| 词条 | NGC 3506 |
| 释义 |
| name = NGC 3506 | image = NGC 3506 hst 10877 R814GB555.png | image_size = 250px | caption = NGC 3506 by Hubble Space Telescope | credit = NASA/STScI/WikiSky | epoch = J2000 | type = Sc [1] | ra = {{RA|11|03|13.0}}[1] | dec = {{DEC|11|04|36}}[1] | dist_ly = 297 Mly (86 Mpc)[1] | z = 6408 ± 3 km/s[1] | appmag_v = 12.6 | size_v = 1′.2 × 1′.1[1] | constellation name = Leo | notes = | names = UGC 6120, MCG +02-28-047, PGC 33379[1] }}NGC 3506 is a spiral galaxy in constellation Leo. It is located at a distance of circa 300 million light years from Earth, which, given its apparent dimensions, means that NGC 3506 is about 115,000 light years across. The galaxy has two main spiral arms, with high surface brightness, which can be traced for half a revolution before they fade. One arm splits into four spiral arcs.[2] Two supernovae have been observed in NGC 3506, SN 2003L (type Ic) and 2017dfq (type Ia, mag. 15.3[3]). SN 2003L spectrum featured a relatively blue continuum, dominated by strong P-Cyg lines of Ca II (H and K) and Fe II and a relatively weaker Si II 635.5-nm line was also visible.[4] It is an isolated galaxy.[5] References1. ^1 2 3 4 5 6 {{cite web | title=NASA/IPAC Extragalactic Database | work=Results for NGC 3506 | url=http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+3506 | accessdate=2016-01-18 }} 2. ^{{cite book|last1=Sandage|first1=A.|last2=Bedke|first2=J.|title=The Carnegie Atlas of Galaxies. Volume I|date=1994|publisher=Carnegie Institution of Washington}} 3. ^Latest Supernovae rochesterastronomy.org 4. ^IAUC 8057: 2003P; 2003L, 2003M,, 2003O International Astronomical Union Circular January 25, 2003 5. ^{{cite journal|last1=Hern?ndez-Toledo|first1=H. M.|last2=V?zquez-Mata|first2=J. A.|last3=Mart?nez-V?zquez|first3=L. A.|last4=Choi|first4=Yun-Young|last5=Park|first5=Changbom|title=The UNAM-KIAS Catalog of Isolated Galaxies|journal=The Astronomical Journal|date=1 June 2010|volume=139|issue=6|pages=2525–2541|doi=10.1088/0004-6256/139/6/2525|url=http://iopscience.iop.org/1538-3881/139/6/2525/suppdata/aj291118t1_mrt.txt|accessdate=29 June 2017|arxiv = 1005.1571 |bibcode = 2010AJ....139.2525H }} External links{{wikiSky}}{{Ngc40}} 5 : Spiral galaxies|Leo (constellation)|NGC objects|UGC objects|Principal Galaxies Catalogue objects |
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