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  2. Luminosity function (astronomy) - Wikipedia

    en.wikipedia.org/wiki/Luminosity_function...

    Historically, the Schechter luminosity function was inspired by the Press–Schechter model. [ 8 ] However, the connection between the two is not straight forward. If one assumes that every dark matter halo hosts one galaxy, then the Press-Schechter model yields a slope α ∼ − 3.5 {\displaystyle \alpha \sim -3.5} for galaxies instead of the ...

  3. Press–Schechter formalism - Wikipedia

    en.wikipedia.org/wiki/Press–Schechter_formalism

    The Press–Schechter formalism predicts that the number of objects with mass between and + is: = (+) ¯ (+) / ⁡ (() (+) /). where is the index of the power spectrum of the fluctuations in the early universe (), ¯ is the mean (baryonic and dark) matter density of the universe at the time the fluctuation from which the object was formed had gravitationally collapsed, and is a cut-off mass ...

  4. Malmquist bias - Wikipedia

    en.wikipedia.org/wiki/Malmquist_bias

    The dashed red line is an example luminosity function when the Malmquist bias is not corrected for. The more numerous low luminosity objects are underrepresented because of the apparent magnitude limit of the survey. The solid blue line is the properly corrected luminosity function using the volume-weighted correction method.

  5. Paul L. Schechter - Wikipedia

    en.wikipedia.org/wiki/Paul_L._Schechter

    Paul L. Schechter (born May 30, 1948) is an American astronomer and observational cosmologist. He is the William A. M. Burden Professor of Astrophysics, Emeritus, at MIT . Schechter received his bachelor's degree from Cornell in 1968, and his Ph.D. degree from Caltech in 1975.

  6. Functional analysis - Wikipedia

    en.wikipedia.org/wiki/Functional_analysis

    Functional analysis is a branch of mathematical analysis, the core of which is formed by the study of vector spaces endowed with some kind of limit-related structure (for example, inner product, norm, or topology) and the linear functions defined on these spaces and suitably respecting these structures.

  7. Schechter: Life Insurance 'Gets A Bad Rap' - AOL

    www.aol.com/news/schechter-life-insurance-gets...

    You invest $100,000 in a rental home with a friend to be used as a passive income generator. Ten years later, the principal mortgage is paid off and the investment is worth $150,000. You’re ...

  8. Today's Wordle Hint, Answer for #1248 on Monday, November 18 ...

    www.aol.com/lifestyle/todays-wordle-hint-answer...

    Today's Wordle Answer for #1248 on Monday, November 18, 2024. Today's Wordle answer on Monday, November 18, 2024, is FRAIL. How'd you do? Next: Catch up on other Wordle answers from this week.

  9. “Golden Bachelorette”’s Chock Told Friends He 'Was an ...

    www.aol.com/golden-bachelorette-chock-told...

    Chock Chapple proposed to Joan Vassos in the show's Nov. 13 finale and tells PEOPLE he found it "very tough" to hide the engagement from friends