Submillimetre constraints on hyper-extremely red objects in the Subaru Deep Field

Coppin, K. E. K.; Halpern, M.; Scott, D.; Marsden, G.; Iwamuro, Fumihide; Maihara, Toshinori; Motohara, Kentaro; Totani, Tomonori

doi:10.1111/j.1365-2966.2004.08181.x

Cited by 3 publications

(3 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Finally, Wang et al (2019), building on previous work that connected galaxies having extremely red near-infrared colours with submillimetre sources (e.g. Smail et al 1999;Im et al 2002;Frayer et al 2004;Coppin et al 2004), obtained ALMA snapshot continuum observations of a sample of 63 sources with very red 160 − 4.5 colours and detected 39 of these with 870-m flux densities, 870 , of 870 ≥ 0.6 mJy.…”

Section: Introductionmentioning

confidence: 99%

An ALMA survey of the S2CLS UDS field: optically invisible submillimetre galaxies

Smail

Dudzevičiūtė

Stach

et al. 2021

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

We analyse a robust sample of 30 near-infrared-faint (KAB > 25.3, 5σ) submillimetre galaxies selected from a 0.96 deg2 field, to investigate their properties and the cause of their faintness in optical/near-infrared wavebands. Our analysis exploits precise identifications based on ALMA 870-μm continuum imaging, combined with very deep near-infrared imaging from the UKIDSS-UDS survey. We estimate that submillimetre galaxies with KAB > 25.3 mag represent 15 ± 2 per cent of the total population brighter than S870 = 3.6 mJy, with a potential surface density of ∼ 450 deg−2 above S870 ≥ 1 mJy. As such they pose a source of contamination in surveys for both high-redshift “quiescent” galaxies and very-high-redshift Lyman-break galaxies. We show that these K-faint submillimetre galaxies represent the tail of the broader submillimetre population, with comparable dust and stellar masses to KAB ≤ 25.3 mag submillimetre galaxies, but lying at significantly higher redshifts (z = 3.44 ± 0.06 versus z = 2.36 ± 0.11) and having higher dust attenuation (AV = 5.2 ± 0.3 versus AV = 2.9 ± 0.1). We investigate the origin of the strong dust attenuation and find indications that these K-faint galaxies have smaller dust continuum sizes than the KAB ≤ 25.3 mag galaxies, as measured by ALMA, that suggests their high attenuation is related to their compact sizes. We identify a correlation of dust attenuation with star-formation rate surface density (ΣSFR), with the K-faint submillimetre galaxies representing the higher-ΣSFR and highest-AV galaxies. The concentrated, intense star-formation activity in these systems is likely to be associated with the formation of spheroids in compact galaxies at high redshifts, but as a result of their high obscuration these galaxies are completely missed in UV, optical and even near-infrared surveys.

show abstract

Section: Introductionmentioning

confidence: 99%

An ALMA survey of the S2CLS UDS field: optically invisible submillimetre galaxies

Smail

Dudzevičiūtė

Stach

et al. 2021

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

show abstract

“…Several populations of galaxies have been shown to contribute significant minorities of the submm EBL, such as EROs and HEROs, BzK galaxies, (e.g. Coppin et al 2004, Takagi et al 2007, Greve et al 2009), and Lyman-break galaxies (e.g. Peacock et al 2000).…”

Section: Introductionmentioning

confidence: 99%

The AGN fraction of submm-selected galaxies and contributions to the submm/mm-wave extragalactic background light

Serjeant

Negrello

Pearson

et al. 2010

A&A

View full text Add to dashboard Cite

We present a comparison of the SCUBA half degree extragalactic survey (SHADES) at 450 μm, 850 μm and 1100 μm with deep guaranteed time 15 μm AKARI FU-HYU survey data and Spitzer guaranteed time data at 3.6−24 μm in the Lockman hole east. The AKARI data was analysed using bespoke software based in part on the drizzling and minimum-variance matched filtering developed for SHADES, and was cross-calibrated against ISO fluxes. Our stacking analyses find AKARI 15 μm galaxies with > ∼ 200 μJy contribute >10% of the 450 μm background, but only <4% of the 1100 μm background, suggesting that different populations contribute at mm-wavelengths. We confirm our earlier result that the ultra-deep 450 μm SCUBA-2 cosmology survey will be dominated by populations already detected by AKARI and Spitzer mid-infrared surveys. The superb mid-infrared wavelength coverage afforded by combining Spitzer and AKARI photometry is an excellent diagnostic of AGN contributions, and we find that (23−52)% of submmselected galaxies have AGN bolometric fractions f AGN > 0.3.

show abstract

“…Since the discovery of SMGs, extremely red objects (EROs), usually defined with ( I − K ) Vega ≳ 4 or ( R − K ) Vega ≳ 5, and distant red galaxies with ( J − K ) Vega > 2.3 have been given particular attention as candidates of SMG counterparts (e.g. Smail et al 1999, 2002; Webb et al 2003; Coppin et al 2004; Frayer et al 2004; Clements et al 2004; Pope et al 2005). It turns out that the fraction of EROs or Distant Red Galaxies (DRGs) in SMGs is not very high and that their surface densities are not low enough to reject random associations.…”

Section: Introductionmentioning

confidence: 99%

A close relationship atz∼ 2: submillimetre galaxies and BzK-selected galaxies

Takagi

Ono

Shimasaku

et al. 2008

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

We investigated the relationship between two massive star‐forming galaxy populations at redshift z∼ 2, namely submillimetre galaxies (SMGs) and BzK‐selected galaxies (BzKs). Out of 60 SMGs found in the Subaru/XMM–Newton deep field, we collected optical–near‐infrared photometry of 28 radio counterparts for 24 SMGs, based on refined sky positions with a radio map for 35 SMGs. We found a correlation between their K‐band magnitudes and BzK[≡(z−K) − (B−z)] colours: almost all of the K‐faint (KAB > 21.3) radio‐detected SMGs have BzK > −0.2, and are therefore BzKs. This result strongly supports the idea of performing direct optical identification of SMGs by searching for BzKs around SMGs. We calculated the formal significance (P′ value) for each of the BzK associations around radio‐undetected SMGs, and found six new robust identifications, including one double identification. From this analysis, we obtained the current best estimate of the surface density of BzK‐selected SMGs, which indicates that only ∼1 per cent of BzKs are SMGs. If BzKs are normal disc‐like galaxies at z∼ 2, as indicated by the correlation between their star formation rate and stellar mass and also by dynamical properties, SMGs are likely to be merging BzKs. In this case, a typical enhancement of the star formation rate as a result of merging is a factor of only ∼3, which is an order of magnitude lower than that of local ultraluminous infrared galaxies (ULIRGs). This may indicate that most of the merging BzKs could be observed as SMGs. Considering a possible high fraction of mergers at z∼ 2 (which will at least be higher than the fraction at z≲ 1 of ∼10 per cent), it is puzzling to find such a low fraction of SMGs in the progenitor population (BzKs).

show abstract

Submillimetre constraints on hyper-extremely red objects in the Subaru Deep Field

Cited by 3 publications

References 35 publications

An ALMA survey of the S2CLS UDS field: optically invisible submillimetre galaxies

An ALMA survey of the S2CLS UDS field: optically invisible submillimetre galaxies

The AGN fraction of submm-selected galaxies and contributions to the submm/mm-wave extragalactic background light

A close relationship atz∼ 2: submillimetre galaxies and BzK-selected galaxies

Contact Info

Product

Resources

About