NGC 2023

NGC 2023
星雲
發射星雲
	緊挨著馬頭星雲的NGC 2023
觀測資料: J2000 epoch
赤經	05h 41m 37.9s
赤緯	−02° 15′ 52″
距離	1,300 ly（400 pc）光年
視尺度(V)	10'×10'
星座	獵戶座
名稱	NGC 2023, LBN 954, IRAS 05391-0217
	相關條目：星雲列表

NGC 2023是在赤道星座獵戶座中的一個發射和反射星雲。它是由出生於德國的天文學家威廉·赫歇爾在1785年1月6日發現的。這個反射星雲是天空中最大的星雲之一^[4]，大小為10 × 10 弧分^[3]。它位於馬頭星雲東北方6997436332312998583♠~15′，距離太陽 1,300 ly（400 pc）^[2]。

這個恆星形成區的星雲是獵戶座B分子雲的一部分^[2]，或複合體獵戶座分子雲團（Lynds 1630）的北段。就恆星密度而言，它是嵌入該複合體的四個星團中最貧瘠的，只有21個嵌入紅外源^[5]。反射星雲被赫比格Ae/Be星HD 37903（英語：HD 37903）照亮，其光譜類型約為B2Ve^[5]。中心恆星周圍的區域正在近紅外範圍內輻射螢光分子氫發射^[6]^[7]。已經從星雲的塵埃中探測到多環芳香烴的紅外發射^[8]。

圖集

由VLT的FORS拍攝的NGC 2023。
哈伯太空望遠鏡的先進巡天照相機拍攝NGC 2023的南部細節。

參考資料

^ ^1.0 ^1.1 ^1.2 NGC 2023. SIMBAD. 斯特拉斯堡天文資料中心. [2020-08-28].
^ ^2.0 ^2.1 ^2.2 López-García, M. A.; et al. A comprehensive study of NGC 2023 with XMM-Newton and Spitzer. Monthly Notices of the Royal Astronomical Society. February 2013, 429 (1): 775–791. Bibcode:2013MNRAS.429..775L. arXiv:1211.2935 . doi:10.1093/mnras/sts373.
^ ^3.0 ^3.1 ^3.2 ^3.3 Seligman, Courtney. NGC Objects: NGC 2000 - 2049. cseligman.com. [2020-08-28]. （原始內容存檔於2018-10-16）.
^ ESO's Very Large Telescope Snaps Beautiful Image of Reflection Nebula. Sci–News. May 14, 2019 [2020-08-28]. （原始內容存檔於2020-09-23）.
^ ^5.0 ^5.1 Mookerjea, B.; et al. Young stars and protostellar cores near NGC 2023. Astronomy and Astrophysics. December 2009, 507 (3): 1485–1502. Bibcode:2009A&A...507.1485M. S2CID 10603379. arXiv:0909.2614 . doi:10.1051/0004-6361/200912550.
^ Burton, Michael G.; et al. Near-IR Fluorescent Molecular Hydrogen Emission from NGC 2023. Publications of the Astronomical Society of Australia. 1998, 15 (2): 194–201. Bibcode:1998PASA...15..194B. doi:10.1071/AS98194 .
^ Rouan, D.; et al. The power of adaptive optics: a close look at a molecular cloud in NGC 2023. Monthly Notices of the Royal Astronomical Society. January 1997, 284 (2): 395–400. Bibcode:1997MNRAS.284..395R. doi:10.1093/mnras/284.2.395 .
^ Peeters, Els; et al. The PAH Emission Characteristics of the Reflection Nebula NGC 2023. The Astrophysical Journal. February 2017, 836 (2): 40. Bibcode:2017ApJ...836..198P. S2CID 119211134. arXiv:1701.06585 . doi:10.3847/1538-4357/836/2/198. 198.

外部連結

Sunset glow in Orion. Hubble Space Telescope. NASA. 25 July 2011 [2023-03-05]. （原始內容存檔於2018-12-11）.
VizieR – NGC 2023 （頁面存檔備份，存於網際網路檔案館）
NED – NGC 2023
WikiSky上關於NGC 2023的內容：DSS2, SDSS, GALEX, IRAS, 氫α, X射線, 天文照片, 天圖, 文章和圖片

天文學目錄
NGC天體表：	NGC 2021 - NGC 2022 - NGC 2023 - NGC 2024 - NGC 2025

[simbad-1] 1.0 ^1.1 ^1.2 NGC 2023. SIMBAD. 斯特拉斯堡天文資料中心. [2020-08-28].

[López-García2013-2] 2.0 ^2.1 ^2.2 López-García, M. A.; et al. A comprehensive study of NGC 2023 with XMM-Newton and Spitzer. Monthly Notices of the Royal Astronomical Society. February 2013, 429 (1): 775–791. Bibcode:2013MNRAS.429..775L. arXiv:1211.2935 . doi:10.1093/mnras/sts373.

[ngc-3] 3.0 ^3.1 ^3.2 ^3.3 Seligman, Courtney. NGC Objects: NGC 2000 - 2049. cseligman.com. [2020-08-28]. （原始內容存檔於2018-10-16）.

[scinews2019-4] ESO's Very Large Telescope Snaps Beautiful Image of Reflection Nebula. Sci–News. May 14, 2019 [2020-08-28]. （原始內容存檔於2020-09-23）.

[Mookerjea2009-5] 5.0 ^5.1 Mookerjea, B.; et al. Young stars and protostellar cores near NGC 2023. Astronomy and Astrophysics. December 2009, 507 (3): 1485–1502. Bibcode:2009A&A...507.1485M. S2CID 10603379. arXiv:0909.2614 . doi:10.1051/0004-6361/200912550.

[1998Burton-6] Burton, Michael G.; et al. Near-IR Fluorescent Molecular Hydrogen Emission from NGC 2023. Publications of the Astronomical Society of Australia. 1998, 15 (2): 194–201. Bibcode:1998PASA...15..194B. doi:10.1071/AS98194 .

[Rouan1997-7] Rouan, D.; et al. The power of adaptive optics: a close look at a molecular cloud in NGC 2023. Monthly Notices of the Royal Astronomical Society. January 1997, 284 (2): 395–400. Bibcode:1997MNRAS.284..395R. doi:10.1093/mnras/284.2.395 .

[Peeters2017-8] Peeters, Els; et al. The PAH Emission Characteristics of the Reflection Nebula NGC 2023. The Astrophysical Journal. February 2017, 836 (2): 40. Bibcode:2017ApJ...836..198P. S2CID 119211134. arXiv:1701.06585 . doi:10.3847/1538-4357/836/2/198. 198.

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