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Sains
Malaysiana 51(7)(2022):
http://doi.org/10.17576/jsm-2022-5107-20
Identifying Merging Galaxies in
MaNGA using H-a and Hi Observations
(Mengenal Pasti Percantuman Galaksi
dalam MaNGA menggunakan H-a dan Pemerhatian Hi)
DANIAL AHMAD ARIFFIN LEE, ZAMRI ZAINAL ABIDIN*,
ABDUL KADIR MD JWEL &
MOHD SHAIFUL RIZAL HASSAN
Radio Cosmology Lab, Block B, Physics Department,
Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Federal
Territory, Malaysia
Diserahkan: 9 Ogos 2021/Diterima: 7 Disember
2021
Abstract
Reliable methods that could
recognise and distinguish galactic mergers are important for better
understanding of galaxy evolution. This paper explores the feasibility of using
observations on Hα and HI as a method to identify mergers. Sixty sample galaxies
were carefully selected from the MaNGA DR15 database and cross-checked with the
MaNGA Deep Learning DR15 Morphology to determine the merger signature. The
chosen galaxies were divided into two groups, where galaxies with P M E RG < 0.5 were selected as non-merging
galaxies and galaxies with P M E RG >
0.8 were selected as mergers. The Hα emission line plot and Hα
velocity maps were obtained from the MaNGA DR15 database while HI data comes
from HI-MaNGA DR1 catalogue for all 60 galaxies. Seventeen of the 30 merging
galaxies have more than Hα blobs (28.3% of the 60 galaxies) compared to 14
of the 30 non-merging galaxies (23.3%). Fourteen of the mergers (23.3% of 60
galaxies) have asymmetric Hα velocity plots compared to 8 of the non-mergers.
Thirteen of the mergers have a well-defined HI peak (21.7%) versus 11 of the
non-merging galaxies (18.3%). These parameters were found to be a feasible new
method in determining merging galaxies in the universe.
Keywords:
Astrophysics; galaxies; merger
Abstrak
Kaedah untuk mengenal pasti percantuman
galaksi adalah penting dalam mendalami pemahaman evolusi galaksi. Ini adalah
kajian untuk merungkai kebolehlaksanaan penggunaan Hα dan HI sebagai
penanda berlakunya percantuman galaksi. Enam puluh galaksi contoh telah dipilih
secara terperinci daripada senarai DR15 MaNGA dan disemak dengan MaNGA Deep Learning DR15 Morphology.
Galaksi yang dipilih dibahagikan kepada 2 kumpulan, iaitu galaksi dengan P M E RG < 0.5 sebagai galaksi tidak bercantum
dan galaksi dengan P M E RG >
0.8 sebagai yang bercantum. Data Hα dan peta kelajuan Hα diperoleh
daripada MaNGA DR15 manakala data HI diperoleh daripada katalog HI-MaNGA DR1
untuk kesemua 60 galaksi. Tujuh belas daripada 30 galaksi bercantum mempunyai
lebih daripada satu tompokan Hα (28.3% daripada 60 galaksi) berbanding 14 daripada
30 galaksi tidak bercantum (23.3%). Empat belas daripada galaksi bercantum (23.3%
of 60 galaksi) mempunyai taburan kelajuan Hα tidak simetrik berbanding 8 galaksi
tidak bercantum. Tiga belas daripada galaksi bercantum mempunyai puncak HI
(21.7%) berbanding 11 galaksi tidak bercantum (18.3%). Hasil kajian mendapati
data Hα dan HI menunjukkan potensi sebagai penanda berlakunya aktiviti percantuman
galaksi.
Kata
kunci: Astrofizik; galaksi; percantuman
RUJUKAN
Aguado,
D.S., Ahumada, R., Almeida, A., Anderson, S.F., Andrews, B.H., Anguiano, B.,
Ortíz, E.A., Aragón-Salamanca, A., Argudo-Fernández, M., Aubert, M. &
Avila-Reese, V., et al. 2019. The fifteenth data release of the Sloan Digital
Sky Surveys: First release of MaNGA-derived quantities, data visualization
tools, and stellar library. The Astrophysical Journal Supplement Series 240(2): 23.
Bellocchi,
E., Arribas, S. & Colina, L. 2012. Studying the kinematic asymmetries of
disks and post-coalescence mergers using a new “kinemetry” criterion. Astronomy
& Astrophysics 542: A54.
Blanton,
M.R., Bershady, M.A., Abolfathi, B., Albareti, F.D., Prieto, C.A., Almeida, A.,
Alonso-García, J., Anders, F., Anderson, S.F., Andrews, B. & Aquino-Ortíz,
E. 2017. Sloan digital sky survey IV: Mapping the Milky Way, nearby galaxies,
and the distant universe. The Astronomical Journal 154(1): 28.
Bundy, K.,
Bershady, M.A., Law, D.R., Yan, R., Drory, N., MacDonald, N., Wake, D.A.,
Cherinka, B., Sánchez-Gallego, J.R., Weijmans, A.M. & Thomas, D. 2014.
Overview of the SDSS-IV MaNGA survey: Mapping nearby galaxies at apache point
observatory. The Astrophysical Journal 798(1): 7.
Chen,
Y.P., Yan, R., Maraston, C., Thomas, D., Stringfellow, G.S., Bizyaev, D.,
Gelfand, J.D., Beers, T.C., Fernández-Trincado, J.G., Lazarz, D. & Hill, L.
2020. Stellar parameters for the first release of the MaSTar library: An
empirical approach. The Astrophysical Journal 899(1): 62.
Cherinka,
B., Andrews, B.H., Sánchez-Gallego, J., Brownstein, J., Argudo-Fernández, M.,
Blanton, M., Bundy, K., Jones, A., Masters, K., Law, D.R. & Rowlands, K. 2019.
Marvin: A tool kit for streamlined access and visualization of the SDSS-IV
MaNGA data set. The Astronomical Journal 158(2): 74.
Cochrane,
R.K., Best, P.N., Sobral, D., Smail, I., Geach, J.E., Stott, J.P. & Wake,
D.A. 2018. The dependence of galaxy clustering on stellar mass, star-formation
rate and redshift at z= 0.8–2.2, with HiZELS. Monthly Notices of the Royal
Astronomical Society 475(3): 3730-3745.
Feng, S.,
Shen, S.Y., Yuan, F.T., Riffel, R.A. & Pan, K. 2020. SDSS-IV MaNGA: Kinematic
asymmetry as an indicator of galaxy interaction in paired galaxies. The
Astrophysical Journal Letters 892(2): L20.
Fischer,
J.L., Domínguez Sánchez, H. & Bernardi, M. 2019. SDSS-IV MaNGA PyMorph photometric
and deep learning morphological catalogues and implications for bulge
properties and stellar angular momentum. Monthly Notices of the Royal
Astronomical Society 483(2): 2057-2077.
Greener,
M.J., Aragón-Salamanca, A., Merrifield, M.R., Peterken, T.G., Fraser-McKelvie,
A., Masters, K.L., Krawczyk, C.M., Boardman, N.F., Boquien, M., Andrews, B.H.
& Brinkmann, J. 2020. SDSS-IV MaNGA: Spatially resolved dust attenuation in
spiral galaxies. Monthly Notices of the Royal Astronomical Society 495(2):
2305-2320.
Hwang,
H.C., Barrera-Ballesteros, J.K., Heckman, T.M., Rowlands, K., Lin, L.,
Rodriguez-Gomez, V., Pan, H.A., Hsieh, B.C., Sánchez, S., Bizyaev, D. &
Almeida, J.S. 2019. Anomalously low-metallicity regions in MaNGA Star-forming galaxies:
Accretion caught in action? The Astrophysical Journal 872(2): 144.
Hoyos, C.,
Aragón-Salamanca, A., Gray, M.E., Maltby, D.T., Bell, E.F., Barazza, F.D.,
Böhm, A., Häußler, B., Jahnke, K., Jogee, S. & Lane, K.P. 2012. A new
automatic method to identify galaxy mergers–I. Description and application to
the Space Telescope A901/902 galaxy evolution survey. Monthly Notices of the
Royal Astronomical Society 419(3): 2703-2724.
Li, S.L.,
Shi, Y., Bizyaev, D., Duckworth, C., Yan, R.B., Chen, Y.M., Bing, L.J., Chen,
J.H., Yu, X.L. & Riffel, R.A. 2021. The impact of merging on the origin of
kinematically misaligned and counter-rotating galaxies in MaNGA. Monthly
Notices of the Royal Astronomical Society 501(1): 14-23.
Lian, J.,
Thomas, D., Li, C., Zheng, Z., Maraston, C., Bizyaev, D., Lane, R.R. & Yan.
R. 2019. SDSS-IV MaNGA: environmental dependence of gas metallicity gradients
in local star-forming galaxies. Monthly Notices of the Royal Astronomical
Society 489(1): 1436-1450.
Masters,
K.L., Stark, D.V., Pace, Z.J., Phipps, F., Rujopakarn, W., Samanso, N.,
Harrington, E., Sánchez-Gallego, J.R., Avila-Reese, V., Bershady, M. &
Cherinka, B. 2019. HI-MaNGA: H I follow-up for the MaNGA survey. Monthly
Notices of the Royal Astronomical Society 488(3): 3396-3405.
Mullan,
B., Konstantopoulos, I.S., Kepley, A.A., Lee, K.H., Charlton, J.C., Knierman,
K., Bastian, N., Chandar, R., Durrell, P.R., Elmegreen, D. & English, J. 2011.
Star clusters in the tidal tails of interacting galaxies: Cluster populations
across a variety of tail environments. The Astrophysical Journal 731(2):
93.
Nevin, R.,
Blecha, L., Comerford, J., Greene, J.E., Law, D.R., Stark, D.V., Westfall,
K.B., Vazquez-Mata, J.A., Smethurst, R., Argudo-Fernández, M. & Brownstein,
J.R. 2021. Accurate identification of galaxy mergers with stellar kinematics. The
Astrophysical Journal 912(1): 45.
Pan, H.A.,
Lin, L., Hsieh, B.C., Barrera-Ballesteros, J.K., Sánchez, S.F., Hsu, C.H.,
Keenan, R., Tissera, P.B., Boquien, M., Dai, Y.S. & Knapen, J.H. 2019.
SDSS-IV MaNGA: Spatial evolution of star formation triggered by galaxy
interactions. The Astrophysical Journal 881(2): 119.
Pearson,
W.J., Wang, L., Alpaslan, M., Baldry, I., Bilicki, M., Brown, M.J.I., Grootes,
M.W., Holwerda, B.W., Kitching, T.D., Kruk, S. & van Der Tak, F.F.S. 2019a.
Effect of galaxy mergers on star-formation rates. Astronomy & Astrophysics 631: A51.
Pearson,
W.J., Wang, L., Trayford, J.W., Petrillo, C.E. & van Der Tak. F.F.S. 2019b.
Identifying galaxy mergers in observations and simulations with deep learning. Astronomy
& Astrophysics 626: A49.
Schaefer,
A.L., Tremonti, C., Pace, Z., Belfiore, F., Argudo-Fernandez, M., Bershady,
M.A., Drory, N., Jones, A., Maiolino, R., Stark, D. & Wake, D. 2019.
SDSS-IV MaNGA: Evidence for enriched accretion onto satellite galaxies in dense
environments. The Astrophysical Journal 884(2): 156.
Stark,
D.V., Masters, K.L., Avila-Reese, V., Riffel, R., Riffel, R., Boardman, N.F.,
Zheng, Z., Weijmans, A.M., Dillon, S., Fielder, C. & Finnegan, D. 2021.
HI-MaNGA: Tracing the physics of the neutral and ionized ISM with the second
data release. Monthly Notices of the Royal Astronomical Society 503(1):
1345-1366.
Steffen, J.L.,
Fu, H., Comerford, J.M., Dai, Y.S., Feng, S., Gross, A.C. & Xue, R. 2021.
SDSS-IV MaNGA: The radial profile of enhanced star formation in close galaxy
Pairs. The Astrophysical Journal 909(2): 120.
Thorp, M.D.,
Ellison, S.L., Simard, L., Sánchez, S.F. & Antonio, B. 2019. Spatially
resolved star formation and metallicity profiles in post-merger galaxies from
MaNGA. Monthly Notices of the Royal Astronomical Society: Letters 482(1):
L55-L59.
Yan, R.,
Bundy, K., Law, D.R., Bershady, M.A., Andrews, B., Cherinka, B.,
Diamond-Stanic, A.M., Drory, N., MacDonald, N., Sánchez-Gallego, J.R. &
Thomas, D. 2016. SDSS-IV MaNGA IFS galaxy survey - Survey design, execution,
and initial data quality. The Astronomical Journal 152(6): 197.
*Pengarang untuk surat-menyurat; email: zzaa@um.edu.my
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