Matches in SemOpenAlex for { <https://semopenalex.org/work/W3216753432> ?p ?o ?g. }
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- W3216753432 abstract "We present a Spitzer/IRAC survey of H-faint ($H_{160} gtrsim 26.4$, $<5sigma$) sources in 101 lensing cluster fields. Across a CANDELS/Wide-like survey area of $sim$648 arcmin$^2$ (effectively $sim$221 arcmin$^2$ in the source plane), we have securely discovered 53 sources in the IRAC Channel-2 band (CH2, 4.5 $mathrm{mu m}$; median CH2$=22.46pm0.11$ AB mag) that lack robust HST/WFC3-IR F160W counterparts. The most remarkable source in our sample, namely ES-009 in the field of Abell 2813, is the brightest H-faint galaxy at 4.5 $mathrm{mu m}$ known so far ($mathrm{CH2}=20.48pm0.03$ AB mag). We show that the H-faint sources in our sample are massive (median $M_mathrm{star} = 10^{10.3pm 0.3}$ $M_odot$), star-forming (median star formation rate $=100_{-40}^{+60}$ $M_odot$yr$^{-1}$) and dust-obscured ($A_V=2.6pm0.3$) galaxies around a median photometric redshift of $z=3.9pm0.4$. The stellar continua of 14 H-faint galaxies can be resolved in the CH2 band, suggesting a median circularized effective radius ($R_mathrm{e,circ}$; lensing corrected) of $1.9pm0.2$ kpc and $<1.5$ kpc for the resolved and whole samples, respectively. This is consistent with the sizes of massive unobscured galaxies at $zsim4$, indicating that H-faint galaxies represent the dusty tail of the distribution of a wider galaxy population. Comparing with the ALMA dust continuum sizes of similar galaxies reported previously, we conclude that the heavy dust obscuration in H-faint galaxies is related to the compactness of both stellar and dust continua ($R_mathrm{e,circ}sim 1$ kpc). These H-faint galaxies make up $16_{-7}^{+13}$% of the galaxies in the stellar mass range of $10^{10}-10^{11.2}$ $M_odot$ at $z=3sim5$, contributing to $8_{-4}^{+8}$% of the cosmic star formation rate density in this epoch and likely tracing the early phase of massive galaxy formation." @default.
- W3216753432 created "2021-12-06" @default.
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- W3216753432 date "2021-11-25" @default.
- W3216753432 modified "2023-10-11" @default.
- W3216753432 title "Extensive Lensing Survey of Optical and Near-infrared Dark Objects (El Sonido): HST H-faint Galaxies behind 101 Lensing Clusters" @default.
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