PM2017 wrote:Adi1008 wrote:ashucha wrote:This may be a bit too specific but does anybody know what the apparent and absolute magnitude of DEM L241 (aka NGC 2029) is and where you got this information? Thanks!
This isn't anywhere close to perfect, but perhaps it's a reasonable estimate.
This paper says that the x-ray source has a luminosity . Converting that to absolute magnitude gives about 0.54
The same paper also mentions that the distance is about 50 kpc. Using the distance modulus, this gives an apparent magnitude of about 19.03
As for the entire remnant, Table 5 in the paper says that it has a luminosity of about . This would give an absolute magnitude of about -1.11 and apparent magnitude 17.385
Correct me if I'm wrong, but simbad seems to give an apparent magnitude of 12.29.
this would imply an absolute magnitude of -6.20, using the distance modulus (with d= 50,000 pc, from the aforementioned paper)
I would tend to believe PM2017 because later in the paper it says, "The bright optical counterpart, a V = 13.5 O5III(f) star, is
easily visible within the Head of the remnant." The star probably emits a lot of ionizing radiation and lights up, so-to-speak, the rest of the nebula. Note that SIMBAD lists the magnitude in the J band, which is infrared, so that makes sense.