Results 1 to 10 of about 10,786,884 (386)

The Protostellar Luminosity Function [PDF]

The Astrophysical Journal, 2011
The protostellar luminosity function (PLF) is the present-day luminosity function of the protostars in a region of star formation. It is determined using the protostellar mass function (PMF) in combination with a stellar evolutionary model that provides ...
Andre, Baraffe, Bonnell, Christopher F. McKee, Connelley, Covey, Dunham, Dunham, Enoch, Enoch, Evans, Fuchs, Greene, Hartmann, Heiderman, Hosokawa, Hosokawa, Kirk, Kratter, Masunaga, McKee, McKee, McKee, McLaughlin, Mellon, Miller, Muzerolle, Myers, Myers, Offner, Offner, Offner, Palla, Pech, Robitaille, Sandell, Stella S. R. Offner, Tan, Vorobyov, White, White, Whitney, Young, Zhu   +43 more
core   +2 more sources

Quasar Luminosity Function at z = 7 [PDF]

The Astrophysical Journal Letters, 2023
We present the quasar luminosity function (LF) at z = 7, measured with 35 spectroscopically confirmed quasars at 6.55 < z < 7.15. The sample of 22 quasars from the Subaru High- z Exploration of Low-Luminosity Quasars (SHELLQs) project, combined with 13 ...
Yoshiki Matsuoka, Masafusa Onoue, Kazushi Iwasawa, Michael A. Strauss, Nobunari Kashikawa, Takuma Izumi, Tohru Nagao, Masatoshi Imanishi, Masayuki Akiyama, John D. Silverman, Naoko Asami, James Bosch, Hisanori Furusawa, Tomotsugu Goto, James E. Gunn, Yuichi Harikane, Hiroyuki Ikeda, Kohei Inayoshi, Rikako Ishimoto, Toshihiro Kawaguchi, Satoshi Kikuta, Kotaro Kohno, Yutaka Komiyama, Chien-Hsiu Lee, Robert H. Lupton, Takeo Minezaki, Satoshi Miyazaki, Hitoshi Murayama, Atsushi J. Nishizawa, Masamune Oguri, Yoshiaki Ono, Taira Oogi, Masami Ouchi, Paul A. Price, Hiroaki Sameshima, Naoshi Sugiyama, Philip J. Tait, Masahiro Takada, Ayumi Takahashi, Tadafumi Takata, Masayuki Tanaka, Yoshiki Toba, Shiang-Yu Wang, Takuji Yamashita   +43 more
doaj   +2 more sources

A Left and Right Truncated Schechter Luminosity Function for Quasars

Galaxies, 2017
The luminosity function for quasars (QSOs) is usually fitted by a Schechter function. The dependence of the number of quasars on the redshift, both in the low and high luminosity regions, requires the inclusion of a lower and upper boundary in the ...
Lorenzo Zaninetti
doaj   +4 more sources

The Luminosity Function of M3 [PDF]

The Astrophysical Journal, 1999
We present a high precision, large sample luminosity function (LF) for the Galactic globular cluster M3. With a combination of ground based and Hubble Space Telescope data we cover the entire radial extent of the cluster.
A. Chieffi, B. Dorman, B. Paltrinieri, Bell R. A., Bergbusch P. A., Buonanno R., Buonanno R., Cassisi S., Castellani V., Chieffi A., De Santis R., Degl'Innocenti S., E. Carretta, F. Fusi Pecci, F. R. Ferraro, Ferraro F. R., Ferraro F. R., Ferraro F. R., Fusi Pecci F., King I. R., Kraft R. P., Krist J., Laget M., O. Straniero, Pont F., Proffit C. R., R. Buonanno, R. T. Rood   +27 more
core   +2 more sources

The PICS project: II. Circumnebular extinction variations and their effect on the planetary nebula luminosity function [PDF]

Frontiers in Astronomy and Space Sciences
For decades, the theoretical understanding of planetary nebulae (PNe) has remained in tension with the observed universal bright-end cutoff of the PN luminosity function (PNLF).
Lucas M. Valenzuela, George H. Jacoby, Rhea-Silvia Remus, Marcelo M. Miller Bertolami, Marcelo M. Miller Bertolami, Roberto H. Méndez   +5 more
doaj   +2 more sources

Characterizing the luminosity components of luminous infrared galaxies in multi-wavelength from the X-ray to the far-infrared [PDF]

Scientific Reports
We characterize luminosity components of Ultra/Luminous Infrared Galaxies (U/LIRGs) in multi-wavelength from the X-ray to far-infrared. A set of 63 AGN U/LIRGs was selected where these galaxies are powered by a central active galactic nucleus (AGN ...
Abdallah A. M. Ali, Kamel A. K. Gadallah, Osama. M. Shalabiea, Mohamed. M. Beheary   +3 more
doaj   +2 more sources

Shedding light on the galaxy luminosity function [PDF]

Astronomy and Astrophysics Review, 2011
95 pages, 23 figures, 3 tables. Now published in The Astronomy & Astrophysics Review. This version: bring in line with A&AR format requirements, also minor typo corrections made, additional citations and higher rez images ...
exaly   +3 more sources

The Luminosity Function of Galaxies in Some Nearby Clusters

UHD Journal of Science and Technology, 2021
In the present work, the galaxy luminosity function (LF) has been studied for a sample of seven clusters in the redshift range (0.0 ≲ z ≲ 0.1), within Abell radius (1.5 h−1 Mpc), in the five SDSS passbands ugriz.
Mariwan Ahmed Rasheed, Khalid K. Mohammad   +1 more
doaj   +1 more source

On the mass distribution of stars in the solar neighborhood [PDF]

Serbian Astronomical Journal, 2006
The present authors analyze samples consisting of Hipparcos stars. Based on the corresponding HR diagrams they estimate masses of Main-Sequence stars from their visual magnitudes. They find that already beyond the heliocentric radius of 10 pc the effects
Ninković S., Trajkovska V.
doaj   +1 more source

Luminosity function of GRBs [PDF]

Astronomy & Astrophysics, 2001
We attempt to constrain the luminosity function of Gamma Ray Bursts (GRBs) from the observed number count--flux relation and the afterglow redshift data. We assume three classes of luminosity functions for our analysis: (a) Log-normal distribution, (b) Schechter distribution, and (c) Scale-free distribution. We assume several models of the evolution of
Sethi, Shiv, Bhargavi, S. G.
openaire   +2 more sources