Date: 4/09/2013 13:36:47
From: mollwollfumble
ID: 385530
Subject: Temperature & luminosity of extreme cosmic objects?

Put approximate effective temperatures and/or luminosities on any of the following objects, please:

Pulsar
Magnetar
Stellar mass black hole (eg. Cygnus X-1)
Nova
Supernova imposter (eg. Eta Carinae in 1841, like a faint supernova)
Supernova
Hypernova
Gamma ray burster
Active galactic nucleus
Quasar
Blazar (ie. BL Lacertae object)

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Date: 4/09/2013 13:59:32
From: Carmen_Sandiego
ID: 385536
Subject: re: Temperature & luminosity of extreme cosmic objects?

We don’t do homework here.

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Date: 4/09/2013 22:59:29
From: Kingy
ID: 385948
Subject: re: Temperature & luminosity of extreme cosmic objects?

mollwollfumble said:


Put approximate effective temperatures and/or luminosities on any of the following objects, please:

Pulsar: 30
Magnetar: 1
Stellar mass black hole (eg. Cygnus X-1): 4
Nova: 1
Supernova imposter (eg. Eta Carinae in 1841, like a faint supernova): 5
Supernova: 9
Hypernova: 2
Gamma ray burster: 6
Active galactic nucleus: 5
Quasar: 3
Blazar (ie. BL Lacertae object): 6(approx)

I rounded up.

Reply Quote
Date: 5/09/2013 00:49:14
From: mollwollfumble
ID: 385965
Subject: re: Temperature & luminosity of extreme cosmic objects?

> We don’t do homework here.

Ain’t homework. Have already winkled out the closest examples of all of these objects. Am interested in where such cosmic objects would lie on a Hertzsprung–Russell diagram. Particularly pulsars, magnetars and stellar mass black holes which may either be much fainter than the Sun or much brighter than the Sun.

It’s easier to find luminosity than effective temperature. Any info on temperatures would be welcome.

> Pulsar 30 …

I had tried to put them roughly in ascending order. On a log10 luminosity scale with 0 = log10(1) for the Sun I get approximately:

Pulsar: 1 to 5
Magnetar: <-1 to 2
Stellar mass black hole (eg. Cygnus X-1): 4
Nova: 6
Supernova imposter (eg. Eta Carinae in 1841, like a faint supernova): 6.7
Supernova: 8
Hypernova: 10
Gamma ray burster: 12
Active galactic nucleus: 9 to 11
Quasar: 13
Blazar (ie. BL Lacertae object): 15

Reply Quote
Date: 5/09/2013 01:44:46
From: Kingy
ID: 385970
Subject: re: Temperature & luminosity of extreme cosmic objects?

mollwollfumble said:

> Pulsar 30 …

I had tried to put them roughly in ascending order. On a log10 luminosity scale with 0 = log10(1) for the Sun I get approximately:

Sorry, I was eating pi.

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