Results 11 to 20 of about 2,874 (264)

Variation in the stellar mass function along stellar streams [PDF]

Monthly Notices of the Royal Astronomical Society, 2021
ABSTRACT Stellar streams are the inevitable end product of star cluster evolution, with the properties of a given stream being related to its progenitor. We consider how the dynamical history of a progenitor cluster, as traced by the evolution of its stellar mass function, is reflected in the resultant stream.
Jeremy J Webb, Jo Bovy
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The COSMOS2015 galaxy stellar mass function [PDF]

Astronomy & Astrophysics, 2017
We measure the stellar mass function (SMF) and stellar mass density of galaxies in the COSMOS field up to z ~ 6. We select them in the near-IR bands of the COSMOS2015 catalogue, which includes ultra-deep photometry from UltraVISTA-DR2, SPLASH, and Subaru/Hyper Suprime-Cam. At z> 2.5 we use new precise photometric redshifts with error σz = 0.03(1 + z)
Davidzon, I., Ilbert, O., Laigle, C., Coupon, J., Mccracken, H. J., Delvecchio, I., Masters, D., Capak, P., Hsieh, B.C., Le Fèvre, O., Tresse, L., Bethermin, M., Chang, Y.Y., Faisst, A.L., Le Floc'H, E., Steinhardt, C., Toft, S., Aussel, H., Dubois, C., Hasinger, G., Salvato, M., Sanders, D.B., Scoville, N., Silverman, J.D.   +23 more
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The massive end of the stellar mass function [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
11 pages, 8 figures, Accepted to ...
D'Souza, R., Vegetti, S., Kauffmann, G.
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On the galaxy stellar mass function, the massmetallicity relation and the implied baryonic mass function [PDF]

Monthly Notices of the Royal Astronomical Society, 2008
A comparison between published field galaxy stellar mass functions (GSMFs) shows that the cosmic stellar mass density is in the range 4–8 per cent of the baryon density (assuming Ωb= 0.045 ). There remain significant sources of uncertainty for the dust correction and underlying stellar mass-to-light ratio even assuming a reasonable universal stellar ...
Baldry, I. K., Glazebrook, Karl, Driver, S. P.   +2 more
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The origin of the Arches stellar cluster mass function [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2007
Abstract We investigate the time-evolution of the mass distribution of pre-stellar cores (PSCs) and their transition to the initial stellar mass function (IMF) in the central parts of a molecular cloud (MC) under the assumption that the coalescence of cores is important.
Dib, Sami, Kim, Jongsoo, Shadmehri, Mohsen   +2 more
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A nonextensive insight into the stellar initial mass function [PDF]

EPL (Europhysics Letters), 2019
the present paper, we propose that the stellar initial mass distributions as known as IMF are best fitted by $q$-Weibulls that emerge within nonextensive statistical mechanics. As a result, we show that the Salpeter's slope of $\sim$2.35 is replaced when a $q$-Weibull distribution is used.
de Freitas, D. B., Eufrasio, R. T., Nepomuceno, M. M. F., da Silva, J. R. P.   +3 more
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THE HIGH-MASS STELLAR INITIAL MASS FUNCTION IN M31 CLUSTERS [PDF]

The Astrophysical Journal, 2015
We have undertaken the largest systematic study of the high-mass stellar initial mass function (IMF) to date using the optical color-magnitude diagrams (CMDs) of 85 resolved, young (4 Myr < t < 25 Myr), intermediate mass star clusters (10^3-10^4 Msun), observed as part of the Panchromatic Hubble Andromeda Treasury (PHAT) program.
Daniel R. Weisz, L. Clifton Johnson, Daniel Foreman-Mackey, Andrew E. Dolphin, Lori C. Beerman, Benjamin F. Williams, Julianne J. Dalcanton, Hans-Walter Rix, David W. Hogg, Morgan Fouesneau, Benjamin D. Johnson, Eric F. Bell, Martha L. Boyer, Dimitrios Gouliermis, Puragra Guhathakurta, Jason S. Kalirai, Alexia R. Lewis, Anil C. Seth, Evan D. Skillman   +18 more
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Stellar initial mass function varies with metallicity and time

Nature, 2023
Most structural and evolutionary properties of galaxies strongly rely on the stellar initial mass function (IMF), namely the distribution of the stellar mass formed in each episode of star formation. As the IMF shapes the stellar population in all stellar systems, it turns out to become one of the most fundamental concepts of modern astronomy.
Jiadong Li, Chao Liu, Zhi-Yu Zhang, Hao Tian, Xiaoting Fu, Jiao Li, Zhi-Qiang Yan   +6 more
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On the temporal evolution of the stellar mass function of Galactic clusters [PDF]

Proceedings of the International Astronomical Union, 2009
AbstractWe show that we can obtain a good fit to the present-day stellar-mass functions of a large sample of young and old Galactic clusters with a tapered Salpeter power-law distribution function with an exponential truncation of the form dN/dm ∝ mα [1 − exp(−m/mc)β].
De Marchi, Guido, Paresce, Francesco, Zwart, Simon Portegies   +2 more
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A METHOD FOR MEASURING VARIATIONS IN THE STELLAR INITIAL MASS FUNCTION [PDF]

The Astrophysical Journal, 2010
We present a method for investigating variations in the upper end of the stellar Initial Mass Function (IMF) by probing the production rate of ionizing photons in unresolved, compact star clusters with ...
Calzetti, D., Chandar, R., Lee, J. C., Elmegreen, B. G., Kennicutt, R. C., Whitmore, B.   +5 more
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