Journal article
Hubble Space Telescope Proper Motion Measurements of Supernova Remnant N132D: Center of Expansion and Age
The Astrophysical journal, v 948(1), p33
01 May 2023
Abstract
We present proper motion measurements of the oxygen-rich ejecta of the LMC supernova remnant N132D using two epochs of Hubble Space Telescope Advanced Camera for Surveys data spanning 16 years. The proper motions of 120 individual knots of oxygen-rich gas were measured and used to calculate a center of expansion (CoE) of alpha = 5(h)25(m)01.(s)71 and delta = -69 degrees 38 ' 41.'' 64 (J2000) with a 1 sigma uncertainty of 2.'' 90. This new CoE measurement is 9.'' 2 and 10.'' 8 from two previous CoE estimates based on the geometry of the optically emitting ejecta. We also derive an explosion age of 2770 +/- 500 yr, which is consistent with recent age estimates of approximate to 2500 yr made from 3D ejecta reconstructions. We verified our estimates of the CoE and age using a new automated procedure that detected and tracked the proper motions of 137 knots, with 73 knots that overlap with the visually identified knots. We find that the proper motions of the ejecta are still ballistic, despite the remnant's age, and are consistent with the notion that the ejecta are expanding into an interstellar medium cavity. Evidence for explosion asymmetry from the parent supernova is also observed. Using the visually measured proper motion measurements and corresponding CoE and age, we compare N132D to other supernova remnants with proper motion ejecta studies.
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Details
- Title
- Hubble Space Telescope Proper Motion Measurements of Supernova Remnant N132D: Center of Expansion and Age
- Creators
- John Banovetz - Purdue University West LafayetteDan Milisavljevic - Purdue University West LafayetteNiharika Sravan - California Institute of TechnologyKathryn E. E. Weil - Purdue University West LafayetteBhagya Subrayan - Purdue University West LafayetteRobert A. A. Fesen - Dartmouth CollegeDaniel J. J. Patnaude - Harvard & Smithsonian, Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USAPaul P. P. Plucinsky - Center for Astrophysics Harvard & SmithsonianCharles J. J. Law - Center for Astrophysics Harvard & SmithsonianWilliam P. P. Blair - Johns Hopkins UniversityJon A. A. Morse - California Institute of Technology
- Publication Details
- The Astrophysical journal, v 948(1), p33
- Publisher
- IOP Publishing Ltd
- Number of pages
- 19
- Grant note
- PHY-1914448; PHY- 2209451; AST-2037297; AST-2206532 / NSF; National Science Foundation (NSF) 6052; 12001; 12858; 13378 / HST programs NAS 5-26555 / NASA; National Aeronautics & Space Administration (NASA) DGE1745303 / National Science Foundation Graduate Research Fellowship; National Science Foundation (NSF) 13378 / NASA through Space Telescope Science Institute; Space Telescope Science Institute
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000980747300001
- Scopus ID
- 2-s2.0-85157995293
- Other Identifier
- 991021877482404721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Astronomy & Astrophysics