Troubled Times

Frayer, David W.; Martin, Debra L.

doi:10.4324/9781315078328

Cited by 32 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For how long will these galaxies continue to form stars? This depends on the mass of molecular gas, Mgas, still available in these sources, which is information provided by Frayer et al (2011) and Lupu et al (2012) via the detection of carbon monoxide (CO) emission lines. Here we have updated their estimates in light of the new amplification factors derived by D13.…”

Section: Discussionmentioning

confidence: 99%

“…For all our targets the redshift of the background galaxy has been constrained through the detection of CO emission lines by Z-spec (Lupu et al 2012), GBT/Zpec (Frayer et al 2011;Harris et al 2012), PdBI (N10, Omont et al 2011Omont et al , 2013George et al in prep. ) and CARMA (Leew et al in prep.).…”

Section: Spectroscopic Redshiftsmentioning

confidence: 99%

“…To confirm this prediction, the five sources with F500 > 100 mJy and with high−z colours identified in the H-ATLAS/SDP field have been the subject of intensive multiwavelength follow-up observations. The follow-up campaign includes observations from the ground with the Keck telescopes (Negrello et al 2010, N10 hereafter), the Submillimeter Array (SMA) (Negrello et al 2010;Bussmann et al 2013), the Zpectrometer instrument on the NRAO Robert C. Byrd Green Bank Telescope (GBT) (Frayer et al 2011;Harris et al 2012), the Z-Spec spectrometer (Lupu et al 2012), the IRAM Plateau de Bure Interferometer (PdBI) (Omont et al 2011(Omont et al , 2013George et al in prep. ), the Max-Planck Millimeter Bolometer (MAMBO) at the IRAM 30 meter telescope on Pico Veleta (Dannerbauer et al in prep.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Herschel *-ATLAS: deep HST/WFC3 imaging of strongly lensed submillimetre galaxies

Negrello

Hopwood

Dye

et al. 2014

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

We report on deep near-infrared observations obtained with the Wide Field Camera 3 (WFC3) onboard the Hubble Space Telescope (HST) of the first five confirmed gravitational lensing events discovered by the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS). We succeed in disentangling the background galaxy from the lens to gain separate photometry of the two components. The HST data allow us to significantly improve on previous constraints of the mass in stars of the lensed galaxy and to perform accurate lens modelling of these systems, as described in the accompanying paper by Dye et al. (2013). We fit the spectral energy distributions of the background sources from near-IR to millimetre wavelengths and use the magnification factors estimated by Dye et al. to derive the intrinsic properties of the lensed galaxies. We find these galaxies to have star-formations rates SFR∼ 400 − 2000 M ⊙ yr −1 , with ∼ (6 − 25)×10 10 M ⊙ of their baryonic mass already turned into stars. At these rates of star formation, all remaining molecular gas will be exhausted in less than ∼100 Myr, reaching a final mass in stars of a few 10 11 M ⊙ . These galaxies are thus proto-ellipticals caught during their major episode of star formation, and observed at the peak epoch (z ∼ 1.5 − 3) of the cosmic star formation history of the Universe.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Spectroscopic Redshiftsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Herschel *-ATLAS: deep HST/WFC3 imaging of strongly lensed submillimetre galaxies

Negrello

Hopwood

Dye

et al. 2014

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

show abstract

“…As methods advanced, a number of sub-mm galaxies (SMGs) were successfully targeted with optical telescopes, based on prior radio counterpart identifications (e.g., Ivison et al 2002). Further observations could map the gas content (typically CO) of a handful of these systems (Frayer et al 1998(Frayer et al , 1999Ledlow et al 2002;Neri et al 2003;Greve et al 2005;Hainline et al 2006;Tacconi et al 2006Tacconi et al , 2008. Much of the work on the earliest known sources concluded that due to the clumpy/irregular morphologies or high gas densities, these systems were likely to be late-stage mergers (Tacconi et al 2006(Tacconi et al , 2008Ivison et al 2002;Smail et al 2003;Engel et al 2010;Zamojski et al 2011;Menéndez-Delmestre et al 2013;Wiklind et al 2014;Chen et al 2015), though cf Swinbank et al (2011), which found evidence for a rotating disk.…”

Section: ) Hasmentioning

confidence: 99%

Cosmic happenstance: 24-µm selected, multicomponent Herschel sources are line-of-sight projections

Scudder

Oliver

Hurley

et al. 2018

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

In this paper, we investigate the physical associations between blended far-infrared (FIR)-emitting galaxies, in order to identify the level of line-of-sight projection contamination in the single-dish Herschel data. Building on previous work, and as part of the Herschel Extragalactic Legacy Project (HELP), we identify a sample of galaxies in the COSMOS field which are found to be both FIR-bright (typically ∼ 15 mJy) and blended within the Herschel 250 µm beam. We identify a spectroscopic or photometric redshift for each FIR-bright source. We conduct a joint probability distribution analysis on the redshift probability density functions to determine the fraction of the FIR sources with multiple FIR-bright counterparts which are likely to be found at consistent (∆z< 0.01) redshifts. We find that only 3 (0.4 per cent) of the pair permutations between counterparts are > 50 per cent likely to be at consistent redshifts. A majority of counterparts (72 per cent) have no overlap in their redshift probability distributions whatsoever. This is in good agreement with the results of recent simulations, which indicate that single-dish observations of the FIR sky should be strongly contaminated by line of sight projection effects. We conclude that for our sample of 3.6-and 24-µm selected, FIR-bright objects in the COSMOS field, the overwhelming majority of multi-component FIR systems are line of sight projections within the 18.1 arcsec Herschel beam, rather than physical associations.

show abstract

“…The family of primates that includes humans, Hominidae, is characterized by relatively high levels of male-male physical competition ( Harcourt, 1978 ; Nishida et al, 1985 , 1990 ; Galdikas, 1985 ; de Waal, 1986 ; Goodall, 1986 ; Kano, 1992 ; Wrangham and Peterson, 1996 ; Furuichi, 1997 ; Jurmain, 1997 ; Wrangham, 1999 ; Hohmann and Fruth, 2003 ; Watts et al, 2006 ; Boesch et al, 2008 ; Puts, 2010 ; Wilson et al, 2014 ). This phylogenetic legacy, plus the archeological record ( Keeley, 1996 ; Walker, 2001 ; Guilaine and Zammit, 2008 ; Estabrook, 2014 ; Frayer and Martin, 2014 ; Martin and Harrod, 2015 ), historical record ( Keeley, 1996 ; Pinker, 2011 ), genetic diversity record ( Zerjal et al, 2003 ; Karmin et al, 2015 ) and behavior of modern humans ( Chagnon, 1988 ; Daly and Wilson, 1988 ; Otterbein, 2004 ; Puts, 2010 ; Wrangham and Glowacki, 2012 ; Sell et al, 2012 ; Fry and Söderberg, 2013 ; Walker and Bailey, 2013 ) are consistent with selection on aggressive behavior having been important in our evolutionary past. Given the impact of male-male and intergroup aggression on reproductive fitness in the Hominidae, it is possible that selection on aggressive behavior was one of the many factors that has influenced the musculoskeletal system of hominins.…”

Section: Introductionmentioning

confidence: 99%

Muscle activation during maximal effort tasks: evidence of the selective forces that shaped the musculoskeletal system of humans

2015

View full text Add to dashboard Cite

The selective forces that played a role in the evolution of the musculoskeletal system of the genus Homo have long been debated and remain poorly understood. In this investigation, we introduce a new approach for testing alternative hypotheses. Our analysis is based on the premise that natural selection can be expected to have resulted in muscles that are large enough to achieve necessary levels of maximum performance in essential behaviors, but not larger. We used surface electromyography in male subjects to identify maximum activation levels in 13 muscles of the back and leg during eight behaviors that have been suggested to have been important to foraging, hunting and fighting performance in early humans. We asked two questions: (1) what behaviors produce maximum activation in each of the investigated muscles and (2) are there specific behaviors that elicit maximum recruitment from all or most of the muscles? We found that in eight of the 13 muscles, the highest activity occurred during maximal effort vertical jumping (i.e. whole-body acceleration). Punching produced the highest median activity in the other five muscles. Together, jumping and punching accounted for 73% of the incidences of maximum activity among all of the muscles and from all of the subjects. Thus, the size of the muscles of the back and leg appear to be more related to the demands of explosive behaviors rather than those of high speed sprinting or sustained endurance running. These results are consistent with the hypothesis that selection on aggressive behavior played an important role in the evolution of the genus Homo.

show abstract

Troubled Times

Cited by 32 publications

References 0 publications

Herschel *-ATLAS: deep HST/WFC3 imaging of strongly lensed submillimetre galaxies

Herschel *-ATLAS: deep HST/WFC3 imaging of strongly lensed submillimetre galaxies

Cosmic happenstance: 24-µm selected, multicomponent Herschel sources are line-of-sight projections

Muscle activation during maximal effort tasks: evidence of the selective forces that shaped the musculoskeletal system of humans

Contact Info

Product

Resources

About