Mz 1 - Misplaced Pages

Planetary nebula in the constellation Norma

Menzel 1
Emission nebula
Planetary nebula

Observation data: J2000 epoch
Right ascension	15 34 17.002
Declination	−59° 09′ 09.05″
Distance	3,400 ± 500 ly (1,050 ± 150 pc) ly
Apparent magnitude (V)	12.0
Apparent dimensions (V)	76″ × 23″
Constellation	Norma
Physical characteristics
Radius	0.63 ± 0.09 ly ly
Absolute magnitude (V)	1.9 ± 0.3

Designations	ESO 135-11
See also: Lists of nebulae

Mz 1 (Menzel 1), is a bipolar planetary nebula (PN) in the constellation Norma.

Characteristics

Menzel 1 is a bright planetary nebula that has a prominent central ring of enhanced emission. One model of its structure is a three-dimensional hour-glass shape with a smoothly decreasing density starting from the waist or equator as measured outwardly to the poles. It is radially expanding at a rate of about 23 km/s and estimated to be around 4,500 to 10,000 years old and has its polar axis oriented at an angle of around 40° from the plane of the sky. Its central star is estimated to have a mass of 0.63 ± 0.05 M_☉. In 1992 Schwarz, Corradi, & Melnick published narrow band images of Mz 1 in Hα and . H₂ emission was observed in Mz 1 by Webster, Payne, Storey, Dopita (1988). However, despite its relative brightness, Mz 1 has only been studied in a few papers (Monteiro et al. 2005).

History

Mz 1 was discovered by Donald Howard Menzel in 1922. (Menzel 1922)

Notes

3,400 ± 500 ly distance × sin( 76″ diameter_angle / 2 ) = 0.63 ± 0.09 ly. radius
12.0 apparent magnitude - 5 * (log₁₀(1,050 ± 150 pc distance) - 1) = 1.9 ± 0.3 absolute magnitude

^ SIMBAD 2007
^ Monteiro et al. 2005
^ Gottlieb & Wallace 2005
Schwarz, H. E.; Corradi, R. L. M.; Melnick, J. (November 1992). "A catalogue of narrow band images of planetary nebulae". Astronomy and Astrophysics Supplement Series. 93 (1): 23–113. Bibcode:1992A&AS...96...23S.

References

Gottlieb, Steve; Wallace, Kent (July 15, 2005), "Results for Mz 1", Doug Snyder's Planetary Nebulae Web Site, Doug Snyder, archived from the original on February 6, 2012 (archive)
Menzel, D. N. (1922), "Five new planetary nebulae", Harvard Bulletin, 177: 0, Bibcode:1922BHarO.777....0M
Monteiro, Hektor; Schwarz, Hugo E.; Gruenwald, Ruth; Guenthner, Katherine; Heathcote, Steve R. (2005), "Three-Dimensional Photoionization Structure and Distances of Planetary Nebulae. II. Menzel 1", Astrophysical Journal, 620 (1): 321–329, arXiv:astro-ph/0410496, Bibcode:2005ApJ...620..321M, doi:10.1086/426809, S2CID 119442827
SIMBAD (January 11, 2007), Results for PN Mz 1, SIMBAD, Centre de Données Astronomiques de Strasbourg

External links

http://www.astro.washington.edu/users/balick/PNIC/PNimages_by_galcoord/322.4-02.6.Mz1.jpg

Constellation of Norma

List of stars in Norma

Stars

Bayer	γ γ δ ε ζ η θ ι ι κ λ μ
Variable	R S T RT RZ IM QU QV QX V378
HD	142415 143183 143361 148156 148937 330075
Other	1E 161348-5055 2M1540 2XMM J160050.7–514245 (Apep) SCR J1546−5534 SGR J1550−5418 XTE J1550–564

Exoplanets	HD 142415 b HD 143361 b HD 148156 b HD 330075 b

Star clusters	NGC 5925 NGC 5999 NGC 6005 NGC 6031 NGC 6067 NGC 6087 NGC 6115 NGC 6134 NGC 6152 NGC 6167 NGC 6169

Nebulae	Mz 1 Mz 3 RCW 103 SDC 335.579-0.292 Shapley 1

Galaxy clusters	Norma Cluster