Early Science with the Large Millimeter Telescope: Constraining the Gas Fraction of a Compact Quiescent Galaxy at z = 1.883

Caliendo, Joyce; Whitaker, Katherine E.; Akhshik, Mohammad; Wilson, Grant; Williams, Christina C.; Spilker, Justin; Mahler, Guillaume; Pope, Alexandra; Sharon, Keren; Aguilar, E.; Bezanson, Rachel; Dagostino, Miguel Chávez; Gómez-Ruiz, Arturo I.; Montaña, Alfredo; Toft, Sune; Rosa, Miguel Velazquez de la; Zeballos, M.

doi:10.3847/2041-8213/abe132

Cited by 25 publications

(31 citation statements)

References 46 publications

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“…consistent with the main sequence behavior (Caliendo et al 2021;Whitaker et al 2014;Danielson et al 2017).…”

Section: Sedsupporting

confidence: 83%

“…We have derived physical properties from the SED using MAGPHYS. Comparing the stellar mass with the star formation rate, we find that this galaxy lies on the main sequence of the star-forming galaxies at z ∼ 1.5 (Caliendo et al 2021;Whitaker et al 2014;Danielson et al 2017). The sSFR also agrees with the main sequence of star-forming galaxies at this redshift (Sun et al 2021;Dudzevičiūtė et al 2020).…”

Section: Discussionsupporting

confidence: 58%

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The Einstein ring GAL-CLUS-022058s: a Lensed Ultrabright Submillimeter Galaxy at z=1.4796

Díaz-Sánchez,

Dannerbauer,

Sulzenauer

et al. 2021

Preprint

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We report an ultra-bright lensed submillimeter galaxy at z spec = 1.4796, identified as a result of a full-sky cross-correlation of the AllWISE and Planck compact source catalogs aimed to search for bright submillimeter galaxies at z ∼ 1.5 − 2.8. APEX/LABOCA observations of the candidate galaxy reveal a source with flux (S 870µm = 54 ± 8 mJy). The position of the APEX source coincides with the position of the AllWISE mid-IR source, and with the Einstein ring GAL-CLUS-022058s, observed with the HST. Archival VLT/FORS observations reveal the redshift of this Einstein ring, z spec = 1.4796, and detection of the CO(5-4) line at z spec = 1.4802 with APEX/nFLASH230 confirms the redshift of the submillimeter emission. The lensed source appears to be gravitationally magnified by a massive foreground galaxy cluster lens at z = 0.36. We use Lenstool to model the gravitational lensing, which is near to a "fold arc" configuration for an elliptical mass distribution of the central halo, where four images of the lensed galaxy are seen; the mean magnification is µ L = 18 ± 4. We have determined an intrinsic rest-frame infrared luminosity of L IR ≈ 10 12 L and a likely star formation rate of ∼ 70 − 170 M yr −1 . The molecular gas mass is M mol ∼ 2.6 × 10 10 M and the gas fraction is f = 0.34 ± 0.07. We also obtain a stellar mass log(M * /M ) = 10.7 ± 0.1 and a specific star formation rate log(sSF R/Gyr −1 ) = 0.15 ± 0.03. This galaxy lies on the so-called main sequence of star-forming galaxies at this redshift.

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“…consistent with the main sequence behavior (Caliendo et al 2021;Whitaker et al 2014;Danielson et al 2017).…”

Section: Sedsupporting

confidence: 83%

Section: Discussionsupporting

confidence: 58%

The Einstein ring GAL-CLUS-022058s: a Lensed Ultrabright Submillimeter Galaxy at z=1.4796

Díaz-Sánchez,

Dannerbauer,

Sulzenauer

et al. 2021

Preprint

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“…The REQUIEM-2D galaxy survey targets 8 strongly lensed quiescent galaxies with redshifts of 1.6 < z < 2.9 and demagnified stellar masses of 10.6 < log M * /M < 12 (see Figures 1 and 2 and also, Akhshik et al 2020, HST-GO-15663; PI: M. Akhshik). The pilot target of the survey, MRG-S0851 (HST-GO-14622; PI: K. E. Whitaker), has been studied in Akhshik et al (2020Akhshik et al ( , 2021 and Caliendo et al (2021). Therein, we built and extensively tested our methodology on mock observations as well as the pilot target.…”

Section: Data Reductionmentioning

confidence: 99%

“…Herein, we present the analyses of the 7 targets from the REQUIEM-2D survey; a detailed study of the REQUIEM-2D's pilot target, MRG-S0851 is presented elsewhere (Akhshik et al 2020(Akhshik et al , 2021Caliendo et al 2021). We summarize the data reduction in Section 2, and present the analysis in Sections 3.1 and 3.2, referring the reader to Akhshik et al (2020) for a more in depth discussion of the adopted methodology.…”

Section: Introductionmentioning

confidence: 99%

REQUIEM-2D: A diversity of formation pathways in a sample of spatially-resolved massive quiescent galaxies at z~2

Akhshik¹,

Whitaker²,

Leja³

et al. 2022

Preprint

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REQUIEM-2D (REsolving QUIEscent Magnified galaxies with 2D grism spectroscopy) is comprised of a sample of 8 massive (log M * /M > 10.6) strongly lensed quiescent galaxies at z ∼ 2. REQUIEM-2D combines the natural magnification from strong gravitational lensing with the high spatial-resolution grism spectroscopy of Hubble Space Telescope through a spectrophotometric fit to study spatially resolved stellar populations. We show that quiescent galaxies in the REQUIEM-2D survey have diverse formation histories manifesting as a gradient in stellar ages, including examples of (1) a younger central region supporting outside-in formation, (2) flat age gradients that show evidence for both spatially-uniform early formation or inside-out quenching, and (3) regions at a fixed radial distance having different ages (such asymmetries cannot be recovered when averaging stellar population measurements azimuthally). The typical dust attenuation curve for the REQUIEM-2D galaxies is constrained to be steeper than Calzetti's law in the UV and generally consistent with A V < 1. Combined together and accounting for the different physical radial distances and formation time-scales,

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“…Gobat et al 2018;Magdis et al 2021), in apparent contradiction with low or absent M H2 in individual galaxies (e.g. Caliendo et al 2021;Williams et al 2021;Whitaker et al 2021). One possible interpretation is that these stacks include a subset of H 2 -rich recently quenched (t q 200 Myr) galaxies averaged with a depleted majority.…”

Section: Discussionmentioning

confidence: 97%

Now you see it, now you don't: Star formation truncation precedes the loss of molecular gas by ~100 Myr in massive post-starburst galaxies at z~0.6

Bezanson,

Spilker,

Suess

et al. 2021

Preprint

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We use ALMA observations of CO(2-1) in 13 massive (M * ∼ > 10 11 M ) post-starburst galaxies at z ∼ 0.6 to constrain the molecular gas content in galaxies shortly after they quench their major star-forming episode. The post-starburst galaxies in this study are selected from the Sloan Digital Sky Survey spectroscopic samples (DR14) based on their spectral shapes, as part of the SQuIGG LE program. Early results showed that two post-starburst galaxies host large H 2 reservoirs despite their low inferred star formation rates. Here we expand this analysis to a larger statistical sample of 13 galaxies. Six of the primary targets (45%) are detected, with M H2 ∼ > 10 9 M . Given their high stellar masses, this mass limit corresponds to an average gas fraction of f H2 ≡ M H2 /M * ∼ 7%, or ∼14% using lower stellar masses estimates derived from analytic, exponentially declining star formation histories. The gas fraction correlates with the D n 4000 spectral index, suggesting that the cold gas reservoirs decrease with time since burst, as found in local K+A galaxies. Star formation histories derived from flexible stellar population synthesis modeling support this empirical finding: galaxies that quenched 150 Myr prior to observation host detectable CO(2-1) emission, while older post-starburst galaxies are undetected. The large H 2 reservoirs and low star formation rates in the sample imply that the quenching of star formation precedes the disappearance of the cold gas reservoirs. However, within the following 100-200 Myrs, the SQuIGG LE galaxies require the additional and efficient heating or removal of cold gas to bring their low star formation rates in line with standard H 2 scaling relations.

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Early Science with the Large Millimeter Telescope: Constraining the Gas Fraction of a Compact Quiescent Galaxy at z = 1.883

Cited by 25 publications

References 46 publications

The Einstein ring GAL-CLUS-022058s: a Lensed Ultrabright Submillimeter Galaxy at z=1.4796

The Einstein ring GAL-CLUS-022058s: a Lensed Ultrabright Submillimeter Galaxy at z=1.4796

REQUIEM-2D: A diversity of formation pathways in a sample of spatially-resolved massive quiescent galaxies at z~2

Now you see it, now you don't: Star formation truncation precedes the loss of molecular gas by ~100 Myr in massive post-starburst galaxies at z~0.6

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