Cepheid Variable Star RS Puppis
... could be determined within our solar system and out to some of the nearest stars, but astronomers did not have a reliable way to measure the distances to remote stars or nebulae. As far as they could tell, our Milky Way Galaxy was the entire universe. Then, in 1912, astronomer Henrietta Swan Leavitt ...
... could be determined within our solar system and out to some of the nearest stars, but astronomers did not have a reliable way to measure the distances to remote stars or nebulae. As far as they could tell, our Milky Way Galaxy was the entire universe. Then, in 1912, astronomer Henrietta Swan Leavitt ...
A magnetic communication scenario for hot Jupiters
... the distance from the stellar surface, from which all other quantities are computed. Whereas M , R , P , a, and Porb can be taken more or less from observations, the stellar mass flux, Fm , must be obtained from theoretical considerations. We constrain it here by scaling today’s solar mass flux, ...
... the distance from the stellar surface, from which all other quantities are computed. Whereas M , R , P , a, and Porb can be taken more or less from observations, the stellar mass flux, Fm , must be obtained from theoretical considerations. We constrain it here by scaling today’s solar mass flux, ...
Spectral Variations of Three RV Tauri Stars Donald K. Walter
... The lack of photometric data on and near the dates of our spectroscopic observations limited us to use of the absolute magnitude based on the luminosity class from our spectra. The point in the upper right is actually two observations closely spaced in time and superimposed on one ...
... The lack of photometric data on and near the dates of our spectroscopic observations limited us to use of the absolute magnitude based on the luminosity class from our spectra. The point in the upper right is actually two observations closely spaced in time and superimposed on one ...
Extrasolar planets - Astronomisk Ungdom
... finished its cycle or if it has moved out of the range in which the telescope observed the star. As mentioned above a macula can disappear and reappear. However, planets do not vanish from their orbit without a trace or a caveat, except if it is a free planet passing the star, but those are rare and ...
... finished its cycle or if it has moved out of the range in which the telescope observed the star. As mentioned above a macula can disappear and reappear. However, planets do not vanish from their orbit without a trace or a caveat, except if it is a free planet passing the star, but those are rare and ...
silicon and oxygen abundances in planet-host stars
... no such differences in their sample for alpha- and iron-peak elements. They observe no difference in the overall trends of [X/Fe] between planet hosts and their volume-limited sample of stars without any known planetary-mass companions. Based on their results, stars with planets appear to be indisti ...
... no such differences in their sample for alpha- and iron-peak elements. They observe no difference in the overall trends of [X/Fe] between planet hosts and their volume-limited sample of stars without any known planetary-mass companions. Based on their results, stars with planets appear to be indisti ...
ANTARES - National Optical Astronomy Observatory
... The resources to conduct observational follow up of astronomical objects are limited, especially when it comes to transient objects that are only available for a short period. In addition, many resources are scheduled in ways not necessarily favorable to time-domain astronomy. The so-called classica ...
... The resources to conduct observational follow up of astronomical objects are limited, especially when it comes to transient objects that are only available for a short period. In addition, many resources are scheduled in ways not necessarily favorable to time-domain astronomy. The so-called classica ...
EX PLANET E - Institute of Physics
... The practical activity Students use thermometers to measure the temperature at different distances from a radiant heater. They should start at a good distance (around 70 cm) from the heater and move towards it. Warn them not allow their thermometers to get hotter than 100°C. Students will probably r ...
... The practical activity Students use thermometers to measure the temperature at different distances from a radiant heater. They should start at a good distance (around 70 cm) from the heater and move towards it. Warn them not allow their thermometers to get hotter than 100°C. Students will probably r ...
Milky Way Kinematics, or how we discovered the geometry and
... Like planets going around sun (remember Kepler’s laws?) So our galactic disk is rotating differentially. Rotation curve: plot orbital velocity trend with radius. For solid body, like merry-go-round, get straight line. For solar system, with Kepler’s laws and nearly all mass at center, get rapidly fa ...
... Like planets going around sun (remember Kepler’s laws?) So our galactic disk is rotating differentially. Rotation curve: plot orbital velocity trend with radius. For solid body, like merry-go-round, get straight line. For solar system, with Kepler’s laws and nearly all mass at center, get rapidly fa ...
TMT Scientific Information Brochure
... uncovered. Researchers will be able to use TMT to study supermassive black holes (SMBH) across the entire Hubble sequence and study their demography as a function of environment. TMT observations will also extend dynamical measurements of massive black holes to z~0.4 and SMBHs throughout the Univers ...
... uncovered. Researchers will be able to use TMT to study supermassive black holes (SMBH) across the entire Hubble sequence and study their demography as a function of environment. TMT observations will also extend dynamical measurements of massive black holes to z~0.4 and SMBHs throughout the Univers ...
Unit 1
... • Light from galaxies always appears fuzzy and diffuse, due to the vast separation between the Sun and the observed galaxy, as well as the separation between the stars of that galaxy! – The paleness of visible light from distant galaxies is called the surface brightness. ...
... • Light from galaxies always appears fuzzy and diffuse, due to the vast separation between the Sun and the observed galaxy, as well as the separation between the stars of that galaxy! – The paleness of visible light from distant galaxies is called the surface brightness. ...
Behaviour of elements from lithium to europium in stars with and
... Its abundance is apparently lower in stars with planetary systems than in those without (Gonzalez & Laws 2000; Gonzalez 2008; Gonzalez, Carlson & Tobin 2010; Israelian et al. 2004, 2009; Delgado Mena et al. 2014; Figueira et al. 2014; Delgado Mena et al. 2015). In particular, Delgado Mena et al. (20 ...
... Its abundance is apparently lower in stars with planetary systems than in those without (Gonzalez & Laws 2000; Gonzalez 2008; Gonzalez, Carlson & Tobin 2010; Israelian et al. 2004, 2009; Delgado Mena et al. 2014; Figueira et al. 2014; Delgado Mena et al. 2015). In particular, Delgado Mena et al. (20 ...
L157 EXTRASOLAR GIANT PLANETS UNDER STRONG STELLAR
... function of frequency and depth. In addition, the reflected light cannot easily be separated from heating or the planet’s internal flux. For example, the monochromatic albedo, which we define as the ratio of reflected planetary flux to incident flux at a specific frequency, is as high as 0.45 around ...
... function of frequency and depth. In addition, the reflected light cannot easily be separated from heating or the planet’s internal flux. For example, the monochromatic albedo, which we define as the ratio of reflected planetary flux to incident flux at a specific frequency, is as high as 0.45 around ...
Chapter 14 Stellar Corpses Stellar Corpses White Dwarfs White
... into space), a white dwarf is mainly carbon and oxygen with a thin hydrogen/helium surface layer • Initially, with a surface temperature of about 150,000 K, a white dwarf will cool over time (many billions of years) until it becomes a black dwarf emitting no visible light ...
... into space), a white dwarf is mainly carbon and oxygen with a thin hydrogen/helium surface layer • Initially, with a surface temperature of about 150,000 K, a white dwarf will cool over time (many billions of years) until it becomes a black dwarf emitting no visible light ...
Star formation PowerPoint
... • The protostar continues to collapse; when the core is dense and hot enough, fusion begins • The star continues to collapse until the inward force of gravity is balanced by the outward pressure from the core. The star is now on the main sequence • More massive stars follow the same process, but mor ...
... • The protostar continues to collapse; when the core is dense and hot enough, fusion begins • The star continues to collapse until the inward force of gravity is balanced by the outward pressure from the core. The star is now on the main sequence • More massive stars follow the same process, but mor ...
Exoanatomy - Jothi's World
... number of neural circuits. Furthermore, the more complex the manipulative possibilities of these “hands”, the more neuronal processing capacity they will require (cf. the anatomy of the brain along the rift). Thus, a four-armed alien would need a significantly larger brain than a two-armed one, and ...
... number of neural circuits. Furthermore, the more complex the manipulative possibilities of these “hands”, the more neuronal processing capacity they will require (cf. the anatomy of the brain along the rift). Thus, a four-armed alien would need a significantly larger brain than a two-armed one, and ...
Carbon Stars - The OzSky Star Safari
... area of the HR diagram that we call an 'instability strip' or an 'instability region'. When the star is in this area of the diagram it will become a variable star, one that varies in brightness over time.“ • “Mira stars are red giants (which began as low mass stars), with a temperature less than ...
... area of the HR diagram that we call an 'instability strip' or an 'instability region'. When the star is in this area of the diagram it will become a variable star, one that varies in brightness over time.“ • “Mira stars are red giants (which began as low mass stars), with a temperature less than ...
Local group
... • Assumptions: galaxies gas is well mixed, no infall or outflow, high mass stars return metals to ISM faster than time to form new stars) Mtotal=Mgas+Mstar=constant (Mbaryons) ; Mhmass of heavy elements in gas =ZMgas dM'stars =total mass made into stars, dM''stars =amount of mass instantaneously ret ...
... • Assumptions: galaxies gas is well mixed, no infall or outflow, high mass stars return metals to ISM faster than time to form new stars) Mtotal=Mgas+Mstar=constant (Mbaryons) ; Mhmass of heavy elements in gas =ZMgas dM'stars =total mass made into stars, dM''stars =amount of mass instantaneously ret ...
Surveying the Stars
... A star’s full classification includes spectral type (based on spectral line identities) and luminosity class (based on spectral line shapes, which are related to the size of the star) ...
... A star’s full classification includes spectral type (based on spectral line identities) and luminosity class (based on spectral line shapes, which are related to the size of the star) ...
Astronomical Filters on Skynet Telescopes
... example being the temperature of a star. Cooler stars look redder, and hotter stars look bluer. By quantifying how red or blue a star looks, we can relate this measurement to its temperature, which can then give us some insight into other properties like its mass and age. What filters do and how the ...
... example being the temperature of a star. Cooler stars look redder, and hotter stars look bluer. By quantifying how red or blue a star looks, we can relate this measurement to its temperature, which can then give us some insight into other properties like its mass and age. What filters do and how the ...
GRADE 12A: Physics 7
... • The nearest major galaxy to the Milky Way is the Andromeda galaxy (Andromeda nebula), which is also a spiral. • Even the nearest galaxy lies at a distance of a few million light-years. Light reaching us has been in transit for this time, so it carries information about the galaxy as it was a few m ...
... • The nearest major galaxy to the Milky Way is the Andromeda galaxy (Andromeda nebula), which is also a spiral. • Even the nearest galaxy lies at a distance of a few million light-years. Light reaching us has been in transit for this time, so it carries information about the galaxy as it was a few m ...
The Death of Stars
... c. they cannot heat their centers hot enough. d. they contain strong magnetic fields. e. they never use up their hydrogen. 2. A planetary nebula is a. the expelled outer envelope of a medium mass star. b. produced by a supernova explosion. c. produced by a nova explosion. d. a nebula within which pl ...
... c. they cannot heat their centers hot enough. d. they contain strong magnetic fields. e. they never use up their hydrogen. 2. A planetary nebula is a. the expelled outer envelope of a medium mass star. b. produced by a supernova explosion. c. produced by a nova explosion. d. a nebula within which pl ...