Spectral Line VLBI - Australia Telescope National Facility
... • The maser components are extremely small (mas) and narrow (fractions of a km/s) Measure position and velocity of components with great accuracy ...
... • The maser components are extremely small (mas) and narrow (fractions of a km/s) Measure position and velocity of components with great accuracy ...
Solar Observing Curriculum Guide
... ii. It could be beneficial to download an image from 24 hours prior to the students’ observing, to provide them with the “first” data point – theirs would be the “second”. b. To complete the lesson in two days and have students take all data, repeat Step 3 above at roughly the same time the followi ...
... ii. It could be beneficial to download an image from 24 hours prior to the students’ observing, to provide them with the “first” data point – theirs would be the “second”. b. To complete the lesson in two days and have students take all data, repeat Step 3 above at roughly the same time the followi ...
PDF only - at www.arxiv.org.
... tenuous pc-wide filaments within which clouds condense to form stars, the discovery of copious amounts of water in the Universe have revolutionized our understanding of how galaxies form and evolve and how planetary systems like our own may originate. However, even Hersche ...
... tenuous pc-wide filaments within which clouds condense to form stars, the discovery of copious amounts of water in the Universe have revolutionized our understanding of how galaxies form and evolve and how planetary systems like our own may originate. However, even Hersche ...
Mapping the Pathways of Galaxy Transformation Across Time and
... activity, stellar mass assembly, and morphology. In this talk, I will illustrate the relation between global properties and kpc-scale substructures of galaxies out to z∼2. Using combined high resolution data from the Hubble Space Telescope and long exposure spectroscopic observations with the Keck t ...
... activity, stellar mass assembly, and morphology. In this talk, I will illustrate the relation between global properties and kpc-scale substructures of galaxies out to z∼2. Using combined high resolution data from the Hubble Space Telescope and long exposure spectroscopic observations with the Keck t ...
What, and Why, is the International Astronomical Union?
... merge with Solar Physics (Comm. 12), leaving the set shown in the table at the time of the 1925 General Assembly, where two more, dealing with the structure of the Milky Way and diffuse matter in space were formed. Much of what the Commissions did in the early days was not just useful but essential ...
... merge with Solar Physics (Comm. 12), leaving the set shown in the table at the time of the 1925 General Assembly, where two more, dealing with the structure of the Milky Way and diffuse matter in space were formed. Much of what the Commissions did in the early days was not just useful but essential ...
Carbon-enhanced metal-poor stars in dwarf galaxies
... [Fe/H]≤ −3 have been observed, and 10 of them are found to be CEMP-no stars. This gives FCEMP (< −3) ≈ 42%. However, when we consider individual dwarf galaxies, the fractions are highly variable. The carbon measurements in the least luminous ultra-faint dwarf galaxies, log(L/L# ) < 4.0 (shown in Fig ...
... [Fe/H]≤ −3 have been observed, and 10 of them are found to be CEMP-no stars. This gives FCEMP (< −3) ≈ 42%. However, when we consider individual dwarf galaxies, the fractions are highly variable. The carbon measurements in the least luminous ultra-faint dwarf galaxies, log(L/L# ) < 4.0 (shown in Fig ...
X-ray Binaries in Nearby Galaxies
... other galaxies: discovered in the LMC/SMC, M31, and another ~15 galaxies (all spirals) a handful of point X-ray sources (< 10) long-standing problems with low angular resolution and source confusion > XLF reliably constructed only for M31 and M101 > 'super-Eddington' sources were tentatively identif ...
... other galaxies: discovered in the LMC/SMC, M31, and another ~15 galaxies (all spirals) a handful of point X-ray sources (< 10) long-standing problems with low angular resolution and source confusion > XLF reliably constructed only for M31 and M101 > 'super-Eddington' sources were tentatively identif ...
Astronomy and the Bible
... When dark nebula (mostly dust) collide with emission nebula (florescent regions of gas) images like the Eagle nebula form. The result is whitish areas appearing at the edges of the dark ‘fingers’ of dust. Gases at such temperatures (10,000 K) will quickly disperse. Images taken by the European S ...
... When dark nebula (mostly dust) collide with emission nebula (florescent regions of gas) images like the Eagle nebula form. The result is whitish areas appearing at the edges of the dark ‘fingers’ of dust. Gases at such temperatures (10,000 K) will quickly disperse. Images taken by the European S ...
AST1100 Lecture Notes
... The magnitude M which is based on flux integrated over all wavelengths is called the bolometric magnitude. The visual magnitude MV on the other hand, is based on the flux over a wavelength region defined by a filter function SV (λ). The filter function is a function which is centered at λ = 550nm wi ...
... The magnitude M which is based on flux integrated over all wavelengths is called the bolometric magnitude. The visual magnitude MV on the other hand, is based on the flux over a wavelength region defined by a filter function SV (λ). The filter function is a function which is centered at λ = 550nm wi ...
Infrared Properties of Star-Forming Dwarf Galaxies. I. Dwarf Irregular
... The observing facilities to which we had access imposed two additional criteria on our sample: 3. An apparent size smaller than 30 , possible to image by both facilities used for this work. 4. Target visibility from each facility during the observing time granted. We identified 34 dwarf galaxies th ...
... The observing facilities to which we had access imposed two additional criteria on our sample: 3. An apparent size smaller than 30 , possible to image by both facilities used for this work. 4. Target visibility from each facility during the observing time granted. We identified 34 dwarf galaxies th ...
Probing nuclear activity versus star formation at z ∼ 0.8 using near
... this is the largest compilation of NIR spectra of active galactic nuclei (AGN) at this redshift. The data were obtained using the multi-object spectroscopic mode of the Long-slit Intermediate Resolution Infrared Spectrograph (LIRIS) at the 4.2 m William Herschel Telescope (WHT). These galaxies are r ...
... this is the largest compilation of NIR spectra of active galactic nuclei (AGN) at this redshift. The data were obtained using the multi-object spectroscopic mode of the Long-slit Intermediate Resolution Infrared Spectrograph (LIRIS) at the 4.2 m William Herschel Telescope (WHT). These galaxies are r ...
Chapter 25 - Haiku Learning
... stars orbit each other. These pairs of stars, pulled toward each other by gravity, are called binary stars. More than 50 percent of the stars in the universe may occur in pairs or multiples. Binary stars are used to determine the star property most difficult to calculate—its mass. The mass of a body ...
... stars orbit each other. These pairs of stars, pulled toward each other by gravity, are called binary stars. More than 50 percent of the stars in the universe may occur in pairs or multiples. Binary stars are used to determine the star property most difficult to calculate—its mass. The mass of a body ...
Pluto_FIT
... New satellite discovery observations • Hubble proposal designed by Weaver, Stern, et al., initially rejected, then accepted when STIS died • Advanced Camera for Surveys (ACS) Wide Field Channel (WFC) covers entire orbital stability zone • Pluto-Charon near chip gap: peek-a-boo! • 4 long exposures o ...
... New satellite discovery observations • Hubble proposal designed by Weaver, Stern, et al., initially rejected, then accepted when STIS died • Advanced Camera for Surveys (ACS) Wide Field Channel (WFC) covers entire orbital stability zone • Pluto-Charon near chip gap: peek-a-boo! • 4 long exposures o ...
- ALMA Observatory
... by interferometry systems such as the Very Large Array (VLA) in New Mexico with 27 antennas and ALMA, which was inaugurated in 2013 and is now the largest and most modern array in the world. ...
... by interferometry systems such as the Very Large Array (VLA) in New Mexico with 27 antennas and ALMA, which was inaugurated in 2013 and is now the largest and most modern array in the world. ...
J: Chapter 4: Stars and Galaxies
... its parallax—the apparent shift in the position of an object when viewed from two different positions. Extend your arm and look at your thumb first with your left eye closed and then with your right eye closed, as the girl in Figure 3A is doing. Your thumb appears to change position with respect to ...
... its parallax—the apparent shift in the position of an object when viewed from two different positions. Extend your arm and look at your thumb first with your left eye closed and then with your right eye closed, as the girl in Figure 3A is doing. Your thumb appears to change position with respect to ...
(Science 2012) Gal-Yam
... light curve from (65), the type IIb SN 2011dh (78), and the prototypical type II-P SN −22.7 mag, marking it as the most With extreme luminosities ex- 1999em (79). All data are in the observed R band (80). luminous SN detected until then tending over tens of days (Fig. 1) (11). SN 2005ap is the first ...
... light curve from (65), the type IIb SN 2011dh (78), and the prototypical type II-P SN −22.7 mag, marking it as the most With extreme luminosities ex- 1999em (79). All data are in the observed R band (80). luminous SN detected until then tending over tens of days (Fig. 1) (11). SN 2005ap is the first ...
Hubble Deep Field
The Hubble Deep Field (HDF) is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope. It covers an area 2.5 arcminutes across, about one 24-millionth of the whole sky, which is equivalent in angular size to a 65 mm tennis ball at a distance of 100 metres. The image was assembled from 342 separate exposures taken with the Space Telescope's Wide Field and Planetary Camera 2 over ten consecutive days between December 18 and December 28, 1995.The field is so small that only a few foreground stars in the Milky Way lie within it; thus, almost all of the 3,000 objects in the image are galaxies, some of which are among the youngest and most distant known. By revealing such large numbers of very young galaxies, the HDF has become a landmark image in the study of the early universe, with the associated scientific paper having received over 900 citations by the end of 2014.Three years after the HDF observations were taken, a region in the south celestial hemisphere was imaged in a similar way and named the Hubble Deep Field South. The similarities between the two regions strengthened the belief that the universe is uniform over large scales and that the Earth occupies a typical region in the Universe (the cosmological principle). A wider but shallower survey was also made as part of the Great Observatories Origins Deep Survey. In 2004 a deeper image, known as the Hubble Ultra-Deep Field (HUDF), was constructed from a few months of light exposure. The HUDF image was at the time the most sensitive astronomical image ever made at visible wavelengths, and it remained so until the Hubble Extreme Deep Field (XDF) was released in 2012.