Chapter 26
... million to 10 billion stars, making them larger than dwarf ellipticals but smaller than spirals. ...
... million to 10 billion stars, making them larger than dwarf ellipticals but smaller than spirals. ...
Stellar Continua
... I. The Paschen Continuum • The Paschen continuum slope (B-V) is a good temperature indicator • Varies smoothly with changing temperature • Slope is negative (blue is brighter) for hot stars and positive (visual is brighter) for cooler stars • B-V works as a temperature indicator from 3500K to 9000K ...
... I. The Paschen Continuum • The Paschen continuum slope (B-V) is a good temperature indicator • Varies smoothly with changing temperature • Slope is negative (blue is brighter) for hot stars and positive (visual is brighter) for cooler stars • B-V works as a temperature indicator from 3500K to 9000K ...
The Official Magazine of the University Of St Andrews Astronomical Society 1
... For starters, a small band of the Milky Way runs right through the centre of Perseus, making it a lovely sight through binoculars. And while you’ve got them out, check out The Double Cluster ( NGC 869 and NGC 884), two open clusters right next to each other between the top of Perseus and Cassiopeia. ...
... For starters, a small band of the Milky Way runs right through the centre of Perseus, making it a lovely sight through binoculars. And while you’ve got them out, check out The Double Cluster ( NGC 869 and NGC 884), two open clusters right next to each other between the top of Perseus and Cassiopeia. ...
PowerPoint
... • Doppler shift– toward (blue) and away (red) • Quantum mechanics– electrons can be wave-like – Electrons around nucleus have certain orbits– defines emission and absorption of each atom – When excited, atoms emit certain lines (like in class)– fingerprint or barcode of atom ...
... • Doppler shift– toward (blue) and away (red) • Quantum mechanics– electrons can be wave-like – Electrons around nucleus have certain orbits– defines emission and absorption of each atom – When excited, atoms emit certain lines (like in class)– fingerprint or barcode of atom ...
The First Thousand Exoplanets
... and only detected by the Doppler method, the 50 light years distant star was bright enough to be visible to the naked eye. News of the discovery must have been rather bittersweet for Geoff Marcy and Paul Butler, five thousand miles away in California. Marcy had been running an experiment for eight y ...
... and only detected by the Doppler method, the 50 light years distant star was bright enough to be visible to the naked eye. News of the discovery must have been rather bittersweet for Geoff Marcy and Paul Butler, five thousand miles away in California. Marcy had been running an experiment for eight y ...
The Rocket Science of Launching Stellar Disks
... – Driven by line-scattering of star’s radiation – Rotation can lead to Wind Compressed Disk (WCD) – But still lacks angular momentum for orbit ...
... – Driven by line-scattering of star’s radiation – Rotation can lead to Wind Compressed Disk (WCD) – But still lacks angular momentum for orbit ...
Climbing the Distance Ladder
... 1) Distances within the Solar System can be measured using radar. 2) Distances of nearby stars can be measured using parallax. 3) Greater distances can be measured ...
... 1) Distances within the Solar System can be measured using radar. 2) Distances of nearby stars can be measured using parallax. 3) Greater distances can be measured ...
Star Formation in Bok Globules - European Southern Observatory
... is a huge, faintly luminous H 1I region spread over more than 30 degrees of the southern sky. At a distance of roughly 450 pc this corresponds to a radius of about 125 pc, making the Gum Nebula one of the largest structures known in our galaxy. Near its center are several objects which tagether prod ...
... is a huge, faintly luminous H 1I region spread over more than 30 degrees of the southern sky. At a distance of roughly 450 pc this corresponds to a radius of about 125 pc, making the Gum Nebula one of the largest structures known in our galaxy. Near its center are several objects which tagether prod ...
Apr 2017 - Bays Mountain Park
... celestial event. Of course, I am talking about the Total Solar Eclipse coming up on August 21st. Whether you are accompanying Bays Mountain on their excursion or taking a trip of your own, most of us plan on spending that day staring at our very own star. Of course, we are all going to do it the saf ...
... celestial event. Of course, I am talking about the Total Solar Eclipse coming up on August 21st. Whether you are accompanying Bays Mountain on their excursion or taking a trip of your own, most of us plan on spending that day staring at our very own star. Of course, we are all going to do it the saf ...
Spectra of Star Clusters
... B2 dwarf (10 M~) lasts F0 dwarf (2 M~) lasts M0 dwarf (.5 M~) lasts ...
... B2 dwarf (10 M~) lasts F0 dwarf (2 M~) lasts M0 dwarf (.5 M~) lasts ...
The Milky Way - Montgomery College
... Measuring the Mass of the Black Hole in the Center of the Milky Way By following the orbits of individual stars near the center of the Milky Way, the mass of the central black hole could be determined to be ~ 2.6 million ...
... Measuring the Mass of the Black Hole in the Center of the Milky Way By following the orbits of individual stars near the center of the Milky Way, the mass of the central black hole could be determined to be ~ 2.6 million ...
MHD_of_Accretion_Disks
... binary systems. In a binary system, the higher mass star will evolve faster and will eventually become a compact object - either a white dwarf star, a neutron star, or black hole. When the lower mass star later evolves into an expansion phase, it may be so close to the compact star that its outer at ...
... binary systems. In a binary system, the higher mass star will evolve faster and will eventually become a compact object - either a white dwarf star, a neutron star, or black hole. When the lower mass star later evolves into an expansion phase, it may be so close to the compact star that its outer at ...
– 1 – 1. Historical Notes for Ay 123 1.1.
... Fig. 3.— The proper motions of the bulge stars and of the stars in the globular cluster M4 are shown in Galactic coordinates. These were deduced from multi-epoch HST images. A single extragalactic point source was chosen as the origin. This is Fig.6 of Bedin, Piotto, King & Anderson, 2003, AJ, 126, ...
... Fig. 3.— The proper motions of the bulge stars and of the stars in the globular cluster M4 are shown in Galactic coordinates. These were deduced from multi-epoch HST images. A single extragalactic point source was chosen as the origin. This is Fig.6 of Bedin, Piotto, King & Anderson, 2003, AJ, 126, ...
neutron star.
... — Use orbital properties of companion — Measure velocity and distance of orbiting gas • It’s a black hole if it’s not a star and its mass exceeds the neutron star limit (~3 MSun). ...
... — Use orbital properties of companion — Measure velocity and distance of orbiting gas • It’s a black hole if it’s not a star and its mass exceeds the neutron star limit (~3 MSun). ...
Answer to question 1 - Northwestern University
... A spiral galaxy is one that has a spiral shape, and these enough atomic hydrogen in them to allow a detection of the 21 cm line. This image of NGC 628 (M-74) was obtained by the 8.1-meter Gemini North Telescope on Mauna Kea Hawaii using the newly commissioned Gemini Multi-Object Spectrograph. To mak ...
... A spiral galaxy is one that has a spiral shape, and these enough atomic hydrogen in them to allow a detection of the 21 cm line. This image of NGC 628 (M-74) was obtained by the 8.1-meter Gemini North Telescope on Mauna Kea Hawaii using the newly commissioned Gemini Multi-Object Spectrograph. To mak ...
Doppler Effect
... http://astro.berkeley.edu/~gmarcy/women/rubin.html http://nssdc.gsfc.nasa.gov/image/astro/hst_ngc4414_9925.jpg ...
... http://astro.berkeley.edu/~gmarcy/women/rubin.html http://nssdc.gsfc.nasa.gov/image/astro/hst_ngc4414_9925.jpg ...
An interesting nebular object in LDN 288
... (b in Fig.5b). There is another star with a jet in its vicinity (object c in the Fig.5b). c. SNO 69 [3] (see Fig.5c). This looks like a trapezium-like system, consisting of four stars. There are spiral jets, at the ends of which there are condensations. It seems that not only the jets, but also the ...
... (b in Fig.5b). There is another star with a jet in its vicinity (object c in the Fig.5b). c. SNO 69 [3] (see Fig.5c). This looks like a trapezium-like system, consisting of four stars. There are spiral jets, at the ends of which there are condensations. It seems that not only the jets, but also the ...
Lecture 10: The Hertzsprung
... There is a mass-luminosity relation on the main sequence. We can use that + a sample of stars where we get all the stars within a certain distance of the Sun to figure out how many stars of what masses are out there. Answer: Lots of low-mass stars! Very few high-mass stars. This is something our the ...
... There is a mass-luminosity relation on the main sequence. We can use that + a sample of stars where we get all the stars within a certain distance of the Sun to figure out how many stars of what masses are out there. Answer: Lots of low-mass stars! Very few high-mass stars. This is something our the ...
10 Stellar Evolution - Journigan-wiki
... across the black hole’s event horizon and through. In general relativity, it is a general term for a boundary in space-time, defined with respect to an observer, beyond which events cannot affect the observer. Light emitted beyond the horizon can never reach the observer, and anything that passes th ...
... across the black hole’s event horizon and through. In general relativity, it is a general term for a boundary in space-time, defined with respect to an observer, beyond which events cannot affect the observer. Light emitted beyond the horizon can never reach the observer, and anything that passes th ...
Document
... • Ecliptic – putting together the last 4 LTs – How does the daily motion of the Celestial Sphere (rotation of the Earth!) relate to the daily/monthly changes due to Earth’s orbit? ...
... • Ecliptic – putting together the last 4 LTs – How does the daily motion of the Celestial Sphere (rotation of the Earth!) relate to the daily/monthly changes due to Earth’s orbit? ...
Cygnus (constellation)
Cygnus /ˈsɪɡnəs/ is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan. The swan is one of the most recognizable constellations of the northern summer and autumn, it features a prominent asterism known as the Northern Cross (in contrast to the Southern Cross). Cygnus was among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations.Cygnus contains Deneb, one of the brightest stars in the night sky and one corner of the Summer Triangle, as well as some notable X-ray sources and the giant stellar association of Cygnus OB2. One of the stars of this association, NML Cygni, is one of the largest stars currently known. The constellation is also home to Cygnus X-1, a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole. Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, the patch is the area around Cygnus. In addition, most of the eastern part of Cygnus is dominated by the Hercules–Corona Borealis Great Wall, a giant galaxy filament that is the largest known structure in the observable universe; covering most of the northern sky.