2021A&A...656A..46M


Query : 2021A&A...656A..46M

2021A&A...656A..46M - Astronomy and Astrophysics, volume 656A, 46-46 (2021/12-1)

ALCHEMI, an ALMA Comprehensive High-resolution Extragalactic Molecular Inventory. Survey presentation and first results from the ACA array.

MARTIN S., MANGUM J.G., HARADA N., COSTAGLIOLA F., SAKAMOTO K., MULLER S., ALADRO R., TANAKA K., YOSHIMURA Y., NAKANISHI K., HERRERO-ILLANA R., MUHLE S., AALTO S., BEHRENS E., COLZI L., EMIG K.L., FULLER G.A., GARCIA-BURILLO S., GREVE T.R., HENKEL C., HOLDSHIP J., HUMIRE P., HUNT L., IZUMI T., KOHNO K., KONIG S., MEIER D.S., NAKAJIMA T., NISHIMURA Y., PADOVANI M., RIVILLA V.M., TAKANO S., VAN DER WERF P.P., VITI S. and YAN Y.T.

Abstract (from CDS):


Context. The interstellar medium is the locus of physical processes affecting the evolution of galaxies which drive or are the result of star formation activity, supermassive black hole growth, and feedback. The resulting physical conditions determine the observable chemical abundances that can be explored through molecular emission observations at millimeter and submillimeter wavelengths.
Aims. Our goal is to unveiling the molecular richness of the central region of the prototypical nearby starburst galaxy NGC 253 at an unprecedented combination of sensitivity, spatial resolution, and frequency coverage.
Methods. We used the Atacama Large Millimeter/submillimeter Array (ALMA), covering a nearly contiguous 289 GHz frequency range between 84.2 and 373.2 GHz, to image the continuum and spectral line emission at 1.6''(∼28 pc) resolution down to a sensitivity of 30 - 50 mK. This article describes the ALMA Comprehensive High-resolution Extragalactic Molecular Inventory (ALCHEMI) large program. We focus on the analysis of the spectra extracted from the 15'' (∼255 pc) resolution ALMA Compact Array data.
Results. We modeled the molecular emission assuming local thermodynamic equilibrium with 78 species being detected. Additionally, multiple hydrogen and helium recombination lines are identified. Spectral lines contribute 5 to 36% of the total emission in frequency bins of 50 GHz. We report the first extragalactic detections of C2H5OH, HOCN, HC3HO, and several rare isotopologues. Isotopic ratios of carbon, oxygen, sulfur, nitrogen, and silicon were measured with multiple species.Concluison. Infrared pumped vibrationaly excited HCN, HNC, and HC3N emission, originating in massive star formation locations, is clearly detected at low resolution, while we do not detect it for HCO+. We suggest high temperature conditions in these regions driving a seemingly "carbon-rich" chemistry which may also explain the observed high abundance of organic species close to those in Galactic hot cores. The Lvib/LIR ratio was used as a proxy to estimate a 3% contribution from the proto super star cluster to the global infrared emission. Measured isotopic ratios with high dipole moment species agree with those within the central kiloparsec of the Galaxy, while those derived from 13C/18O are a factor of five larger, confirming the existence of multiple interstellar medium components within NGC 253 with different degrees of nucleosynthesis enrichment. The ALCHEMI data set provides a unique template for studies of star-forming galaxies in the early Universe.

Abstract Copyright: © ESO 2021

Journal keyword(s): line: identification - galaxies: ISM - galaxies: individual: NGC 253 - galaxies: starburst - ISM: molecules - submillimeter: ISM

Simbad objects: 36

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Number of rows : 36
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 QSO B0003-066 BLL 00 06 13.89288482 -06 23 35.3353584   19.1   17.14   ~ 308 1
2 IC 10 G 00 20 23.16 +59 17 34.7   13.6 9.5     ~ 1082 0
3 QSO B0035-252 QSO 00 38 14.73550152 -24 59 02.2352926   18.90   17.14   ~ 108 1
4 NGC 247 LSB 00 47 08.554 -20 45 37.44 10.11 9.61 9.10 8.87   ~ 415 2
5 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3192 2
6 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1270 4
7 QSO B0104-2734 QSO 01 06 26.0819282208 -27 18 11.825299296   18.5 19.0 18.61   ~ 45 0
8 QSO B0116-219 QSO 01 18 57.26217841 -21 41 30.1402631   19.40 19.0 19.37   ~ 111 1
9 QSO B0130-17 QSO 01 32 43.48746292 -16 54 48.5220804   18.75 18.44 15.44   ~ 205 1
10 ICRF J014310.1-320056 BLL 01 43 10.13158674 -32 00 56.6520741   19.89 19.36 18.37   ~ 43 1
11 QSO B0218+357 QSO 02 21 05.4920852208 +35 56 13.848581904   20.0 20.0 19.60   ~ 534 3
12 4C 28.07 QSO 02 37 52.40567519 +28 48 08.9899986     18.5 16.99   ~ 569 1
13 NGC 1052 GiP 02 41 04.79849989 -08 15 20.7519527 11.84 11.41 10.47 10.71   ~ 1253 2
14 M 77 GiP 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4424 2
15 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6555 1
16 QSO B0332-403 BLL 03 34 13.65448823 -40 08 25.3979928 18.54 18.35 17.87 17.5   ~ 305 1
17 IC 342 SBG 03 46 48.514 +68 05 45.98   10.5       ~ 1469 1
18 QSO B0420-0127 QSO 04 23 15.80072217 -01 20 33.0656073   17.50 17.00 16.28   ~ 1147 3
19 LHA 120-N 113 HII 05 13 21.7 -69 21 33           ~ 108 1
20 QSO B0521-365 BLL 05 22 57.98464178 -36 27 30.8512953   15.26 14.62 14.48   ~ 792 2
21 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16507 1
22 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5676 6
23 NGC 3256 IG 10 27 51.284 -43 54 13.55   11.83 11.33 10.62 11.9 ~ 811 2
24 M 66 GiP 11 20 15.026 +12 59 28.64 9.85 9.65 8.92     ~ 1296 4
25 NGC 4355 Sy2 12 26 54.6206739120 -00 52 39.421212996   14.21 13.37     ~ 464 2
26 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1398 2
27 M 51 GiP 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4159 4
28 M 83 SBG 13 37 00.91920 -29 51 56.7400 8.85 8.11 7.52 7.21   ~ 2453 2
29 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2872 4
30 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13430 0
31 NAME Sgr B2 (North) Rad 17 47 20.2 -28 22 21           ~ 624 1
32 QSO B1830-211 Bla 18 33 39.9399138048 -21 03 39.368838780     18.70 21   ~ 628 1
33 ESO 286-19 LIN 20 58 26.8183783008 -42 38 59.411838156   14.79 14.79 14.20   ~ 276 0
34 3C 454.3 Bla 22 53 57.7480438728 +16 08 53.561508864   16.57 16.10 15.22   ~ 2727 2
35 ICRF J225805.9-275821 Sy1 22 58 05.96287687 -27 58 21.2567572   17.34 16.77 17.20   ~ 335 1
36 QSO B2355-534 BLL 23 57 53.26605016 -53 11 13.6895021   18.63 17.8 16.89   ~ 154 1

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2023.01.27-18:00:09

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