The ASTRODEEP Frontier Fields catalogues

Criscienzo, M. Di; Merlin, E.; Castellano, M.; Santini, P.; Fontana, A.; Amorín, R.; Boutsia, K.; Derriére, S.; Dunlop, James; Elbaz, D.; Grazian, A.; McLure, R. J.; Mármol-Queraltó, E.; Michałowski, M. J.; Mortlock, S.; Parsa, S.; Pentericci, L.

doi:10.1051/0004-6361/201731172

Cited by 37 publications

(51 citation statements)

References 37 publications

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“…All subsequent observations were performed with no rotation of the instrument between science and sky DITs. ‡ Target selection in these clusters was primarily done from preliminary versions of the ASTRODEEP catalogues (Castellano et al 2016;Merlin et al 2016;Di Criscienzo et al 2017), which did not include Spitzer/IRAC photometry. Due to a high proper motion reference star, some of the observations of RXJ2248 were taken at a slight offset from the required target centre, reducing the total exposure at that position.…”

Section: Target Selectionmentioning

confidence: 99%

Inferences on the timeline of reionization at z ∼ 8 from the KMOS Lens-Amplified Spectroscopic Survey

Mason

Fontana

Treu

et al. 2019

Monthly Notices of the Royal Astronomical Society

217

155

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Detections and non-detections of Lyman alpha (Lyα) emission from z > 6 galaxies (< 1 Gyr after the Big Bang) can be used to measure the timeline of cosmic reionization. Of key interest to measuring reionization's mid-stages, but also increasing observational challenge, are observations at z > 7, where Lyα redshifts to near infra-red wavelengths. Here we present a search for z > 7.2 Lyα emission in 53 intrinsically faint Lyman Break Galaxy candidates, gravitationally lensed by massive galaxy clusters, in the KMOS Lens-Amplified Spectroscopic Survey (KLASS). With integration times of ∼ 7 − 10 hours, we detect no Lyα emission with S/N > 5 in our sample. We determine our observations to be 80% complete for 5σ spatially and spectrally unresolved emission lines with integrated line flux > 5.7 × 10 −18 erg s −1 cm −2 . We define a photometrically selected sub-sample of 29 targets at z = 7.9 ± 0.6, with a median 5σ Lyα EW limit of 58Å. We perform a Bayesian inference of the average intergalactic medium (IGM) neutral hydrogen fraction using their spectra. Our inference accounts for the wavelength sensitivity and incomplete redshift coverage of our observations, and the photometric redshift probability distribution of each target. These observations, combined with samples from the literature, enable us to place a lower limit on the average IGM neutral hydrogen fraction of > 0.76 (68%), > 0.46 (95%) at z ∼ 8, providing further evidence of rapid reionization at z ∼ 6 − 8. We show that this is consistent with reionization history models extending the galaxy luminosity function to M uv ∼ < − 12, with low ionizing photon escape fractions, f esc ∼ < 15%.

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Section: Target Selectionmentioning

confidence: 99%

Inferences on the timeline of reionization at z ∼ 8 from the KMOS Lens-Amplified Spectroscopic Survey

Mason

Fontana

Treu

et al. 2019

Monthly Notices of the Royal Astronomical Society

217

155

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“…Stellar properties catalogues contain the same information as catalogues released by (Castellano et al 2016, Di Criscienzo et al 2017). In particular::…”

Section: Discussionmentioning

confidence: 99%

“…Our data analysis closely follow the procedures outlined in Merlin et al (2016a), Castellano et al (2016), Di Criscienzo et al (2017), Huang et al (2016b). For completeness, we briefly outline the procedure below.…”

Section: Data Analysis and Cataloguesmentioning

confidence: 99%

“…The main high level science products that make rich data sets such as those in the HFFs even more useful for the community are photometric catalogues that combine all the available imaging in a consistent manner. Photometric catalogues for the first four clusters have been published and provided to the community (Merlin et al 2016a, Castellano et al 2016, Di Criscienzo et al 2017. In collaboration with the ASTRODEEP team, we provide equivalent catalogues for the last two HFF clusters Abell 370 (hereafter A370) and RXC J2248.7−4431 (hereafter RXJ2248) using almost identical methods to those employed for the first four HFF clusters (Merlin et al 2016a, Castellano et al 2016, Di Criscienzo et al 2017, Santini et al 2017.…”

Section: Introductionmentioning

confidence: 99%

“…Photometric catalogues for the first four clusters have been published and provided to the community (Merlin et al 2016a, Castellano et al 2016, Di Criscienzo et al 2017. In collaboration with the ASTRODEEP team, we provide equivalent catalogues for the last two HFF clusters Abell 370 (hereafter A370) and RXC J2248.7−4431 (hereafter RXJ2248) using almost identical methods to those employed for the first four HFF clusters (Merlin et al 2016a, Castellano et al 2016, Di Criscienzo et al 2017, Santini et al 2017. Though catalogues have also been published by Shipley et al (2018) for all six HFF clusters, the catalogues presented here use a different methodology for measuring photometry, photometric redshifts, and stellar properties; therefore they provide independent and complementary measurements.…”

Section: Introductionmentioning

confidence: 99%

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Hubble Frontier Field photometric catalogues of Abell 370 and RXC J2248.7−4431: multiwavelength photometry, photometric redshifts, and stellar properties

Bradač

Huang

Fontana

et al. 2019

Monthly Notices of the Royal Astronomical Society

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This paper presents multiwavelength photometric catalogues of the last two Hubble Frontier Fields (HFF), the massive galaxy clusters Abell 370 and RXC J2248.7−4431. The photometry ranges from imaging performed on the Hubble Space Telescope (HST) to ground based Very Large Telescope (VLT) and Spitzer /IRAC, in collaboration with the ASTRODEEP team, and using the ASTRODEEP pipeline. While the main purpose of this paper is to release the catalogues, we also perform, as a proof of concept, a brief analysis of z > 6 objects selected using drop-out method, as well as spectroscopically confirmed sources and multiple images in both clusters. While dropout methods yield a sample of high-z galaxies, the addition of longer wavelength data reveals that as expected the samples have substantial contamination at the ∼30-45% level by dusty galaxies at lower redshifts. Furthermore, we show that spectroscopic redshifts are still required to unambiguously determine redshifts of multiply imaged systems. Finally, the now publicly available ASTRODEEP catalogues were combined for all HFFs and used to explore stellar properties of a large sample of 20,000 galaxies across a large photometric redshift range. The powerful magnification provided by the HFF clusters allows for an exploration of the properties of galaxies with intrinsic stellar masses as low as M * 10 7 M and intrinsic star formation rates SFRs∼ 0.1-1M /yr at z > 6.

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Quantum Detectors in Generic Non Flat FLRW Space-Times

Rabochaya

Zerbini

2015

Int J Theor Phys

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A quantum field theoretical approach, in which a quantum probe is used to investigate the properties generic non-flat FLRW space-times is discussed. The probe is identified with a conformally coupled massless scalar field defined on a space-time with horizon and the procedure to investigate the local properties is realized by the use of Unruh-DeWitt detector and by the evaluation of the regularized quantum fluctuations. In the case of de Sitter space, the coordinate independence of our results is checked, and the Gibbons-Hawking temperature is recovered. A possible generalization to the electromagnetic probe is also briefly indicated.

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The ASTRODEEP Frontier Fields catalogues

Cited by 37 publications

References 37 publications

Inferences on the timeline of reionization at z ∼ 8 from the KMOS Lens-Amplified Spectroscopic Survey

Inferences on the timeline of reionization at z ∼ 8 from the KMOS Lens-Amplified Spectroscopic Survey

Hubble Frontier Field photometric catalogues of Abell 370 and RXC J2248.7−4431: multiwavelength photometry, photometric redshifts, and stellar properties

Quantum Detectors in Generic Non Flat FLRW Space-Times

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