A first look at a complete view of spatially resolved star formation at 1<z<1.8 with JWST NGDEEP+FRESCO slitless spectroscopy

Abstract

[abridged] The previously inaccessible star formation tracer Pa$\alpha$ can now be spatially resolved by JWST NIRCam slitless spectroscopy in distant galaxies up to cosmic noon. In the first study of its kind, we combine JWST NGDEEP NIRISS and FRESCO NIRCam slitless spectroscopy to provide the first direct comparison of spatially resolved dust-obscured (traced by Pa$\alpha$) versus unobscured (traced by H$\alpha$) star formation across the main sequence. We stack Pa$\alpha$ and H$\alpha$ emission-line maps, along with stellar continuum images at both wavelengths of 31 galaxies at 1<z<1.8 in three bins of stellar mass. Surface brightness profiles are measured and equivalent width (EW) profiles computed. Increasing Pa$\alpha$ and H$\alpha$ EW profiles with galactocentric radius across all stellar masses probed provide direct evidence for the inside-out growth of galaxies both via dust-obscured and unobscured star formation for the first time. For galaxies on the main sequence, a weakly positive ($0.1\pm 0.1$) Pa$\alpha$/H$\alpha$ line profile as a function of radius is found at $8.8⩽\log (M_{\ast }/{\mathrm{M}}_{\odot })<9.9$ with a negative ($-0.4\pm 0.1$) Pa$\alpha$/H$\alpha$ line profile found at $9.9⩽\log (M_{\ast }/{\mathrm{M}}_{\odot })<11.0$. Low mass galaxies ($7.7⩽\log (M_{\ast }/{\mathrm{M}}_{\odot })<8.8$) with high sSFRs are found to have a negative ($-0.5\pm 0.1$) Pa$\alpha$/H$\alpha$ line profile gradient. Our results demonstrate that while inside-out growth via star formation is ubiquitous across the main sequence just after cosmic noon, centrally concentrated dust attenuation is not. Along with other recent work in the literature, our findings motivate future studies of resolved SFR profiles in large samples of individual cosmic noon galaxies across the main sequence, to understand the intrinsic scatter in spatially resolved star formation.

arXiv comment7 pages, 7 figures, to be submitted to A&A

References in corpus (52)

• Planck 2015 results. XIII. Cosmological parameters
• Star Formation in Galaxies Along the Hubble Sequence
• The Dust Content and Opacity of Actively Star-Forming Galaxies
• Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
• Star Formation in the Milky Way and Nearby Galaxies
• CANDELS: The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey
• CANDELS: The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey - The Hubble Space Telescope Observations, Imaging Data Products and Mosaics
• The propagation of uncertainties in stellar population synthesis modeling I: The relevance of uncertain aspects of stellar evolution and the IMF to the derived physical properties of galaxies
• CIGALE: a python Code Investigating GALaxy Emission
• The propagation of uncertainties in stellar population synthesis modeling III: model calibration, comparison, and evaluation
• The SINS survey: SINFONI Integral Field Spectroscopy of z ~ 2 Star-forming Galaxies
• Constraining the Low-Mass Slope of the Star Formation Sequence at 0.5<z<2.5
• On Star Formation Rates and Star Formation Histories of Galaxies out to z ~ 3
• The Main Sequence of star-forming galaxies across cosmic times
• Dust extinction from Balmer decrements of star-forming galaxies at 0.75<z<1.5 with HST/WFC3 spectroscopy from the WISP survey
• A CANDELS - 3D-HST Synergy: Resolved Star Formation Patterns at 0.7 < z < 1.5
• Where stars form: inside-out growth and coherent star formation from HST Halpha maps of 2676 galaxies across the main sequence at z~1
• The FMOS-COSMOS survey of star-forming galaxies at z ~ 1.6. I. Hα-based star formation rates and dust extinction
• Empirical determination of the shape of dust attenuation curves in star-forming galaxies
• Direct measurements of dust attenuation in z~1.5 star-forming galaxies from 3D-HST: Implications for dust geometry and star formation rates
• The MOSDEF Survey: Dissecting the star-formation rate vs. stellar mass relation using H$\alpha$ and H$\beta$ emission lines at z ~ 2
• A New Star-Formation Rate Calibration from Polycyclic Aromatic Hydrocarbon Emission Features and Application to High Redshift Galaxies
• Spatially-resolved dust maps from Balmer decrements in galaxies at z~1.4
• Mapping dust through emission and absorption in nearby galaxies
• Spatially resolved Halpha maps and sizes of 57 strongly star-forming galaxies at z~1 from 3D-HST: evidence for rapid inside-out assembly of disk galaxies
• The zCOSMOS-SINFONI Project I: Sample Selection and Natural-Seeing Observations
• Convolution kernels for multi-wavelength imaging
• MOIRCS Deep Survey. VI. Near-Infrared Spectroscopy of K-Selected Star-Forming Galaxies at z~2
• Dust Attenuation, Star Formation, and Metallicity in z ~ 2-3 Galaxies from KBSS-MOSFIRE
• AGN Selection and Demographics in GOODS-S/HUDF from X-ray to Radio
• CLEAR: The Gas-Phase Metallicity Gradients of Star-Forming Galaxies at 0.6 < z < 2.6
• Nebular Attenuation in Hα-selected Star-forming Galaxies at z=0.8 from the NewHα Survey
• The regulation of galaxy growth along the size-mass relation by star-formation, as traced by H$\alpha$ in KMOS${}^{3D}$ galaxies at 0.7 < z < 2.7
• The MOSDEF Survey: The strong agreement between H-alpha and UV-to-FIR star formation rates for z~2 star-forming galaxies
• Paschen-line Constraints on Dust Attenuation and Star Formation at z~1-3 with JWST/NIRSpec
• The MOSDEF Survey: Implications of the Lack of Evolution in the Dust Attenuation-Mass Relation to z~2
• On the different levels of dust attenuation to nebular and stellar light in star-forming galaxies
• The first large catalogue of spectroscopic redshifts in Webb's First Deep Field, SMACS J0723.3$-$7327
• SDSS-IV MaNGA: spatially resolved dust attenuation in spiral galaxies
• A First Look at Spatially Resolved Balmer Decrements at $1.0<z<2.4$ from JWST NIRISS Slitless Spectroscopy
• JADES: Balmer Decrement Measurements at redshifts 4 < z < 7
• HST/WFC3 grism observations of $z\sim 1$ clusters: Evidence for rapid outside-in environmental quenching from spatially resolved H$\alpha$ maps
• Probing the Star Formation History and Initial Mass Function of the z~2.5 Lensed Galaxy SMM J163554.2+661225 with Herschel
• CEERS: Spatially Resolved UV and mid-IR Star Formation in Galaxies at 0.2 < z < 2.5: The Picture from the Hubble and James Webb Space Telescopes
• CEERS: MIRI deciphers the spatial distribution of dust-obscured star formation in galaxies at $0.1<z<2.5$
• Paschen-alpha Emission in the Gravitationally Lensed Galaxy SMM J163554.2+661225
• CLEAR: The Evolution of Spatially Resolved Star Formation in Galaxies between $0.5\lesssim z\lesssim 1.7$ using H$\alpha$ Emission Line Maps
• A First Look at Spatially Resolved Star Formation at $4.8<z<6.5$ with JWST FRESCO NIRCam Slitless Spectroscopy
• Across the Green Valley with HST grisms: colour evolution, crossing time-scales and the growth of the red sequence at $z=1.0-1.8$
• Differential attenuation in star-forming galaxies at 0.3 $\lesssim$ $z$ $\lesssim$ 1.5 in the SHARDS/CANDELS field
• NGDEEP: The Star Formation and Ionization Properties of Galaxies at $1.7<z<3.4$
• The JWST Emission Line Survey (JELS): The sizes and merger fraction of star-forming galaxies during the Epoch of Reionization

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