (TTS): young star ≲ 10-20 Myr with 0.5 < M < 2 ...
25 Years of the Hubble Space Telescope - Speaker
... The electric-blue image of Jupiter’s northern aurora shows the main oval of the aurora, which is centered on the magnetic north pole, plus more diffuse emissions inside the polar cap. Though the aurora resembles the same phenomenon that crowns Earth's polar regions, the blue Hubble image shows uniqu ...
... The electric-blue image of Jupiter’s northern aurora shows the main oval of the aurora, which is centered on the magnetic north pole, plus more diffuse emissions inside the polar cap. Though the aurora resembles the same phenomenon that crowns Earth's polar regions, the blue Hubble image shows uniqu ...
The Circumstellar Environments of Young Stars at AU Scales
... FU Orionis). The interferometer data can also can be compared to predictions of specific physical models and this exercise has allowed to rule out certain classes of models, and provided crucial constraints to models that can be made to reproduce the spectral and spatial observables. A note on nomen ...
... FU Orionis). The interferometer data can also can be compared to predictions of specific physical models and this exercise has allowed to rule out certain classes of models, and provided crucial constraints to models that can be made to reproduce the spectral and spatial observables. A note on nomen ...
User`s Manual for DAOPHOT II This manual is intended as a guide
... (5) A principal source of photometric error for the faint stars is the difficulty of defining what is meant by the term “sky brightness” in crowded fields. This is not simply the practical difficulty of identifying “contaminated” pixels in the sky annulus so that they can be omitted from the average ...
... (5) A principal source of photometric error for the faint stars is the difficulty of defining what is meant by the term “sky brightness” in crowded fields. This is not simply the practical difficulty of identifying “contaminated” pixels in the sky annulus so that they can be omitted from the average ...
design for the TMT mid-infrared adaptive optics system
... At mid-infrared wavelengths ground-based observations are background-limited and the observing time to reach a fixed signal-to-noise ratio on point sources for a telescope at the diffraction limit decreases with the fourth power of the telescope diameter. At these wavelengths, the 30-meter TMT teles ...
... At mid-infrared wavelengths ground-based observations are background-limited and the observing time to reach a fixed signal-to-noise ratio on point sources for a telescope at the diffraction limit decreases with the fourth power of the telescope diameter. At these wavelengths, the 30-meter TMT teles ...
SXDS Highlights : Subaru / FOCAS Spectroscopy
... Natural guide star AO system on Subaru telescope with IRCS. 154 hours of observation in total. 13 FoVs with 36 LBGs , 1 RadioG., and 7 DRGs are observed. Typical on-source effective integration is 5 hours. Typical PSF size at the target position is FWHM=0.2” (~1.5kpc@z=3) ...
... Natural guide star AO system on Subaru telescope with IRCS. 154 hours of observation in total. 13 FoVs with 36 LBGs , 1 RadioG., and 7 DRGs are observed. Typical on-source effective integration is 5 hours. Typical PSF size at the target position is FWHM=0.2” (~1.5kpc@z=3) ...
Photometric Properties of Ceres from Telescopic
... Ceres was observed in 2014 in a way that was specifically designed for measuring albedo using the 7 Dawn FC filters. A 0.28-meter and a 0.35-meter SchmidtCassegrain telescope and SBIG ST-10XME CCD camera at the Hereford Arizona Observatory, HAO (MPC code G95) were used with the 7 FC filters to creat ...
... Ceres was observed in 2014 in a way that was specifically designed for measuring albedo using the 7 Dawn FC filters. A 0.28-meter and a 0.35-meter SchmidtCassegrain telescope and SBIG ST-10XME CCD camera at the Hereford Arizona Observatory, HAO (MPC code G95) were used with the 7 FC filters to creat ...
Supernovae and Gamma-Ray Bursts (draft)
... associated with a Type Ia supernova (SN Ia). These supernovae have no hydrogen, but strong Si lines. Si and also S are intermediate-mass nuclei which are produced in abundance in the part of the exploding white dwarf that does not burn completely to NSE, and therefore provides a very characteristic ...
... associated with a Type Ia supernova (SN Ia). These supernovae have no hydrogen, but strong Si lines. Si and also S are intermediate-mass nuclei which are produced in abundance in the part of the exploding white dwarf that does not burn completely to NSE, and therefore provides a very characteristic ...
UV, IR, and mm Studies of CO Surrounding the Red Supergiant α
... spectral features in the synthetic spectrum (green) nicely reproduce the observations, e.g., 1400-1500Å, while some do not, e.g., 1550-1620Å. These models will be fine tuned using the spatial information gleaned from the Phoenix/Gemini-S long-slit spectra and CARMA spectral-interferometry. The therm ...
... spectral features in the synthetic spectrum (green) nicely reproduce the observations, e.g., 1400-1500Å, while some do not, e.g., 1550-1620Å. These models will be fine tuned using the spatial information gleaned from the Phoenix/Gemini-S long-slit spectra and CARMA spectral-interferometry. The therm ...
Lectures 10 and 11 PPT
... optical depth is only a few percent. Most of light just keeps on going upwards. • Natural lifetime of D2 transition is short: 16 nsec • Can’t just pour on more laser power, because sodium D2 transition saturates: – Once all the atoms that CAN be in the excited state ARE in the excited state, return ...
... optical depth is only a few percent. Most of light just keeps on going upwards. • Natural lifetime of D2 transition is short: 16 nsec • Can’t just pour on more laser power, because sodium D2 transition saturates: – Once all the atoms that CAN be in the excited state ARE in the excited state, return ...
Navigating the Night Sky Checklist
... The ecliptic marks the path of the sun. It’s the projection of Earth’s orbit onto the sky. And it’s an essential part of any stargazer’s vocabulary. ...
... The ecliptic marks the path of the sun. It’s the projection of Earth’s orbit onto the sky. And it’s an essential part of any stargazer’s vocabulary. ...
my dissertation (PhD. Thesis) - Argelander
... of all sizes and distances ranging from our “backyard”, namely the Milky Way itself and the Local Group to galaxies at a redshift of z ' 11 and higher. Each approach can deliver different information and has its advantages and disadvantages. In the following, I briefly describe what can be learned b ...
... of all sizes and distances ranging from our “backyard”, namely the Milky Way itself and the Local Group to galaxies at a redshift of z ' 11 and higher. Each approach can deliver different information and has its advantages and disadvantages. In the following, I briefly describe what can be learned b ...
On the characterisation of the Galactic warp in the Gaia era
... all of your support and patience, aspiring guidance and immense knowledge. You always made time to help and advise me. I have been a pleasure for me to work with you. Also, I really appreciate you being so sensitive and supportive towards women’s right. Thank you Luis for being such an incredible te ...
... all of your support and patience, aspiring guidance and immense knowledge. You always made time to help and advise me. I have been a pleasure for me to work with you. Also, I really appreciate you being so sensitive and supportive towards women’s right. Thank you Luis for being such an incredible te ...
ASPEN WORKSHOP 2003
... sample of 1—6 Steidel Lstar, rejected Sextractor “stellar” images or overlapping isophotes 204 B dropouts since ACS data are deep; 20 V dropouts and 9 I dropouts but of course this is tricky based on only 1 band! Z assumed, modest decline in size: at 1500—1700Ang Petrosian radius (half light radius ...
... sample of 1—6 Steidel Lstar, rejected Sextractor “stellar” images or overlapping isophotes 204 B dropouts since ACS data are deep; 20 V dropouts and 9 I dropouts but of course this is tricky based on only 1 band! Z assumed, modest decline in size: at 1500—1700Ang Petrosian radius (half light radius ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.