J/ApJS/279/55 MIPAPS. II. Paα emission-line sources (Kim+, 2025)
MIRIS Paα Galactic Plane Survey.
II. The catalog of Paα emission-line sources.
Kim I.-J., Pyo J., Seon K.-I., Jeong W.-S., Nakagawa T., Matsumoto T.
<Astrophys. J. Suppl. Ser., 279, 55 (2025)>
=2025ApJS..279...55K 2025ApJS..279...55K
ADC_Keywords: Galactic plane; H II regions; Photometry, infrared;
Interstellar medium; Surveys
Keywords: Surveys ; Catalogs ; H I line emission ; Near infrared astronomy ;
Galaxy structure ; Interstellar medium ; Interstellar objects ;
H II regions ; Interstellar dust extinction ; Interstellar reddening
Abstract:
Using data from the MIRIS Paα Galactic Plane Survey (MIPAPS), we
present a Paα 1.87µm line image of the entire Galactic plane
within the latitude range of -3°≲b≲+3°, revealing numerous
Paα features. Based on the MIPAPS Paα image and the
Wide-field Infrared Survey Explorer (WISE) HII region catalog, we
compile a catalog of 1489 Paα emission-line sources in the
Galactic plane within 90°≲l≲330°. By comparing our Paα
images with Hα images constructed from the IPHAS and VPHAS+
survey data, we demonstrate the advantages of Paα line
observations. We identify 902 Paα sources associated with HII
regions, and newly confirm 619 HII region candidates as definitive HII
regions through Paα or Hα detections. We also identify
261 extended and 326 pointlike Paα sources not included in the
WISE catalog, most of which have Hα counterparts in the IPHAS or
VPHAS+ images. A search of the SIMBAD database indicates that these
sources originate from diverse object types. By measuring Paα
and Hα fluxes, we estimate the E(B-V) color excesses derived
from extended emissions for 138 Paα sources, showing good
agreement with values obtained from spectrophotometry of ionizing
stars in previous studies. Furthermore, we calculate total Lyman
continuum luminosities for 42 Paα sources, providing constraints
on the distances to HII regions and the spectral types of their
ionizing stars. These results highlight the scientific potential of
Paα line observations and the benefits of combining multiple
hydrogen recombination lines in exploring ionized regions.
Description:
The Multipurpose InfraRed Imaging System (MIRIS) is the primary
scientific payload of the third Korean Science and Technology
Satellite, STSAT-3, which was launched in 2013 November. The pixel
size and field of view are 51.6" and 3.67°x3.67°,
respectively. It has two broadband filters, I (centered at ∼1.05um)
and H (centered at ∼1.6um), and two narrowband filters for the
Paα line (PAAL; centered at ∼1.875um) and the Paα dual
continuum (PAAC; centered at ∼1.84 and ∼1.91um).
The MIRIS Paα Galactic Plane Survey (MIPAPS) include a total of
241 observational fields of the entire Galactic plane, with an average
exposure of ∼20 minutes per filter. The entire data set is available
at the official MIRIS website.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 175 1489 MIPAPS catalog of Paα emission-line sources
table4.dat 35 1764 WISE HII region sources with No MIPAPS Paα
detection
--------------------------------------------------------------------------------
See also:
VII/233 : 2MASS All-Sky Extended Source Catalog (XSC) (IPAC/UMass, 2003-2006)
II/321 : IPHAS DR2 Source Catalogue (Barentsen+, 2014)
II/386 : VPHAS+ DR3 survey (Drew+, 2025)
J/A+A/397/133 : Star-forming complexes in the Galaxy (Russeil+, 2003)
J/A+A/470/161 : UBV phot. of HII regions exciting stars (Russeil+, 2007)
J/A+A/480/409 : IPHAS symbiotic stars candidates (Corradi+, 2008)
J/MNRAS/384/1277 : Hα emission line sources from IPHAS (Witham+, 2008)
J/A+A/504/291 : Candidate Planetary Nebulae in IPHAS cat. (Viironen+, 2009)
J/MNRAS/415/103 : IPHAS T Tauri candidates in IC 1396 (Barentsen+, 2011)
J/ApJS/212/1 : The WISE catalog of Galactic HII regions (Anderson+, 2014)
J/MNRAS/440/2036 : VPHAS+ survey synthetic colours (Drew+, 2014)
J/A+A/569/A125 : Spiral structure of the Milky Way (Hou+, 2014)
J/A+A/567/A49 : Spectra of IPHAS symbiotic stars (Rodriguez-Flores+, 2014)
J/MNRAS/443/3388 : IPHAS extended planetary nebulae release 1 (Sabin+, 2014)
J/AJ/150/147 : Galactic HII regions. I. Stellar distances (Foster+, 2015)
J/MNRAS/453/1026 : Lagoon Nebula M8 T tauri accretion rates (Kalari+, 2015)
J/MNRAS/446/274 : A deep catalogue of classical Be stars (Raddi+, 2015)
J/A+A/591/A140 : IPHAS-selected classical Be stars (Gkouvelis+, 2016)
J/MNRAS/484/5102 : NGC 6383 T Tauri accretion rates (Kalari, 2019)
J/A+A/638/A21 : Herbig Ae/Be and classical Be stars catalog (Vioque+, 2020)
J/A+A/692/A103 : New planetary nebula candidates (Li+, 2024)
http://miris.kasi.re.kr/miris/ : MIRIS homepage
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 A13 --- MIPAPS MIPAPS name (GLLL.ll+BB.bb) (1)
15- 19 I5 arcsec Rad1 [64/12000]? Radius1 of source extent (2)
21- 24 I4 arcsec Rad2 [200/5500]? Radius2 of source extent (2)
26- 28 I3 deg PA [0/165]? Position angle of source extent (2)
30- 35 A6 --- ID Source identifier (3)
37 A1 --- n_ID [p] p: Information for 78 MIPAPS Paα
sources are available in Table 8
39- 53 A15 --- WISE WISE HII region source's name
(GLLL.lll+BB.bbb) from
Anderson+ 2014, J/ApJS/212/1
55- 61 A7 --- HaDet Whether Hα line was detected (4)
63-139 A77 --- SIMBAD SIMBAD matching object (5)
141-147 F7.2 10-14W/m2 PaFlux [0.04/1590]? The Paα flux (6)
149-152 F4.2 10-14W/m2 e_PaFlux [0.01/2.2]? The 1σ uncertainty on
PaFlux
154-160 F7.2 10-14W/m2 HaFlux [0.01/6582]? The Hα flux (6)
162-165 F4.2 10-14W/m2 e_HaFlux [0/4.3]? The 1σ uncertainty on HaFlux
167-170 F4.2 mag E(B-V) [0.37/3.7]? The E(B-V) color excess (7)
172-175 F4.2 mag e_E(B-V) [0/0.3]? The 1σ uncertainty on E (B-V)
--------------------------------------------------------------------------------
Note (1): MIPAPS names are assigned based on the central positions of
individual Paα sources.
Note (2): Radius values represent the approximate angular extents of
the Paα sources. For source with elliptical extents, two
radius values are provided, corresponding to the semi-major and
semi-minor axes of the ellipse, along with the specified
position angle.
Note (3): Sequential numbers are assigned base on Galactic longitude.
WK = Paα sources corresponding to "Known" WISE H II region sources;
WC = Paα sources corresponding to "Candidate" WISE H II region sources;
WG = Paα sources corresponding to "Group" WISE H II region sources;
WQ = Paα sources corresponding to "Radio Quiet" WISE HII region sources;
MPE = extended Paα sources with no counterparts in
the WISE HII region catalog;
MPP = point-like Paα sources with no counterparts in
the WISE HII region catalog.
Note (4): Visually inspected in continuum-subtracted IPHAS or
VPHAS+ Hα line images.
Y = visually detected (1135 occurrences)
Yp = visually detected but partially observed (9 occurrences)
Y(P+D) = point source and extended feature are detected simultaneously
(16 occurrences)
N = not visually detected (312 occurrences)
no data = not observed (17 occurrences)
Note (5): Matching objects found in the SIMBAD database.
Note (6): The Paα and Hα fluxes of extended sources
(WK, WC, WG, WQ, and MPE) were calculated using their radius or
semi-major axis values as aperture photometry radii.
For point-like sources (MPP), the Paα fluxes were
estimated by aperture photometry with the same aperture size
of 6 arcmin. The Hα fluxes may include contributions from
the [NII]6548,6584 lines.
Note (7): The contributions of the [NII]6548,6584 lines were corrected
assuming [NII]/H(alpha=0.25.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- WISE WISE H II region source's name (GLLL.lll+BB.bbb)
from Anderson+ 2014, J/ApJS/212/1
17 A1 --- BSrc Whether overlapped with other bright sources (1)
19- 27 A9 --- Res Whether, and to what extent, overlapped with
stellar residuals (2)
29- 35 A7 --- HaDet Whether Hα line was detected (3)
--------------------------------------------------------------------------------
Note (1): Visually inspected whether the individual source ares overlap with
other bright Paα sources in continuum-subtracted
MIPAPS Paα line images.
Note (2): Visually inspected whether, and to what extent, the individual
source areas overlap with stellar residuals in continuum-subtracted
MIPAPS Paα line images.
N = the entire source area overlaps with no stellar residuals;
partially = source area partially overlaps with stellar residuals;
largely = source area largely overlaps with stellar residuals;
entirely = source area entirely overlaps with stellar residuals.
Note (3): Visually inspected in continuum-subtracted IPHAS or
VPHAS+ Hα line images.
Y = visually detected (195 occurrences)
N = not visually detected;
no data = not observed.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
References:
Kim et al. Paper I. 2018ApJS..238...28K 2018ApJS..238...28K
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 04-Mar-2026