The Redshift Distribution of Dusty Star-Forming Galaxies From the SPT Survey

Strandet, M.; Weiß, A.; Vieira, J. D.; Breuck, C. De; Aguirre, James E.; Aravena, M.; Ashby, M. L. N.; Béthermin, M.; Bradford, C. M.; Carlstrom, J. E.; Chapman, Scott; Crawford, T. M.; Everett, W.; Fassnacht, C. D.; Furstenau, R. M.; Gonzalez, Anthony H.; Greve, T. R.; Gullberg, B.; Hezaveh, Yashar; Kamenetzky, J.; Litke, Katrina C.; Ma, Jingzhe; Malkan, M.; Marrone, Daniel P.; Menten, K. M.; Murphy, E. J.; Nadolski, A.; Rotermund, K. M.; Spilker, Justin; Stark, A. A.; Welikala, N.

doi:10.3847/0004-637x/822/2/80

Cited by 151 publications

(259 citation statements)

References 64 publications

Supporting

Mentioning

235

Contrasting

Order By: Relevance

“…We can also think of two physical reasons for the low lensing fractions, namely the absence of a redshift selection and the actual decrease in the lensed fraction at lower flux densities. Redshift selection lifts the probability of lensing, by ensuring the sources are drawn from the redshift space most lensed sources are in (Strandet et al 2016). Similarly, at lower flux densities, the fraction of lensed sources decreases, as can be seen in Figure 10.…”

Section: Redshift Distribution Of the Herbs Samplementioning

confidence: 66%

“…A slightly less strong agreement with the ALESS sample was found, which probes deeper on a smaller part of the sky. Interestingly, Strandet et al (2016) sample is more similar than to the deeper ALESS sample, especially as Strandet et al (2016) found those two samples to be different. This is further proven by the small lensing fraction in the ALESS sample, compared to the sizeable lensing fraction in the SPT sample, and the lensing fraction we find in Section 5.4.…”

Section: Redshift Distribution Of the Herbs Samplementioning

confidence: 99%

“…SPT survey by a flux cut at S 1.4mm > 20 mJy, and demanding the source has a dust-like spectrum. Low-redshift sources were removed with radio and far-infrared flux limits (Weiß et al 2013;Strandet et al 2016). The ALESS sample is initially selected from the LESS sample at S 870µm > 4.4 mJy from the 0.25 sqr.…”

Section: Redshift Distribution Of the Herbs Samplementioning

confidence: 99%

“…In order to decrease the contamination rate, we impose a photometric cutoff redshift z phot > 2 based on the Herschel-SPIRE fluxes. The probability of lensing below this redshift falls off sharply, because of the smaller volume available between us and the source (Strandet et al 2016). We will calculate the expected amount of lensed galaxies in our sample, by comparing the fluxes of our sources to a cosmological evolution model that takes lensing into account.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The Herschel Bright Sources (HerBS): sample definition and SCUBA-2 observations

Bakx

Eales

Negrello

et al. 2017

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

We present the Herschel Bright Sources (HerBS) sample, a sample of bright, high-redshift Herschel sources detected in the 616.4 square degree H-ATLAS survey. The HerBS sample contains 209 galaxies, selected with a 500 µm flux density greater than 80 mJy and an estimated redshift greater than 2. The sample consists of a combination of HyLIRGs and lensed ULIRGs during the epoch of peak cosmic star formation. In this paper, we present SCUBA-2 observations at 850 µm of 189 galaxies of the HerBS sample, 152 of these sources were detected. We fit a spectral template to the Herschel-SPIRE and 850 µm SCUBA-2 flux densities of 22 sources with spectroscopically determined redshifts, using a two-component modified blackbody spectrum as a template. We find a cold-and hot-dust temperature of 21.29 +1.35 −1.66 K and 45.80 +2.88 −3.48 K, a cold-to-hot dust mass ratio of 26.62 +5.61 −6.74 and a β of 1.83 +0.14 −0.28 . The poor quality of the fit suggests that the sample of galaxies is too diverse to be explained by our simple model. Comparison of our sample to a galaxy evolution model indicates that the fraction of lenses is high. Out of the 152 SCUBA-2 detected galaxies, the model predicts 128.4 ± 2.1 of those galaxies to be lensed (84.5%). The SPIRE 500 µm flux suggests that out of all 209 HerBS sources, we expect 158.1 ± 1.7 lensed sources, giving a total lensing fraction of 76 per cent.

show abstract

Section: Redshift Distribution Of the Herbs Samplementioning

confidence: 66%

Section: Redshift Distribution Of the Herbs Samplementioning

confidence: 99%

Section: Redshift Distribution Of the Herbs Samplementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Herschel Bright Sources (HerBS): sample definition and SCUBA-2 observations

Bakx

Eales

Negrello

et al. 2017

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

show abstract

“…The first concerns the discovery of an abundant population of dusty star-forming galaxies at redshifts z 1, that has been shown to be responsible for the bulk of the cosmic star formation history, in particular around the crucial redshifts z ≈ 2 − 3 where it peaks (e.g., Gruppioni et al 2013;Rowan-Robinson et al 2016;Bourne et al 2017;Dunlop et al 2017;Novak et al 2017), and to be present even out to z 6 (e.g., Cooray et al 2014;Riechers et al 2017;Zavala et al 2017). Such achievement has become feasible only recently thanks to wide-area far-IR/sub-mm surveys conducted by Herschel, ASTE/AzTEC, APEX/LABOCA, JCMT/SCUBA2, and ALMA-SPT (e.g., Gruppioni et al 2013Gruppioni et al , 2015Lapi et al 2011;Weiss et al 2013;Strandet et al 2016;Koprowski et al 2014Koprowski et al , 2016, in many instances eased by gravitational lensing from foreground objects (e.g., Negrello et al 2014Negrello et al , 2017Nayyeri et al 2016). In fact, galaxies endowed with star formation ratesṀ ⋆ a few tens M ⊙ yr −1 at redshift z 2 were largely missed by rest-frame optical/UV surveys because of heavy dust obscuration, difficult to correct for with standard techniques based only on UV spectral data (e.g., Bouwens et al 2016Bouwens et al , 2017Mancuso et al 2016a;Pope et al 2017;Ikarashi et al 2017;Simpson et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Stellar Mass Function of Active and Quiescent Galaxies via the Continuity Equation

Lapi

Mancuso

Bressan

et al. 2017

ApJ

View full text Add to dashboard Cite

The continuity equation is developed for the stellar mass content of galaxies, and exploited to derive the stellar mass function of active and quiescent galaxies over the redshift range z ∼ 0 − 8. The continuity equation requires two specific inputs gauged on observations: (i) the star formation rate functions determined on the basis of the latest UV+far-IR/sub-mm/radio measurements; (ii) average star-formation histories for individual galaxies, with different prescriptions for discs and spheroids. The continuity equation also includes a source term taking into account (dry) mergers, based on recent numerical simulations and consistent with observations. The stellar mass function derived from the continuity equation is coupled with the halo mass function and with the SFR functions to derive the star formation efficiency and the main sequence of star-forming galaxies via the abundance matching technique. A remarkable agreement of the resulting stellar mass function for active and quiescent galaxies, of the galaxy main sequence and of the star-formation efficiency with current observations is found; the comparison with data also allows to robustly constrain the characteristic timescales for star formation and quiescence of massive galaxies, the star formation history of their progenitors, and the amount of stellar mass added by in-situ star formation vs. that contributed by external merger events. The continuity equation is shown to yield quantitative outcomes that must be complied by detailed physical models, that can provide a basis to improve the (sub-grid) physical recipes implemented in theoretical approaches and numerical simulations, and that can offer a benchmark for forecasts on future observations with multi-band coverage, as it will become routinely achievable in the era of JWST.

show abstract

Molecular gas in distant galaxies from ALMA studies

Combes

2018

Astron Astrophys Rev

View full text Add to dashboard Cite

ALMA is now fully operational, and has been observing in early science mode since 2011. The millimetric (mm) and sub-mm domain is ideal to tackle galaxies at high redshift, since the emission peak of the dust at 100µm is shifted in the ALMA bands (0.3mm to 1mm) for z=2 to 9, and the CO lines, stronger at the high-J levels of the ladder, are found all over the 0.3-3mm range. Pointed surveys and blind deep fields have been observed, and the wealth of data collected reveal a drop at high redshifts (z > 6) of dusty massive objects, although surprisingly active and gas-rich objects have been unveiled through gravitational lensing. The window of the reionization epoch is now wide open, and ALMA has detected galaxies at z=8-9 mainly in continuum, [CII] and [OIII] lines. Galaxies have a gas fraction increasing steeply with redshift, as (1+z) 2 , while their star formation efficiency increases also but more slightly, as (1+z) 0.6 to (1+z) 1 . Individual object studies have revealed luminous quasars, with black hole masses much higher than expected, clumpy galaxies with resolved star formation rate compatible with the Kennicutt-Schmidt relation, extended cold and dense gas in a circumgalactic medium, corresponding to Lyman-α blobs, and proto-clusters, traced by their brightest central galaxies.

show abstract

The Redshift Distribution of Dusty Star-Forming Galaxies From the SPT Survey

Cited by 151 publications

References 64 publications

The Herschel Bright Sources (HerBS): sample definition and SCUBA-2 observations

The Herschel Bright Sources (HerBS): sample definition and SCUBA-2 observations

Stellar Mass Function of Active and Quiescent Galaxies via the Continuity Equation

Molecular gas in distant galaxies from ALMA studies

Contact Info

Product

Resources

About