Planetary Nebula
... Low Mass StarsIf a Star has a mass of less then 4 stellar masses, then the Star will become a Red Giant when it has used most of its Hydrogen in the process of nuclear fusion. This Red Giant will lose its mass by gently ejecting its outer layers to form a Planetary Nebula. There are between 20,000 ...
... Low Mass StarsIf a Star has a mass of less then 4 stellar masses, then the Star will become a Red Giant when it has used most of its Hydrogen in the process of nuclear fusion. This Red Giant will lose its mass by gently ejecting its outer layers to form a Planetary Nebula. There are between 20,000 ...
SIMULATIONS
... Sne II E_II = 10^51 (mass/10 M_sun) erg injected in the ISM after 10 Myear a 8 – 40 M_sun star is formed Sne Blast wave in adiabatic expansion if parsec-scale resolution (McKee & Ostriker 1977; Stinson et al. 2006; Brook 2010 . 2011) ...
... Sne II E_II = 10^51 (mass/10 M_sun) erg injected in the ISM after 10 Myear a 8 – 40 M_sun star is formed Sne Blast wave in adiabatic expansion if parsec-scale resolution (McKee & Ostriker 1977; Stinson et al. 2006; Brook 2010 . 2011) ...
stellar spectra instructor notes
... It is important to consider where stellar spectra originate, namely in the hot, gaseous atmospheres that constitute the outermost thin layers of all stars. Visible light penetrates not very deeply into stellar atmospheres, but goes deep enough to pass through the cool surface layers at the top of th ...
... It is important to consider where stellar spectra originate, namely in the hot, gaseous atmospheres that constitute the outermost thin layers of all stars. Visible light penetrates not very deeply into stellar atmospheres, but goes deep enough to pass through the cool surface layers at the top of th ...
Astronomy Astrophysics Massive open star clusters using the VVV survey &
... The photometric data used in this work are part of the ESO Public Survey VVV, which observes with the VIRCAM at the VISTA telescope. VIRCAM has a 16-detector array (each detector with a 2048 × 2048 pixel size), and a pixel scale of 0.34 arcsec pix−1 . The gaps between the detectors are covered with ...
... The photometric data used in this work are part of the ESO Public Survey VVV, which observes with the VIRCAM at the VISTA telescope. VIRCAM has a 16-detector array (each detector with a 2048 × 2048 pixel size), and a pixel scale of 0.34 arcsec pix−1 . The gaps between the detectors are covered with ...
1 - Uplift North Hills Prep
... ● temperature of the universe immediately after the Big Bang was very high; as it expanded it cooled down; ● the wavelength of the CMB corresponds to a temperature consistent with ...
... ● temperature of the universe immediately after the Big Bang was very high; as it expanded it cooled down; ● the wavelength of the CMB corresponds to a temperature consistent with ...
worksheet
... How do Astronomers know how much matter is in a galaxy? How do they know dark matter exists? In this project, you will use some real galaxy data and make some measurements in the way that astronomers do. ...
... How do Astronomers know how much matter is in a galaxy? How do they know dark matter exists? In this project, you will use some real galaxy data and make some measurements in the way that astronomers do. ...
Document
... ● temperature of the universe immediately after the Big Bang was very high; as it expanded it cooled down; ● the wavelength of the CMB corresponds to a temperature consistent with ...
... ● temperature of the universe immediately after the Big Bang was very high; as it expanded it cooled down; ● the wavelength of the CMB corresponds to a temperature consistent with ...
How do we describe motion? - Department of Physics and Astronomy
... • The same laws are valid throughout the universe • The laws of motions are an essential part of our technological society. The design of spaceships, airplanes, and even cars and skyscrapers, based on Newton’s laws. • Using these laws, Astronomers can understand how structures evolve in space usin ...
... • The same laws are valid throughout the universe • The laws of motions are an essential part of our technological society. The design of spaceships, airplanes, and even cars and skyscrapers, based on Newton’s laws. • Using these laws, Astronomers can understand how structures evolve in space usin ...
The Doppler Effect - RanelaghALevelPhysics
... positive speed; moving away from the observer the speed is negative. • If the object is moving away, the frequency is lower so that ∆f is negative. The wavelength will be longer. • If the object is coming towards the observer, the frequency is higher, so ∆f will be positive. The wavelength will be s ...
... positive speed; moving away from the observer the speed is negative. • If the object is moving away, the frequency is lower so that ∆f is negative. The wavelength will be longer. • If the object is coming towards the observer, the frequency is higher, so ∆f will be positive. The wavelength will be s ...
Space astrometry 2: Scientific results from Hipparcos
... • Ursa Major: 0.3 Gyr (Eggen 1998, Chupina et al 2001, King et al 2003) • HR 1614: 2-6 Gyr (Eggen 1998, Feltzing & Holmberg 2000) ...
... • Ursa Major: 0.3 Gyr (Eggen 1998, Chupina et al 2001, King et al 2003) • HR 1614: 2-6 Gyr (Eggen 1998, Feltzing & Holmberg 2000) ...
Document
... Venn & Lambert (2008) have argued that this may not be the case. Peculiar stars such as post AGB stars and l Boo stars have iron abundances as low as [Fe/H] ~ –5. These are thought to be due to the separation of gas and dust beyond the stellar surface followed by an accretion of the dust-depleted g ...
... Venn & Lambert (2008) have argued that this may not be the case. Peculiar stars such as post AGB stars and l Boo stars have iron abundances as low as [Fe/H] ~ –5. These are thought to be due to the separation of gas and dust beyond the stellar surface followed by an accretion of the dust-depleted g ...
The Sculptor dwarf irregular galaxy SDIG: present and past
... model fits to optical surface brightness profiles, we conclude that the peak colour excess owing to internal dust is less than 0.08 mag, and this is within the central region covering a few arcseconds (Section 4.2.2). Given the many assumptions, the small area affected by dust (diameter < 8 arcsec) ...
... model fits to optical surface brightness profiles, we conclude that the peak colour excess owing to internal dust is less than 0.08 mag, and this is within the central region covering a few arcseconds (Section 4.2.2). Given the many assumptions, the small area affected by dust (diameter < 8 arcsec) ...
spiral nebulae
... If this object is indeed comparable to our Milky Way, it must be about one hundred thousand light years across. The path followed by an object travelling around and around the centre must be tens or hundreds of thousands of light years in length.` To give rise to the ‘observed’ rotational motions, o ...
... If this object is indeed comparable to our Milky Way, it must be about one hundred thousand light years across. The path followed by an object travelling around and around the centre must be tens or hundreds of thousands of light years in length.` To give rise to the ‘observed’ rotational motions, o ...
March 2010 - Pomona Valley Amateur Astronomers
... Sometimes those aliens say they're from the Andromeda Galaxy (M31) some three million light years away. Perhaps this is because it's most distant object that can be seen by the unaided eye. In a telescope it reveals dwarf companions of its own (M110 and M32). Studying the Andromeda Galaxy is like st ...
... Sometimes those aliens say they're from the Andromeda Galaxy (M31) some three million light years away. Perhaps this is because it's most distant object that can be seen by the unaided eye. In a telescope it reveals dwarf companions of its own (M110 and M32). Studying the Andromeda Galaxy is like st ...
Pre-Lab
... category including gaseous nebulae, planetary nebulae, hazy star clusters, and faint lens-shaped formations. If these objects were nearby, with distances comparable to those of observable stars, they would have to be luminous clouds of gas within our Galaxy. If they were very remote, far beyond the ...
... category including gaseous nebulae, planetary nebulae, hazy star clusters, and faint lens-shaped formations. If these objects were nearby, with distances comparable to those of observable stars, they would have to be luminous clouds of gas within our Galaxy. If they were very remote, far beyond the ...
Properties of Stars - Montana State University Extended University
... strength. As a way to check this, the spectra from all of the gas clouds from which stars form show approximately the same abundances everywhere. Measuring the strength of the hydrogen absorption lines is usually the first step for determining a star's temperature. If the star is too hot or too cold ...
... strength. As a way to check this, the spectra from all of the gas clouds from which stars form show approximately the same abundances everywhere. Measuring the strength of the hydrogen absorption lines is usually the first step for determining a star's temperature. If the star is too hot or too cold ...
THE INNER CORE OF A NEUTRON STAR Part 1
... Abstract: Neutron stars are formed by super compaction that result from the gravitational collapse of a massive star after a supernova. Neutron star composition makes it so heavy that its density is at least twice the mass of Earth’s Sun. Current thinking subscribes to the possibility that a neutron ...
... Abstract: Neutron stars are formed by super compaction that result from the gravitational collapse of a massive star after a supernova. Neutron star composition makes it so heavy that its density is at least twice the mass of Earth’s Sun. Current thinking subscribes to the possibility that a neutron ...
feps_jan_2007_aas - The Formation & Evolution of Planetary
... stars with ages from 3 Myr to 3 Gyr in order to construct spectral energy distributions (SEDs) from 3-160 microns, as well as obtain high resolution midinfrared spectra. The SEDs yield constraints on the geometric distribution and mass of dust while the spectra enable a search for emission from gas ...
... stars with ages from 3 Myr to 3 Gyr in order to construct spectral energy distributions (SEDs) from 3-160 microns, as well as obtain high resolution midinfrared spectra. The SEDs yield constraints on the geometric distribution and mass of dust while the spectra enable a search for emission from gas ...
Abundance Anomalies In Tidal Disruption Events
... Figure 1 shows that low mass stars simply live too long to develop abundance anomalies given the age of the universe. Over its main sequence life time, an 0.5M⊙ star becomes significantly enhanced in helium and nitrogen and depleted in carbon, but 10 Gyr represents less than 10% of its overall lifet ...
... Figure 1 shows that low mass stars simply live too long to develop abundance anomalies given the age of the universe. Over its main sequence life time, an 0.5M⊙ star becomes significantly enhanced in helium and nitrogen and depleted in carbon, but 10 Gyr represents less than 10% of its overall lifet ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.