2016A&A...587A..73B


Query : 2016A&A...587A..73B

2016A&A...587A..73B - Astronomy and Astrophysics, volume 587A, 73-73 (2016/3-1)

Measures of galaxy dust and gas mass with Herschel photometry and prospects for ALMA.

BERTA S., LUTZ D., GENZEL R., FOERSTER-SCHREIBER N.M. and TACCONI L.J.

Abstract (from CDS):

Combining the deepest Herschel extragalactic surveys (PEP, GOODS-H, HerMES), and Monte Carlo mock catalogs, we explore the robustness of dust mass estimates based on modeling of broadband spectral energy distributions (SEDs) with two popular approaches: Draine & Li (2007ApJ...657..810D; DL07) and a modified blackbody (MBB). We analyze the cause, drivers, and trends of uncertainties and systematics in thorough detail. As long as the observed SED extends to at least 160-200 µm in the rest frame, Mdust can be recovered with a >3σ significance and without the occurrence of systematics. An average offset of a factor ∼1.5 exists between DL07- and MBB-based dust masses, based on consistent dust properties. The performance of DL07 modeling turns out to be more robust than that of MBB since relative errors on Mdust are more mildly dependent on the maximum covered rest-frame wavelength and are less scattered. At the depth of the deepest Herschel surveys (in the GOODS-S field), it is possible to retrieve dust masses with a signal-to-noise ratio, S/N ≥3 for galaxies on the main sequence of star formation (MS) down to M*∼1010[M] up to z∼1. At higher redshift (z≤2), the same result is only achieved for objects at the tip of the MS or for those objects lying above the tip owing to sensitivity and wavelength coverage limitations. Molecular gas masses, obtained by converting Mdust through the metallicity-dependent gas-to-dust ratio δGDR, are consistent with those based on the scaling of depletion time, τdep, and on CO sub-mm spectroscopy. Focusing on CO-detected galaxies at z>1, the δGDR dependence on metallicity is consistent with the local relation, provided that a sufficient SED coverage is available. Once we established that Herschel-only and sub-mm-only estimates of dust masses can be affected by large uncertainties and possibly systematics in some cases, we combined far-IR Herschel data and sub-mm ALMA expected fluxes to study the advantages of a full SED coverage. The uncertainty on Mdust reduces to <30% for more than 85% of Herschel galaxies, thus potentially facilitating a fast statistical study of Mdust,gas for large samples, at least up to z ∼2.

Abstract Copyright:

Journal keyword(s): infrared: galaxies - submillimeter: galaxies - galaxies: high-redshift - galaxies: star formation - radiation mechanisms: thermal

CDS comments: HDF 242 and HDF 169 are respectively NAME SMM J123707.2+621408 and NAME SMM J123635+621237 in Simbad.

Simbad objects: 21

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Number of rows : 21
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 10197 1
2 NAME SXDSF reg 02 18 00 -05 00.0           ~ 204 1
3 NAME GOODS Southern Field reg 03 32 28.0 -27 48 30           ~ 1185 1
4 NAME Extended Chandra Deep Field South reg 03 32 30.0 -27 48 20           ~ 697 0
5 NAME Hubble Ultra Deep Field reg 03 32 39.0 -27 47 29           ~ 1463 0
6 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15995 1
7 [DB2002b] G236.96-5.04 MoC 07 18 13 -23 38.8           ~ 15 0
8 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 2500 0
9 NAME Lockman Hole East Field reg 10 52 08.82 +57 21 33.8           ~ 38 0
10 NAME SMM J123635+621237 EmG 12 36 34.52 +62 12 41.0 25.26 23.8632 24.53 23.18 22.7131 ~ 111 0
11 NAME Hubble Deep Field reg 12 36 49.5 +62 12 58           ~ 1873 1
12 NAME GOODS-N Field reg 12 36 55.0 +62 14 15           ~ 1021 1
13 NAME SMM J123707.2+621408 AGN 12 37 07.19 +62 14 08.0 28.12 26.8993 26.6 25.6 25.3860 ~ 104 0
14 NAME BzK 21000 rG 12 37 10.63 +62 22 34.7 23.93 25.0574     23.7554 ~ 50 0
15 NAME SMM J123711+622212 AGN 12 37 11.92 +62 22 12.1   27.1786 25.185   24.4196 ~ 177 0
16 SSA 13 reg 13 12 16.5 +42 44 39           ~ 104 0
17 NAME Subaru Deep Field NGP reg 13 24 21.3 +27 29 23           ~ 314 1
18 NAME Extended Groth Strip reg 14 19 +52.8           ~ 662 0
19 ELAIS N2 reg 16 36 48.0 +41 01 45           ~ 163 0
20 NAME Cosmic Eye G 21 35 12.730 -01 01 42.90           ~ 85 0
21 SSA 22 reg 22 17 34.7 +00 15 07           ~ 296 0

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2022.05.24-11:20:08

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