J/ApJS/278/15 Star Formation History of FUDS0 galaxies (Xi+, 2025)
FAST Ultra-Deep Survey (FUDS): the star formation histories of FUDS0 galaxies.
Xi H., Staveley-Smith L., Peng Bo, For B.-Q., Liu B., Ding D.
<Astrophys. J. Suppl. Ser., 278, 15 (2025)>
=2025ApJS..278...15X 2025ApJS..278...15X
ADC_Keywords: Galaxies, spectra; Optical; Redshifts; H I data; Surveys
Keywords: Late-type galaxies ; Galaxies ; High-redshift galaxies ;
Galaxy evolution ; Sky surveys
Abstract:
We present the ultraviolet, optical, and infrared counterparts of
128 galaxies detected in neutral hydrogen (HI) in the FAST Ultra-Deep
Survey (FUDS) field 0 (FUDS0). HI mass upper limits are also
calculated for 134 non-detections in the field. Stellar masses (M*),
star formation rates (SFRs), and star formation histories are computed
by fitting spectral energy distributions using ProSpect. The results
show that HI-selected galaxies prefer recent long-lasting, but mild
star formation activity, while HI non-detections have earlier and more
intense star formation activity. Based on their distribution on the
SFR versus M* diagram, the typical evolution of HI-selected galaxies
follows three distinct stages: (i) early stage: the total SFR
increases, though the specific SFR decreases from 10-8 to 10-9/yr;
(ii) mass accumulation stage: the SFR is steady, and stellar mass
increase linearly with time; (iii) quenching stage: star formation
activity quenches on a rapid timescale and at constant stellar mass.
37 non-detections are located on the star-forming main sequence, but
are not detected in HI due to low sensitivity close to the field edges
or close to strong radio frequency interference. Comparisons with the
existing optical, optically selected HI, and HI catalogs show a good
agreement with respect to measured M* and SFR, with minor
discrepancies due to selection effects. The ongoing full FUDS survey
will help us better explore the evolutionary stages of HI galaxies
through a larger sample.
Description:
The pilot survey field, FUDS0 (Xi+ 2024, J/ApJS/274/18), is located at
(RAJ2000,DEJ2000)=(124.3°,22.18°) to partially overlap with
the GAL2577 field in the Arecibo Ultra-Deep Survey (AUDS;
Xi+ 2021, J/MNRAS/501/4550) survey for verifying the data quality.
Observations were taken between 2019-August-25 and 2020-May-22. The
rms noise in the final data cube is ∼50uJy/beam at a frequency
resolution of 22.9kHz around the central area in the field, with an
increase toward the edges due to less sampling. In the FUDS0 survey,
128 HI galaxies were detected with redshifts up to z∼0.4.
In this paper, we derive the physical properties of FUDS0 galaxies by
fitting their spectral energy distributions (SEDs) in the UV, optical,
and IR bands. Due to the large beam size of single-dish telescopes,
spectroscopic redshifts are essential for identifying optical
counterparts, and optical images are essential for providing accurate
positions. The FUDS0 field is in the footprint of the SDSS survey.
In SDSS DR15, the spectra of bright galaxies are measured from 3800 to
9200Å with a wavelength resolution of R∼1850. Additionally, deeper
spectroscopic observations are available from the AUDS optical catalog
(AUDSOC; Hoppmann 2014, PhD thesis Univ. of Western Australia) using
the Anglo-Australian Telescope, which overlaps with the FUDS0 field.
Additionally, some of the SDSS galaxies in the FUDS0 field have
redshifts from Dark Energy Spectroscopic Instrument (DESI) spectra or
new spectroscopic observations with Keck:I, Hale, or Big Telescope
Alt-azimuth (BTA; Xi+ 2024ApJ...966L..36X 2024ApJ...966L..36X).
In total, there are 118 FUDS0 galaxies associated with either SDSS or
DESI sources. See Section 2 for further details.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 86 128 The optical properties of FUDS0 galaxies
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See also:
VIII/73 : HI Parkes All Sky Survey Catalogue (HIPASS) (Meyer+, 2004)
VIII/89 : Northern HI Parkes All Sky Survey Catalogue (HIPASS) (Wong+, 2006)
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
II/328 : AllWISE Data Release (Cutri+ 2013)
II/335 : Revised cat. of GALEX UV sources (GUVcat_AIS GR6+7) (Bianchi+ 2017)
II/363 : The band-merged unWISE Catalog (Schlafly+, 2019)
V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)
VII/292 : DESI Legacy Imaging Surveys DR8 photometric redshifts (Duncan, 2022)
V/161 : DESI DR1 redshift catalog (DESI Col.+ 2025)
J/MNRAS/403/683 : GALEX Arecibo SDSS survey (GASS) (Catinella+, 2010)
J/AJ/139/315 : HI-selected galaxies in SDSS. Optical data (West+, 2010)
J/ApJ/792/30 : NEOWISE magnitudes for near-Earth objects (Mainzer+, 2014)
J/MNRAS/460/2143 : HI size-mass relation of galaxies (Wang+, 2016)
J/MNRAS/476/875 : xGASS catalog (Catinella+, 2018)
J/ApJ/859/11 : The GALEX-SDSS-WISE Legacy Cat. 2 (GSWLC-2) (Salim+, 2018)
J/ApJ/861/49 : ALFALFA extragalactic HI source catalog (Haynes+, 2018)
J/MNRAS/489/5723 : ASKAP HI imaging of the Lyon Group of Gal. 351 (For+, 2019)
J/AJ/160/271 : ∼30000 galaxies with ALFALFA-SDSS (Durbala+, 2020)
J/MNRAS/501/4550 : The complete Arecibo Ultra-Deep Survey (Xi+, 2021)
J/ApJS/274/18 : FAST Ultra-Deep Survey: Data Release for FUDS0 (Xi+, 2024)
http://salims.pages.iu.edu/gswlc/ : GALEX-SDSS-WISE Legacy (GSWLC) catalog
http://skyserver.sdss.org/dr19 : SDSS home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- ID FUDS0 galaxy identifier from
Xi+ 2024, J/ApJS/274/18
6- 7 I2 h RAh [8]? Hour of Right Ascension (J2000)
9- 10 I2 min RAm [15/19]? Minute of Right Ascension (J2000)
12- 16 F5.2 s RAs ? Second of Right Ascension (J2000)
18 A1 --- DE- Sign of the Declination (J2000)
19- 20 I2 deg DEd [21/22]? Degree of Declination (J2000)
22- 23 I2 arcmin DEm ? Arcminute of Declination (J2000)
25- 28 F4.1 arcsec DEs ? Arcsecond of Declination (J2000)
29 A1 --- n_ID [n] n=no optical counterpart
(10 occurrences); flag added by CDS
31- 37 F7.5 --- z [0.007/0.41]? Spectroscopic redshift
39- 40 I2 --- e_z [1/20]? The 1σ uncertainty in z
42- 52 A11 --- Flag Flux measurement availability flag (1)
54- 58 F5.2 [Msun] logMs [6.9/11.5]? Log stellar mass (2)
60- 63 F4.2 [Msun] e_logMs [0.05/0.4]? The 1σ uncertainty in
logMs (3)
65- 69 F5.2 [Msun/yr] logSFR [-2.8/1.4]? Log star formation rate (2)
71- 74 F4.2 [Msun/yr] e_logSFR [0.03/1.4]? The 1σ uncertainty in
logSFR (3)
76- 81 F6.2 [yr-1] logsSFR [-11.9/-8.26]? Log specific star formation
rate (2)
83- 86 F4.2 [yr-1] e_logsSFR [0.05/1.5]? The 1σ uncertainty in
logsSFR (3)
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Note (1): The availability of flux measurements from FUV, NUV, u, g, r, i, z,
W1, W2, W3, and W4 bands with T for True and F for False.
Note (2): from SED fitting by ProSpect, adjusted by comparing with
the GALEX-SDSS-WISE Legacy Catalog (GSWLC-2; Salim+ 2018, J/ApJ/859/11)
catalog. The stellar mass and star formation rate units are scaled by
h702.
Note (3): These 1σ uncertainties are estimated using the half of
differences between the 15.86 and 84.13 percentiles. For the cases
where the 15.86 percentiles do not exist (negative infinity), the
differences between the 50.0 and 84.13 percentiles are used.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 11-Feb-2026