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What is absolute bolometric magnitude?
Absolute magnitude is the brightness of an object (star, galaxy, etc.) from a standard distance."Bolometric" means that the entire energy output is calculated - not just visible light.
What type of star is hamal?
From Wikipedia: "It is estimated to be approximately twice as massive as the Sun and 15 times larger in diameter, and has around 90 times the Sun's bolometric luminosity." Bolometric refers to the total energy radiated, both visible and outside the visible portion. Check the Wikipedia article on "Hamal" for additional details about this star.
Which magnitude of star is brighter -5 or 2?
Negative magnitudes are always brighter. Our Sun has an apparent magnitude of -26.3
What is Draco star type?
Draco star type is negative
What is the luminosity of the star regulus?
In astronomy, Luminosity is the amount of energy a body radiates per unit time. The luminosity of stars is measured in two forms: apparent (counting visible light only) and bolometric (total radiant energy); a bolometer is an instrument that measures radiant energy over a wide band by absorption and measurement of heating. When not qualified, luminosity means bolometric luminosity, which is measured in the SI units watts, or in terms of solar luminosities, ; that is, how many times as much energy the object radiates than the Sun, whose luminosity is 3.846×1026 W. Luminosity is an intrinsic constant independent of distance, and is measured as absolute magnitude corresponding to apparent luminosity, or bolometric magnitude corresponding to bolometric luminosity. In contrast, apparent brightness is related to distance by an inverse square law. Visible brightness is usually measured by apparent magnitude, which is on a logarithmic scale. In measuring star brightnesses, visible luminosity (not total luminosity at all wave lengths), apparent magnitude (visible brightness), and distance are interrelated parameters. If you know two, you can determine the third. Since the sun's luminosity is the standard, comparing these parameters with the sun's apparent magnitude and distance is the easiest way to remember how to convert between them.
I am given the bolometric BC equals -1.46 and the visual magnitude V equals 4.33 of a star. how do you calculate the angular diameter?
The bolometric correction allows you to convert between visual and bolometric (total) magnitude - where the bolometric magnitude includes all radiation emitted by the star, not just visible light. It has nothing to do with the angular diameter.
Which magnitude gives the most information about the physical nature of a star?
absolute bolometric magnitude
What is absolute bolometric magnitude?
Absolute magnitude is the brightness of an object (star, galaxy, etc.) from a standard distance."Bolometric" means that the entire energy output is calculated - not just visible light.
Which star is more powerful R136a1 or VY Canis Majoris?
R136a1 is the brightest known star. VY Canis Majoris. Its bolometric luminosity is estimated at 8.7 million times that of our Sun. VY Canis Majoris has a bolometric luminosity estimated at 450,000 that of the Sun, which is still very powerful. Bolometric luminosity refers to the entire radiation emitted at all wavelengths (not only visible light), so it is a measure of the power emitted by the star.
What type of star is hamal?
From Wikipedia: "It is estimated to be approximately twice as massive as the Sun and 15 times larger in diameter, and has around 90 times the Sun's bolometric luminosity." Bolometric refers to the total energy radiated, both visible and outside the visible portion. Check the Wikipedia article on "Hamal" for additional details about this star.
F star an o star?
No - an F star is an F star and an O star is well an O star The Harvard Spectral Classifications say that a Class 0 star have temperatures =>30,000 degrees Kelvin, they are blue in conventional and apparent colour, have a mass of =>16 Mo, have a solar radii =>6.6 Ro and have a luminosity (bolometric) of =>30,000 Lo. Class F star have temperatures 6,000 - 7,500 degrees Kelvin, they are yellowish-white in conventional colour and white in apparent colour, have a mass of 1.04 - 1.4 Mo, have a solar radii 1.15 - 1.4 Ro and have a luminosity (bolometric) of 1.5 - 5 Lo.
What body in space is the most luminous star?
The most luminous star in space is named R136a1 which is 160,000 light years away from space. It measures absolute bolometric magnitude of -12.6 , and an apparent visible magnitude of 12.84.
Which magnitude of star is brighter -5 or 2?
Negative magnitudes are always brighter. Our Sun has an apparent magnitude of -26.3
How do positive and negative numbers relate to a star's temperature?
the positive is the dimmest star. the negative is the brightest star.
What is the 2nd Star Trek series?
Star Trek: The Next Generation (1987-1994) Correction!: Star Trek: The Animated Series (1973-1975)
Which star has the largest absolute magnitude?
There is a star in the Large Magellanic Cloud called R136a1 which has an absolute magnitude of -12.5. Undoubtedly others will turn up as time goes by. M33-013406.63 in the Traingulm Galaxy has an absolute magnitude of -12.2 to -12.7 (not quite sure of the exact M)
Why does Bellatrix has the brightest absolute magnitude?
The simple answer is that it does not. It is important to note that stars radiate across a whole range of electromagnetic frequencies, not just in the visible part of the spectrum. Astronomers use bolometric absolute magnitude to adjust for the fact that a star may be radiating much of their energy outside of the visible range. Using the bolometric absolute magnitude, the brightest star, with magnitude -12.5 is RMC136a1 in the Large Magellanic Cloud, at a distance of 163000 light years.Among stars visible to the naked eye, Bellatrix does not even make it to the top ten in terms of its bolometric absolute magnitude. That distinction goes to P Cygni with an absolute magnitude of -9.7. It is 5900 light years away. In comparison, Bellatrix has a magnitude of only -2.64
