IRAS 15206+3342

IRAS 15206+3342
IRAS 15206+3342 by SDSS.
Observation data (J2000.0 epoch)
ConstellationBoötes
Right ascension15h 22m 38.0853s[1]
Declination+33° 31′ 36.078″[1]
Redshift0.125295[1]
Heliocentric radial velocity37,563 km/s[1]
Distance1.892 Gly (580 Mpc)[1]
Apparent magnitude (B)16.80[1]
Characteristics
TypeHii; ULIRG; WR?, Sy2[1]
Size~109,300 ly (33.50 kpc) (estimated)[1]
Notable featuresLuminous infrared galaxy
Other designations
AKARI J1522382+333135, LEDA 84586, NVSS J152237+333134, IDEOS 04982784_00, [BKD2008] WR 291[1]

IRAS 15206+3342 is a galaxy merger located in the constellation of Boötes. Its redshift is (z) 0.125 meaning the object is 1.9 billion light-years from Earth.[1] It is classified as an ultraluminous infrared galaxy and also a Seyfert type 2 galaxy, known to have a distorted disk morphology.[2][3]

Description

IRAS 15206+3342 is classified as a warm ultraluminous infrared galaxy. The total infrared luminosity of this galaxy is 12.27 Lʘ and it displays a H II-type optical spectrum.[4][5] It is an end-stage compact merger product, resulting from two low-luminosity disk galaxies colliding with each other.[6][7] It has a single nucleus[8] and a bent tidal tail found to measure approximately 13 kiloparsecs (kpc). The outer part of the tail is found linking with a resolved stellar system, 20 kiloparsecs from it while its inner parts are of low-surface brightness with luminosities of between 21.5 and 22.0 magnitude. The galaxy shows starbursts at a rate of at least 150 Mʘ per year which in turn contributes half of the total bolometric luminosity.[7]

Imaging by Hubble Space Telescope (HST) showed the object also has many chains of blue compact star-forming region knots within its inner regions, shown arranged in an arc-shape.[9][10][7] Four of these knots are found to be extremely luminous while the others are of low luminosities.[11] The stellar populations of the galaxy are mainly very young, ranging from less than 3 to 10 million years old.[9]Most of the radio emission originates within its nucleus in the southern half of the primary star-forming knots according to ground-based imaging.[12]

High resolution ultraviolet and optical spectroscopy via an imaging spectrograph, showed the galaxy has three identified compact luminous knots. Based on observations, the first knot is found to be the brightest, with its ultraviolet spectrum displaying absorption line features while the other two are mainly H II regions.[13]

References

  1. ^ a b c d e f g h i j "Results for IRAS 15206+3342". NASA/IPAC Extragalactic Database. Retrieved 2025-04-26.
  2. ^ Sanders, D. B.; Soifer, B. T.; Elias, J. H.; Neugebauer, G.; Matthews, K. (May 1988). "Warm ultraluminous galaxies in the IRAS survey - The transition from galaxy to quasar?". The Astrophysical Journal. 328: L35. doi:10.1086/185155. ISSN 0004-637X.
  3. ^ Sanders, D. B.; Scoville, N. Z.; Soifer, B. T. (December 1988). "Detection of abundant molecular gas in the UV-excess quasar Markarian 1014". The Astrophysical Journal. 335: L1. doi:10.1086/185326. ISSN 0004-637X.
  4. ^ García-Marín, M.; Colina, L.; Arribas, S. (October 2009). "Integral field optical spectroscopy of a representative sample of ULIRGs. II. Two-dimensional kpc-scale extinction structure". Astronomy and Astrophysics. 505 (3): 1017–1026. arXiv:0907.2218. doi:10.1051/0004-6361/200912537. ISSN 0004-6361.
  5. ^ Veilleux, Sylvain; Sanders, D. B.; Kim, D.‐C. (1997-07-20). "A Near‐Infrared Search for Hidden Broad‐Line Regions in Ultraluminous Infrared Galaxies". The Astrophysical Journal. 484 (1): 92–107. doi:10.1086/304337. ISSN 0004-637X.
  6. ^ Veilleux, S.; Kim, D.-C.; Sanders, D. B. (July 2002). "Optical and Near-Infrared Imaging of the IRAS 1 Jy Sample of Ultraluminous Infrared Galaxies. II. The Analysis". The Astrophysical Journal Supplement Series. 143: 315–276. doi:10.1086/343844/fulltext/.
  7. ^ a b c Arribas, Santiago; Colina, Luis (2002-07-10). "INTEGRAL Field Spectroscopy of IRAS 15206+3342: Gas Inflows and Starbursts in an Advanced Merger". The Astrophysical Journal. 573 (2): 576–583. doi:10.1086/340755. ISSN 0004-637X.
  8. ^ Colina, Luis; Arribas, Santiago; Monreal‐Ibero, A. (2005-03-10). "Kinematics of Low‐z Ultraluminous Infrared Galaxies and Implications for Dynamical Mass Derivations in High‐zStar‐forming Galaxies". The Astrophysical Journal. 621 (2): 725–737. doi:10.1086/427683. hdl:10261/199279. ISSN 0004-637X.
  9. ^ a b Rodríguez Zaurín, J.; Tadhunter, C. N.; González Delgado, R. M. (2009-12-11). "The properties of the stellar populations in ULIRGs – I. Sample, data and spectral synthesis modelling". Monthly Notices of the Royal Astronomical Society. 400 (3): 1139–1180. arXiv:0908.0269. doi:10.1111/j.1365-2966.2009.15444.x. ISSN 0035-8711.
  10. ^ Surace, Jason A.; Sanders, D. B.; Vacca, William D.; Veilleux, Sylvain; Mazzarella, J. M. (January 1998). "HST/WFPC2 Observations of Warm Ultraluminous Infrared Galaxies". The Astrophysical Journal. 492 (1): 116–136. doi:10.1086/305028. ISSN 0004-637X.
  11. ^ Surace, Jason A.; Sanders, D. B. (February 1999). "High-Resolution Tip/Tilt Near-Infrared Imaging of Warm Ultraluminous Infrared Galaxies". The Astrophysical Journal. 512 (1): 162–177. arXiv:astro-ph/9809184. doi:10.1086/306737. ISSN 0004-637X.
  12. ^ Surace, Jason A.; Sanders, D. B. (August 2000). "Imaging of Ultraluminous Infrared Galaxies in the Near-Ultraviolet". The Astronomical Journal. 120 (2): 604–620. doi:10.1086/301491. ISSN 0004-6256.
  13. ^ Farrah, D.; Surace, J. A.; Veilleux, S.; Sanders, D. B.; Vacca, W. D. (2005-06-10). "Space Telescope Imaging Spectrograph Ultraviolet/Optical Spectroscopy of "Warm" Ultraluminous Infrared Galaxies". The Astrophysical Journal. 626 (1): 70–88. doi:10.1086/428660. ISSN 0004-637X.
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