Results 51 to 60 of about 938,566 (341)

Quenching of Star Formation [PDF]

AIP Conference Proceedings, 2008
In the last decade we have seen an enormous increase in the size and quality of spectroscopic galaxy surveys, both at low and high redshift. New statistical techniques to analyse large portions of galaxy spectra are now finding favour over traditional index based methods. Here we will review a new robust and iterative Principal Component Analysis (PCA)
Vivienne Wild, Tamas Budavári, Jérémy Blaizot, C. Jakob Walcher, Peter H. Johansson, Gerard Lemson, Gabriella de Lucia, Stéphane Charlot, Coryn A.L. Bailer-Jones   +8 more
openaire   +3 more sources

Physical Processes in Star Formation [PDF]

Space Science Reviews, 2020
Star formation is a complex multi-scale phenomenon that is of significant importance for astrophysics in general. Stars and star formation are key pillars in observational astronomy from local star forming regions in the Milky Way up to high-redshift galaxies.
Martin Krause, Alexei G. Kritsuk, Marco Padovani, Simon C. O. Glover, Stella S. R. Offner, J. M. Diederik Kruijssen, Philipp Girichidis, Patrick Hennebelle, Patrick Hennebelle, Ralf S. Klessen   +9 more
openaire   +6 more sources

Network topology drives population temporal variability in experimental habitat networks

Population Ecology, EarlyView.
Habitat patches connected by dispersal pathways form habitat networks. We explored how network topology affects population outcomes in laboratory experiments using a model species (Daphnia carinata). Central habitat nodes in complex lattice networks exhibited lower temporal variability in population sizes, suggesting they support more stable ...
Yiwen Xu, J. Angus Webb, William D. Bovill, Elise L. King   +3 more
wiley   +1 more source

The specific star formation rate of high redshift galaxies: the case for two modes of star formation

, 2010
We study the specific star formation rate (SSFR) and its evolution at $z\gtsim 4$, in models of galaxy formation, where the star formation is driven by cold accretion flows.
Antonuccio-Delogu, Benson, Binney, Birnboim, Booth, Bouche, Boylan-Kolchin, Cattaneo, Conselice, Croton, Daddi, Daddi, Dekel, Dekel, Dekel, Dutton, Genel, Genzel, González, Hopkins, Jiang, Jogee, Joseph Silk, Kang, Kang, Kauffmann, Kennicutt, Kereš, Kereš, Khochfar, Khochfar, Khochfar, Khochfar, Khochfar, King, Lacey, Maio, Mo, Neistein, Neistein, Ocvirk, Oppenheimer, Peirani, Pérez-González, Rees, Sadegh Khochfar, Schaerer, Schaye, Silk, Silk, Silk, Springel, Stark, Tacconi, Yabe   +54 more
core   +1 more source

Star Formation Properties in Barred Galaxies(SFB). III. Statistical Study of Bar-driven Secular Evolution using a sample of nearby barred spirals [PDF]

, 2014
Stellar bars are important internal drivers of secular evolution in disk galaxies. Using a sample of nearby spiral galaxies with weak and strong bars, we explore the relationships between the star formation feature and stellar bars in galaxies.
Cao, Chen, Wu, Hong, Zhou, Zhi-Min
core   +2 more sources

Geographic variation in walking activity in the red flour beetle Tribolium castaneum

Population Ecology, EarlyView.
This study examined whether there is geographic variation in field populations, focusing on the moving activity in the red flour beetle Tribolium castaneum. Results showed significant differences in moving activity among field populations but no correlation with latitude or meteorological factors.
Kentarou Matsumura
wiley   +1 more source

Radio Triggered Star Formation in Cooling Flows

, 1999
The giant galaxies located at the centers of cluster cooling flows are frequently sites of vigorous star formation. In some instances, star formation appears to have been triggered by the galaxy's radio source.
Allen, Allen, Allen, B.R. McNamara, Baum, Begelman, Burns, Cardiel, Crawford, Daly, De Young, di Serego Alighieri, Fabian, Heckman, Jannuzi, Johnstone, Koekemoer, McCarthy, McNamara, McNamara, McNamara, McNamara, McNamara, McNamara, Murphy, Pinkney, Porter, Sarazin, Sarazin, Schombert, Shields, Uson, van Breugel, van Breugel, Voit   +34 more
core   +2 more sources

Cluster formation versus star formation rates around six regions in the LMC [PDF]

, 2004
The stellar population and star clusters around six regions in the Large Magellanic Cloud (LMC) are studied to understand the correlation between star formation and cluster formation rates.
Subramaniam, Annapurni
core   +2 more sources

Determining the Methanol Deuteration in the Disk Around V883 Orionis with Laboratory Measured Spectroscopy

The Astronomical Journal
Deuterium fractionation, as studied through mono-deuterated methanol, is frequently used as a diagnostic tool to trace the physical conditions and chemical evolution of interstellar sources. This study investigates methanol deuteration in the disk around
Shaoshan Zeng, Jae-Hong Jeong, Takahiro Oyama, Jeong-Eun Lee, Yao-Lun Yang, Nami Sakai   +5 more
doaj   +1 more source

occumb: An R package for site occupancy modeling of eDNA metabarcoding data

Population Ecology, EarlyView.
This study introduces a new R package, occumb, for the convenient application of site occupancy modeling using environmental DNA (eDNA) metabarcoding data. We outline a data analysis workflow, including data setup, model fitting, model assessment, and comparison of potential study settings based on model predictions, all of which can be performed using
Keiichi Fukaya, Yuta Hasebe
wiley   +1 more source