scholarly journals The Star Formation Rate Intensity Distribution Function: Implications for the Cosmic Star Formation Rate History of the Universe

2002 ◽  
Vol 570 (2) ◽  
pp. 492-501 ◽  
Author(s):  
Kenneth M. Lanzetta ◽  
Noriaki Yahata ◽  
Sebastian Pascarelle ◽  
Hsiao‐Wen Chen ◽  
Alberto Fernandez‐Soto
Keyword(s):  
Distribution Function ◽  
Star Formation ◽  
Intensity Distribution ◽  
Star Formation Rate ◽  
Formation Rate ◽  
History Of ◽  
Rate Intensity ◽  
The Universe

scholarly journals Cosmic Star Formation from the Milky Way and its Satellites

1999 ◽  
Vol 190 ◽  
pp. 8-14
Author(s):  
F.D.A. Hartwick
Keyword(s):  
Star Formation ◽  
Star Formation Rate ◽  
Formation Rate ◽  
Star Formation History ◽  
Evolutionary Models ◽  
Disk Mass ◽  
Formation History ◽  
History Of ◽  
The Universe

We use observations and evolutionary models of local objects to interpret a recent determination of the star-formation history of the universe. By fitting the global star-formation rate, the model predicts the ratio of spheroid to disk mass of ~1, an intergalactic medium (IGM) whose mass is ~2.3 times the mass in stars, and whose metallicity is ~0.1 Z⊙.

scholarly journals From Gas to Stars Over Cosmic Time

Science ◽  
2013 ◽  
Vol 340 (6140) ◽  
pp. 1229229 ◽  
Author(s):  
Mordecai-Mark Mac Low
Keyword(s):  
Star Formation ◽  
Star Formation Rate ◽  
Formation Rate ◽  
Cosmic Time ◽  
First Stars ◽  
Initial Rise ◽  
Stellar Radiation ◽  
History Of ◽  
Supernova Explosions ◽  
The Universe

From the time the first stars formed over 13 billion years ago to the present, star formation has had an unexpectedly dynamic history. At first, the star-formation rate density increased dramatically, reaching a peak 10 billion years ago of more than 10 times the present-day value. Observations of the initial rise in star formation remain difficult, poorly constraining it. Theoretical modeling has trouble predicting this history because of the difficulty in following the feedback of energy from stellar radiation and supernova explosions into the gas from which further stars form. Observations from the ground and space with the next generation of instruments should reveal the full history of star formation in the universe, and simulations appear poised to accurately predict the observed history.

The Star Formation Rate Functions at z = 0–1: the Latter Half of the History of Visible and Hidden Star Formation in the Universe

2010 ◽  
Author(s):  
T. T. Takeuchi ◽  
V. Buat ◽  
D. Burgarella ◽  
E. Giovannoli ◽  
K. L. Murata ◽  
...  
Keyword(s):  
Star Formation ◽  
Star Formation Rate ◽  
Formation Rate ◽  
History Of ◽  
Rate Functions ◽  
The Universe

scholarly journals The Hα‐based Star Formation Rate Density of the Universe atz= 0.84

2008 ◽  
Vol 677 (1) ◽  
pp. 169-185 ◽  
Author(s):  
Víctor Villar ◽  
Jesús Gallego ◽  
Pablo G. Pérez‐González ◽  
Sergio Pascual ◽  
Kai Noeske ◽  
...  
Keyword(s):  
Star Formation ◽  
Star Formation Rate ◽  
Formation Rate ◽  
The Universe

Reconstructing the star formation history of the Solar neighbourhood with Gaia

2017 ◽  
Vol 13 (S334) ◽  
pp. 158-161
Author(s):  
Edouard J. Bernard
Keyword(s):  
Star Formation ◽  
Star Formation Rate ◽  
Formation Rate ◽  
Star Formation History ◽  
Solar Neighbourhood ◽  
The Past ◽  
Formation History ◽  
Magnitude Diagram ◽  
History Of

AbstractTaking advantage of the Gaia DR1, we combined TGAS parallaxes with the Tycho-2 and APASS photometry to calculate the star formation history (SFH) of the solar neighbourhood within 250 pc using the colour-magnitude diagram fitting technique. Our dynamically-evolved SFH is in excellent agreement with that calculated from the Hipparcos catalogue within 80 pc of the Sun, showing an enhanced star formation rate (SFR) in the past ~4 Gyr. We then correct the SFR for the disc thickening with age to obtain a SFR that is representative of the whole solar cylinder, and show that even with an extreme correction our results are not consistent with an exponentially decreasing SFR as found by recent studies. Finally, we discuss how this technique can be applied out to ~5 kpc thanks to the next Gaia data releases, which will allow us to quantify the SFH of the thin disc, thick disc and halo in situ.

scholarly journals Does the reionization model influence the constraints on dark matter decay or annihilation?

2021 ◽  
Vol 2021 (12) ◽  
pp. 034
Author(s):  
Lu Chen ◽  
Ke Wang
Keyword(s):  
Dark Matter ◽  
Star Formation ◽  
Star Formation Rate ◽  
Formation Rate ◽  
Power Spectra ◽  
Microwave Background ◽  
Dark Matter Annihilation ◽  
Planck Data ◽  
Upper Limit ◽  
History Of

Abstract If dark matter decay or annihilate, a large amount of energy and particles would be released into the cosmic plasma. Therefore, they could modify the thermal and ionization history of our universe, then leave footprints on the cosmic microwave background power spectra. In this paper, we take dark matter annihilation as an example and investigate whether different reionization models influence the constraints on dark matter annihilation. We consider the ionization history including both dark matter annihilation and star formation, then put constraints on DM annihilation. Combining the latest Planck data, BAO data, SNIa measurement, Q HII constraints from observations of quasars, as well as the star formation rate density from UV and IR data, the optical depth is τ = 0.0571+0.0005 -0.0006 at 68%C.L. and the upper limit of ϵ0 f d reads 2.7765 × 10-24 at 95%C.L.. By comparison, we also constrain dark matter annihilation in the instantaneous reionization model from the same data combination except the Q HII constraints and star formation rate density. We get τ = 0.0559+0.0069 -0.0076 at 68%C.L. and the upper limit of ϵ0 f d is 2.8468 × 10-24 at 95%C.L.. This indicates various reionization models have little influence (≲ 2.5%) on constraining parameters of dark matter decay or annihilation.

scholarly journals THE STELLAR MASS DENSITY AND SPECIFIC STAR FORMATION RATE OF THE UNIVERSE ATz∼ 7

2010 ◽  
Vol 713 (1) ◽  
pp. 115-130 ◽  
Author(s):  
Valentino González ◽  
Ivo Labbé ◽  
Rychard J. Bouwens ◽  
Garth Illingworth ◽  
Marijn Franx ◽  
...  
Keyword(s):  
Star Formation ◽  
Star Formation Rate ◽  
Mass Density ◽  
Formation Rate ◽  
Stellar Mass ◽  
The Universe
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