Spatially Resolved Recent Star Formation History in NGC 6946

被引：1
|
作者：
Tran, Debby [1 ]
Williams, Benjamin [1 ]
Levesque, Emily [1 ]
Lazzarini, Margaret [2 ]
Dalcanton, Julianne [3 ]
Dolphin, Andrew [4 ,5 ]
Koplitz, Brad [6 ]
Smercina, Adam [1 ]
Telford, O. Grace [7 ]
机构：
[1] Univ Washington, Dept Astron, Box 351580, Seattle, WA 98195 USA
[2] CALTECH, Div Phys Math & Astron, 1200 East Calif Blvd, Pasadena, CA 91125 USA
[3] Flatiron Inst, Ctr Computat Astrophys, 162 Fifth Ave, New York, NY 10010 USA
[4] Raytheon Technol, 1151 East Hermans Rd, Tucson, AZ 85756 USA
[5] Univ Arizona, Steward Observ, 933 North Cherry Ave, Tucson, AZ 85721 USA
[6] Arizona State Univ, Sch Earth & Space Explorat, 781 Terrace Mall, Tempe, AZ 85287 USA
[7] Rutgers State Univ, Dept Phys & Astron, 136 Frelinghuysen Rd, Piscataway, NJ 08854 USA
来源：
ASTROPHYSICAL JOURNAL | 2023年 / 954卷 / 02期
关键词：
FORMATION RATE DIAGNOSTICS; SUPERNOVA PROGENITORS; NEARBY GALAXIES; MILKY-WAY; EVOLUTION; MASS; ASTROPY; MODELS; M31; UNCERTAINTIES;
D O I：
10.3847/1538-4357/aced44
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The nearby face-on star-forming spiral galaxy NGC 6946 is known as the Fireworks Galaxy due to its hosting an unusually large number of supernovae. We analyze its resolved near-ultraviolet stellar photometry measured from images taken with the Hubble Space Telescope's Wide Field Camera 3 with the F275W and F336W filters. We model the color-magnitude diagrams of the UV photometry to derive the spatially resolved star formation history of NGC 6946 over the last 25 Myr. From this analysis, we produce maps of the spatial distribution of the young stellar population and measure the total recent star formation rate (SFR) of nearly the entire young stellar disk. We find the global SFR(age & LE;25 Myr) = 13.17-0.79+0.91M & ODOT;yr-1 . Over this period, the SFR is initially very high ( 23.39-2.11+2.43M & ODOT;yr-1 16-25 Myr ago), then monotonically decreases to 5.31-0.17+0.19M & ODOT;yr-1 in the last 10 Myr. This decrease in global SFR over the last 25 Myr is consistent with measurements made with other SFR indicators. We discuss in detail two of the most active regions of the galaxy, which we find are responsible for 3% and 5% of the total star formation over the past 6.3 Myr.
引用
收藏
页数：14
相关论文
共 50 条
  • [1] The recent star formation history of NGC 628 on resolved scales
    Lomaeva, Maria
    De Looze, Ilse
    Saintonge, Amelie
    Decleir, Marjorie
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2022, 517 (03) : 3763 - 3777
  • [2] The spatially resolved star formation history of the dwarf spiral galaxy NGC 5474
    Bortolini, G.
    Cignoni, M.
    Sacchi, E.
    Tosi, M.
    Annibali, F.
    Pascale, R.
    Bellazzini, M.
    Calzetti, D.
    Adamo, A.
    Dale, Daniel A.
    Fumagalli, M.
    Gallagher, John S.
    Grasha, K.
    Johnson, Kelsey E.
    Linden, Sean T.
    Messa, M.
    Oestlin, G.
    Sabbi, E.
    Wofford, A.
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2024, 527 (03) : 5339 - 5355
  • [3] MASSIVE STAR FORMATION IN NGC-6946
    DEGIOIAEASTWOOD, K
    GRASDALEN, GL
    STROM, SE
    STROM, KM
    ASTROPHYSICAL JOURNAL, 1984, 278 (02): : 564 - 574
  • [4] THE RECENT STAR FORMATION HISTORY OF NGC 5102
    Beaulieu, Sylvie F.
    Freeman, Kenneth C.
    Hidalgo, Sebastian L.
    Norman, Colin A.
    Quinn, Peter J.
    ASTRONOMICAL JOURNAL, 2010, 139 (03): : 984 - 993
  • [5] The spatially resolved star formation history of mergers A comparative study of the LIRGs IC 1623, NGC 6090, NGC 2623, and Mice
    Cortijo-Ferrero, C.
    Gonzalez Delgado, R. M.
    Perez, E.
    Cid Fernandes, R.
    Garcia-Benito, R.
    Di Matteo, P.
    Sanchez, S. F.
    de Amorim, A. L.
    Lacerda, E. A. D.
    Lopez Fernandez, R.
    Tadhunter, C.
    ASTRONOMY & ASTROPHYSICS, 2017, 607
  • [6] STAR FORMATION RATES IN RESOLVED GALAXIES: CALIBRATIONS WITH NEAR- AND FAR-INFRARED DATA FOR NGC 5055 AND NGC 6946
    Li, Yiming
    Crocker, Alison F.
    Calzetti, Daniela
    Wilson, Christine D.
    Kennicutt, Robert C.
    Murphy, Eric J.
    Brandl, Bernhard R.
    Draine, B. T.
    Galametz, M.
    Johnson, B. D.
    Armus, L.
    Gordon, K. D.
    Croxall, K.
    Dale, D. A.
    Engelbracht, C. W.
    Groves, B.
    Hao, C. -N.
    Helou, G.
    Hinz, J.
    Hunt, L. K.
    Krause, O.
    Roussel, H.
    Sauvage, M.
    Smith, J. D. T.
    ASTROPHYSICAL JOURNAL, 2013, 768 (02):
  • [7] Star Formation Histories of the LEGUS Dwarf Galaxies. II. Spatially Resolved Star Formation History of the Magellanic Irregular NGC 4449
    Sacchi, E.
    Cignoni, M.
    Aloisi, A.
    Tosi, M.
    Calzetti, D.
    Lee, J. C.
    Adamo, A.
    Annibali, F.
    Dale, D. A.
    Elmegreen, B. G.
    Gouliermis, D. A.
    Grasha, K.
    Grebel, E. K.
    Hunter, D. A.
    Sabbi, E.
    Smith, L. J.
    Thilker, D. A.
    Ubeda, L.
    Whitmore, B. C.
    ASTROPHYSICAL JOURNAL, 2018, 857 (01):
  • [8] THE MOLECULAR BAR AND STAR FORMATION IN THE NUCLEUS OF NGC-6946
    BALL, R
    SARGENT, AI
    SCOVILLE, NZ
    LO, KY
    SCOTT, SL
    ASTROPHYSICAL JOURNAL, 1985, 298 (01): : L21 - &
  • [9] THE SPATIALLY RESOLVED STAR FORMATION HISTORY OF GALAXIES IN THE CALIFA SURVEY
    Gonzalez Delgado, R. M.
    Cid Fernandes, R.
    Garcia-Benito, R.
    Perez, E.
    de Amorim, A. L.
    Cortijo Ferrero, C.
    Lopez Fernandez, R.
    Lacerda, E.
    Vale Asari, N.
    Sanchez, S. F.
    XIV LATIN AMERICAN REGIONAL IAU MEETING, 2014, 44 : 79 - 79
  • [10] Star formation in NGC 5194 (M51a). II. The spatially resolved star formation law
    Kennicutt, Robert C., Jr.
    Calzetti, Daniela
    Walter, Fabian
    Helou, George
    Hollenbach, David J.
    Armus, Lee
    Bendo, George
    Dale, Daniel A.
    Draine, Bruce T.
    Engelbracht, Charles W.
    Gordon, Karl D.
    Prescott, Moire K. M.
    Regan, Michael W.
    Thornley, Michele D.
    Bot, Caroline
    Brinks, Elias
    De Blok, Erwin
    De Mello, Dulia
    Meyer, Martin
    Moustakas, John
    Murphy, Eric J.
    Sheth, Kartik
    Smith, J. D. T.
    ASTROPHYSICAL JOURNAL, 2007, 671 (01): : 333 - 348
12345