A search for debris disks in the<i>Herschel</i>-ATLAS

Smith, D. J. B.; Stevens, J. A.; Jarvis, M. J.; Pérez, E.; Marshall, J. L.; Dunne, L.; Eales, Stephen Anthony; White, G. J.; Leeuw, Lerothodi Leonard; Sibthorpe, B.; Baes, M.; González-Solares, E.; Scott, D.; Vieiria, J.; Amblard, A.; Auld, Robbie Richard; Bonfield, D.; Burgarella, D.; Buttiglione, S.; Cava, A.; Clements, D. L.; Cooray, Asantha; Dariush, Aliakbar; Zotti, G. de; Dye, S.; Frayer, David; Fritz, J.; González‐Nuevo, J.; Herranz, D.; Ibar, E.; Ivison, R. J.; Lagache, G.; López‐Caniego, M.; Maddox, S.; Negrello, M.; Pascale, Enzo; Pohlen, M.; Rigby, E.; Rodighiero, G.; Samui, Saumyadip; Serjeant, S.; Temi, P.; Valtchanov, I.; Verma, Aprajita

doi:10.1051/0004-6361/201014639

Cited by 16 publications

(10 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 1 (bottom) shows the difference between the GAMA9 map at 250 µm and the same map after Nebuliser has been applied; the application of Nebuliser has clearly efficiently removed the extended emission from the Galactic dust. Nevertheless, very compact Galactic dust regions and cirrus knots are still present in the map, and our final catalogues will contain compact Galactic sources, such as debris disks (Thompson et al 2010).…”

Section: Map Makingmentioning

confidence: 99%

“…The H-ATLAS survey is therefore useful both to astronomers studying the nearby Universe and to those studying the early (z > 1) Universe. The large area of the survey means that there are also potential uses for it in Galactic astronomy (Eales et al 2010), with one practical example being a search for debris disks around stars (Thompson et al 2010).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

TheHerschel -ATLAS data release 1 – I. Maps, catalogues and number counts

Valiante

Smith

Eales

et al. 2016

Mon. Not. R. Astron. Soc.

Self Cite

201

291

View full text Add to dashboard Cite

We present the first major data release of the largest single key-project in area carried out in open time with the Herschel Space Observatory. The Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) is a survey of 600 deg 2 in five photometric bands -100, 160, 250, 350 and 500 µm -with the PACS and SPIRE cameras. In this paper and a companion paper (Bourne et al. 2016) we present the survey of three fields on the celestial equator, covering a total area of 161.6 deg 2 and previously observed in the Galaxy and Mass Assembly (GAMA) spectroscopic survey. This paper describes the Herschel images and catalogues of the sources detected on the SPIRE 250 µm images. The 1σ noise for source detection, including both confusion and instrumental noise, is 7.4, 9.4 and 10.2 mJy at 250, 350 and 500 µm. Our catalogue includes 120230 sources in total, with 113995, 46209 and 11011 sources detected at > 4σ at 250, 350 and 500 µm. The catalogue contains detections at > 3σ at 100 and 160 µm for 4650 and 5685 sources, and the typical noise at these wavelengths is 44 and 49 mJy. We include estimates of the completeness of the survey and of the effects of flux bias and also describe a novel method for determining the true source counts. The H-ATLAS source counts are very similar to the source counts from the deeper HerMES survey at 250 and 350 µm, with a small difference at 500 µm. Appendix A provides a quick start in using the released datasets, including instructions and cautions on how to use them.

show abstract

Section: Map Makingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

TheHerschel -ATLAS data release 1 – I. Maps, catalogues and number counts

Valiante

Smith

Eales

et al. 2016

Mon. Not. R. Astron. Soc.

Self Cite

201

291

View full text Add to dashboard Cite

show abstract

“…We might still expect a correlation between optical and submm fluxes because the dust emission in these systems is simply reprocessed starlight, and also because the flux in both wavebands depends on distance. However, there is a large amount of scatter in the masses and temperatures of debris discs around stars of a given spectral type (Hillenbrand et al 2008;Carpenter et al 2009), and H-ATLAS will detect only the brightest of these (Thompson et al 2010). The statistics of H-ATLAS-detected stars will therefore be highly stochastic and any correlation between submm detectability and optical magnitude is likely to be broken.…”

Section: Application To the Likelihood Ratiosmentioning

confidence: 99%

TheHerschel-ATLAS Data Release 1 – II. Multi-wavelength counterparts to submillimetre sources

Bourne

Dunne

Maddox

et al. 2016

Mon. Not. R. Astron. Soc.

Self Cite

113

View full text Add to dashboard Cite

This paper is the second in a pair of articles presenting data release 1 (DR1) of the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS), the largest single open-time key project carried out with the Herschel Space Observatory. The H-ATLAS is a wide-area imaging survey carried out in five photometric bands at 100, 160, 250, 350 and 500µm covering a total area of 600 deg 2 . In this paper we describe the identification of optical counterparts to submillimetre sources in DR1, comprising an area of 161 deg 2 over three equatorial fields of roughly 12 • × 4.5 • centred at 9 h , 12 h and 14.5 h respectively. Of all the H-ATLAS fields, the equatorial regions benefit from the greatest overlap with current multi-wavelength surveys spanning ultraviolet (UV) to mid-infrared regimes, as well as extensive spectroscopic coverage. We use a likelihoodratio technique to identify SDSS counterparts at r < 22.4 for 250-µm-selected sources detected at ≥ 4σ (≈28 mJy). We find 'reliable' counterparts (reliability R ≥ 0.8) for 44,835 sources (39 per cent), with an estimated completeness of 73.0 per cent and contamination rate of 4.7 per cent. Using redshifts and multi-wavelength photometry from GAMA and other public catalogues, we show that H-ATLAS-selected galaxies at z < 0.5 span a wide range of optical colours, total infrared (IR) luminosities, and IR/UV ratios, with no strong disposition towards mid-IR-classified AGN in comparison with optical selection. The data described herein, together with all maps and catalogues described in the companion paper (Valiante et al. 2016), are available from the H-ATLAS website at www.h-atlas.org.

show abstract

“…In total, about 600 deg 2 of extragalactic sky was mapped simultaneously with the PACS (Poglitsch et al 2010) and SPIRE (Griffin et al 2010) instruments in 5 bands centred at 100, 160, 250, 350 and 500 µm. The scientific goals of the H-ATLAS programme are diverse, ranging from the search for debris disks and the characterisation of the Galactic cirrus (Thompson et al 2010;Bracco et al 2011), statistical studies of the local and the high-redshift galaxy population (Dunne et al 2011;Lapi et al 2011;Smith et al 2012a), to the investigation of extreme objects like blazars and gravitational lenses (Negrello et al 2010;Cox et al 2011;Fu et al 2012;López-Caniego et al 2013).…”

mentioning

confidence: 99%

Dust energy balance study of two edge-on spiral galaxies in the Herschel-ATLAS survey

Geyter

Baes

Looze

et al. 2015

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

Interstellar dust in galaxies can be traced either through its extinction effects on the star light, or through its thermal emission at infrared wavelengths. Recent radiative transfer studies of several nearby edge-on galaxies have found an apparent inconsistency in the dust energy balance: the radiative transfer models that successfully explain the optical extinction underestimate the observed fluxes by an average factor of three. We investigate the dust energy balance for IC 4225 and NGC 5166, two edge-on spiral galaxies observed by the Herschel Space Observatory in the frame of the H-ATLAS survey. We start from models which were constrained from optical data and extend them to construct the entire spectral energy distribution of our galaxies. These predicted values are subsequently compared to the observed far-infrared fluxes. We find that including a young stellar population in the modelling is necessary as it plays a non-negligible part in the heating of the dust grains. While the modelling approach for both galaxies is nearly identical, we find two very different results. As is often seen in other edge-on spiral galaxies, the far-infrared emission of our radiative transfer model of IC 4225 underestimates the observed fluxes by a factor of about three. For NGC 5166 on the other hand, we find that both the predicted spectral energy distribution as well as the simulated images match the observations particularly well. We explore possible reasons for this difference and conclude that it is unlikely that one single mechanism is the cause of the dust energy balance problem in spiral galaxies. We discuss the different approaches that can be considered in order to get a conclusive answer on the origin this discrepancy.

show abstract

A search for debris disks in theHerschel-ATLAS

Cited by 16 publications

References 35 publications

TheHerschel -ATLAS data release 1 – I. Maps, catalogues and number counts

TheHerschel -ATLAS data release 1 – I. Maps, catalogues and number counts

TheHerschel-ATLAS Data Release 1 – II. Multi-wavelength counterparts to submillimetre sources

Dust energy balance study of two edge-on spiral galaxies in the Herschel-ATLAS survey

Contact Info

Product

Resources

About