2019ApJ...885L..31H

Query : 2019ApJ...885L..31H

2019ApJ...885L..31H - Astrophys. J., 885, L31-L31 (2019/November-2)

Mapping electron temperature variations across a spiral arm in NGC 1672.

HO I.-T., KRECKEL K., MEIDT S.E., GROVES B., BLANC G.A., BIGIEL F., DALE D.A., EMSELLEM E., GLOVER S.C.O., GRASHA K., KEWLEY L.J., KRUIJSSEN J.M.D., LANG P., McELROY R., KUDRITZKI R.-P., SANCHEZ-BLAZQUEZ P., SANDSTROM K., SANTORO F., SCHINNERER E. and SCHRUBA A.

Abstract (from CDS):

We report one of the first extragalactic observations of electron temperature variations across a spiral arm. Using Multi Unit Spectroscopic Explorer mosaic observations of the nearby galaxy NGC 1672, we measure the [N II]λ5755 auroral line in a sample of 80 H II regions in the eastern spiral arm of NGC 1672. We discover systematic temperature variations as a function of distance perpendicular to the spiral arm. The electron temperature is lowest on the spiral arm itself and highest on the downstream side. Photoionization models of different metallicity, pressure, and age of the ionizing source are explored to understand what properties of the interstellar medium drive the observed temperature variations. An azimuthally varying metallicity appears to be the most likely cause of the temperature variations. The electron temperature measurements solidify recent discoveries of azimuthal variations of oxygen abundance based on strong lines, and rule out the possibility that the abundance variations are artifacts of the strong-line calibrations.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): Interstellar medium - Spiral galaxies - Spiral arms - H II regions - Interstellar abundances - Chemical abundances

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 1672 SyG 04 45 42.552 -59 14 50.68 10.29 10.53 9.68 9.53 10.2 ~ 461 2

Query : 2019ApJ...885L..31H

Basic data :
NGC 1672 -- Seyfert Galaxy
Other object types: otypes_help 		G (2016A&A,AM,...), Rad (GLEAM,PKS,...), AGN ([VV2000c],[VV2003c],...), IR (IRAS,PSCz,...), SyG (2010A&A), EmG (SINGG), AG? (2020MNRAS), IG (VV), gam (INTREF), X (2E), HI (HIPASS)
ICRS coord. (ep=J2000) : 		04 45 42.552 -59 14 50.68 (Infrared) [ ] C 2006AJ....131.1163S
FK4 coord. (ep=B1950 eq=1950) : 		04 44 55.408 -59 20 11.72 [ ]
Gal coord. (ep=J2000) : 		268.784045 -38.989922 [ ]
Radial velocity / Redshift / cz : 		V(km/s) 1335.2 [~] / z(emission) 0.004464 [~] / cz 1338.19 [~]
   (Rad) C 2004MNRAS.350.1195M
Morphological type: 		4.0 D 1989ESOLV.C......0L
Angular size (arcmin): 		6.81505 4.10607 91 (Opt) B 2023ApJS..269....3M
Fluxes (11) :
U 10.29 [0.09] D 2007ApJS..173..185G
B 10.53 [~] C 1989ESOLV.C......0L
V 9.68 [0.08] D 2007ApJS..173..185G
R 9.53 [~] C 1989ESOLV.C......0L
I 10.2 [~] D 2005MNRAS.361...34D
J 7.897 [0.021] C 2006AJ....131.1163S
H 7.341 [0.025] C 2006AJ....131.1163S
K 7.020 [0.030] C 2006AJ....131.1163S
g (AB) 10.6353 [0.0017] B 2023ApJS..269....3M
r (AB) 9.9900 [0.0016] B 2023ApJS..269....3M
z (AB) 9.5304 [0.0025] B 2023ApJS..269....3M
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 4
: 912 		: 7 Display criteria :

Identifiers (33) :
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NGC 1672 HIPASS J0445-59 PMN J0445-5914 [M98c] 044455.0-592018
AM 0444-592 INTREF 205 PSCz Q04449-5920 [VV2000c] J044542.2-591451
APMBGC 118-129-037 IRAS 04449-5920 SGC 044455-5920.3 [VV2003c] J044542.2-591451
6dFGS gJ044542.5-591450 IRAS F04449-5920 SINGG HIPASS J0445-59 [VV2006c] J044542.2-591451
2E 1149 LEDA 15941 SPASS J044547-591430 [VV2010c] J044542.2-591451
2E 0444.9-5920 2MASX J04454255-5914506 SPT-S J044540-5914.7 [VV98c] J044542.2-591451
ESO 118-43 2MASX J04454255-5914507 SUMSS J044542-591448
ESO-LV 118-0430 PKS J0445-5915 VV 826
GLEAM J044542-591442 PKS 0444-593 [DML87] 607

References (461 between 1850 and 2026) (Total 461)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 8    Distance : 2   

   

Observing logs
ISO : 14    IUE : 3    XMM : 1   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : NGC 1672

Link by name to the catalogue in VizieR :

NGC 1672 2E 1149 ESO-LV 118-0430 HIPASS J0445-59 IRAS 04449-5920
IRAS F04449-5920 2MASX J04454255-5914506 2MASX J04454255-5914507 PKS J0445-5915 PKS 0444-593
PMN J0445-5914 SUMSS J044542-591448 [DML87] 607

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