CORRECTIONS TO EARLIER PRINTINGS

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Corrections for

An Introduction to Modern Astrophysics (ISBN 0-201-54730-9)

and

An Introduction to Modern Stellar Astrophysics (ISBN 0-201-59880-9)

• [CHAPTER 1, p. 8] Figure 1.5: the point labeled "Inferior conjunction" should be "Superior conjunction." The point of inferior conjunction is on the same orbit, between Earth and the Sun.
• [CHAPTER 1, p. 14] Figure 1.12(b): 76.5^o should be replaced by 73.5^o and 1.03 m should be replaced by 1.04 m. The caption should also indicate that the data are for an observer located at 40^o N latitude.
• [CHAPTER 1, p. 16] The second line from the top should read, "Approximate expressions for the changes in the coordinates are given by ...."
• [CHAPTER 1, p. 16] The precessed right ascension of Altair should be 19 hours, 50.2 arcmin rather than arcsec.
• [CHAPTER 2, p. 25] The second line from the bottom should read, "joined him later in Prague" rather than "at Uraniborg."
• [CHAPTER 2, p. 42] The first equation should be $W \equiv -\Delta U$ rather than $W \equiv -\nabla U$.
• [CHAPTER 2, p. 49] Figure 2.13: the angle $\theta$ should be $d\theta$.
• [CHAPTER 3, p. 75] Section 3.4, lines 5 -- 6: a line break should not have occurred between "10,100" and "K" (the temperature unit).
• [CHAPTER 3, p. 76] Figure 3.8: omit the exponent "-1" on the unit "erg" on the vertical axis.
• [CHAPTER 4, p. 109] Immediately above Eq. (4.37), the expression the wavelength should read $\lambda = \nu/c$.
• [CHAPTER 6, p. 178] Last paragraph, line 2: "Caucus Mountains" should be spelled "Caucasus Mountains".
• [CHAPTER 6, p. 179] On line 18, "adaptive optics" should be replaced by "active optics." Two lines lower should read, "... different positions. (Another technique, adaptive optics, analyzes the displacement ...." The sentence after that should begin "The NTT observatory also uses ...."
• [CHAPTER 6, p. 184] Two lines above Eq. (6.11), the equation should read "[$L = (n - \frac{1}{2})\lambda$, where $n = 1, 2, \ldots$ for destructive interference]."
• [CHAPTER 6, p. 187] Paragraph 1, line 4: "Puerto Rico" should be replaced by "St. Croix in the U S Virgin Islands."
• [CHAPTER 7, p. 203] Figure 7.2 caption: the second sentence should read "The data from many orbital periods ..." (omit the word "of").
• [CHAPTER 7, p. 209] Paragraph 3, line 4 should read, "... over time scales that are short...."
• [CHAPTER 7, p. 217] Figure 7.11 caption, line 7: "Aston." should be replaced by "Astron.."
• [CHAPTER 7, p. 220 -- 221] Omit part (a) of Problem 7.7.
• [CHAPTER 8, p. 224] The fourth line should read, "HD numbers; Betelgeuse is HD 39801" (not "HD 1").
• [CHAPTER 8, p. 252] The end of the sixth line of Problem 8.10 should refer to "singly ionized helium" rather than "singly ionized hydrogen."
• [CHAPTER 8, p. 254] Problem 8.16: "Formalhaut" should be spelled "Fomalhaut".  (There are two instances of incorrect spellings.)
• [CHAPTER 9, p. 289] The italicized phrase starting seven lines from the bottom should read, "when looking at a star, we see down to an average vertical optical depth of $\tau_v \approx 2/3$, averaged over the disk of the star."
• [CHAPTER 9, p. 294] (a)  The equation at the beginning of the page should read $(F_c - F_\lambda)/(F_c - F_\lambda_\circ) = 1/2$
                                        (b)   The first line of the second paragraph should read, "Three main processes are responsible ... ."
• [CHAPTER 9, p. 296] In the first line of Example 9.8, a line break should not have occurred between "5770" and "K" (the temperature unit).
• [CHAPTER 9, p. 309] Problem 9.16(a) should read, "Show that in a spherical coordinate system, with the center of the star at the origin, the transfer equation has the form
  \begin{displaymath}
  -\frac{\cos \theta '} {\kappa_{\lambda}\rho}
  \frac{dI_{\lambda}}{d\tau}=I_{\lambda}-S_{\lambda},
  \end{displaymath}
  where $\theta '$ is the angle between the ray and the outward radial direction. Note that you cannot simply replace s with r!"
• [CHAPTER 9, p. 310] At the ends of Problems 9.21 and 9.22, add the sentence, "You may also assume thermodynamic equilibrium when $\tau_{\lambda ,\circ} \gg 1$."
• [CHAPTER 9, p. 310] Problem 9.24(a): omit the $\lambda$ subscript in the first equation.
• [CHAPTER 9, p. 312] Problem 9.25: line 3 should read, "... of the line (let $F_{\lambda} =0$), and the minor ...."
• [CHAPTER 10, p. 359] In the third line below Eq. (10.84), "10.84" should be in parentheses.
• [CHAPTER 10, p. 379] Line 1 should read: "What are the values ...."
• [CHAPTER 10, p. 379] Problem 10.19(d): subpart (vi) should read, "The radius of the star."
• [CHAPTER 10, p. 379] Problem 10.20(a) should read "... which model (Z = 0.008 or Z = 0.010) has ...."
• [CHAPTER 11, p. 392] Figure 11.12: replace the third sentence in the caption with "The predicted solar neutrino capture rate for the $^{37}_{17}$Cl detector is 7.9 SNU."
• [CHAPTER 12, p. 442] First line: the wavelength should be 2175 angstroms, not 1275 angstroms.
• [CHAPTER 12, p. 445] End of the second line following Eq. (12.4): "..., and $\Delta v$ is the full width of the line at half maximum (in km s^-1)."
• [CHAPTER 12, p. 461] Table 12.1: The exponents are incorrect for points 7 and 8 of the 15 solar mass model. Point 7 should read "4.585(4)" and point 8 should read "6.170(4)".
• [CHAPTER 13, p. 537] The equation in part (a) of Problem 13.5 should read $\dot{M} = -4 \times 10^{-13}\eta \frac{LR}{M} {\rm M}_\odot {\rm yr}^{-1}$.
• [CHAPTER 13, p. 539] Problem 13.17(a) should read "... within a multiplicative constant, ...."
• [CHAPTER 14, p. 572] Problem 14.3: insert after the fourth sentence, "The mean visual extinction is $a_V = 0.15 \pm 0.17$ magnitudes for the M100 Cepheids."
• [CHAPTER 15, p. 584 -- 585]  In the second paragraph of p. 584, the third line should read "... by the Pauli Exclusion Principle..."  (the last line of the page moved to page 585).
• [CHAPTER 15, p. 599]  The third sentence of the last paragraph should read "However, as mentioned in the discussion of the Chandrasekhar limit (Section 15.4), when ...."
• [CHAPTER 16, p. 667] The first sentence of footnote 22 should read "...is only valid outside matter."
• [CHAPTER 17, p. 746 -- 747] Problem 17.7: add at the end, "Neglect the small amount of light contributed by the primary and secondary stars."
• [APPENDIX I, p. A-53] Line 10 should read, "Enter the mass fraction of metals (Z):", rather than "...(Y):".

Corrections only applicable to:

An Introduction to Modern Astrophysics (ISBN 0-201-54730-9)

• [PREFACE, p. iv] Line 17: the word "loose" should be replaced by the word "lose."
• [PREFACE, p. v] The web address eight lines from the bottom should be updated to read "http://astrophysics.weber.edu".
• [PREFACE, p. vi] Line 24: the word "to" is missing in the phrase "advice on how to improve."
• [CHAPTER 19, p. 801] Figure 19.16 has two misspelled words:  "lithoshere" should be "lithosphere" and "asthenoshere" should be "asthenosphere."
• [CHAPTER 19, p. 805] Figure 19.18 caption: add "(Data from D. A. Papanastassiou and G. J. Wasserburg, Proc Seventh Lunar Sci Conf., Pergamon Press, New York, 1976.)"
• [CHAPTER 20, p. 832] "plum" and "plums" should be replaced by "plume" and "plumes," respectively in the third paragraph in lines 6 and 9.
• [CHAPTER 20, p. 833] "plum" should be replaced by "plume" in line 4 of the caption to Figure 20.6.
• [CHAPTER 20, p. 845] "plums" should be replaced three times by "plumes" in paragraph 2.
• [CHAPTER 20, p. 857] Problem 20.6: omit part (b).
• [CHAPTER 22, p. 934] Figure 22.15 caption: add to the acknowledgement, "Reprinted with permission,
  © 1993, Macmillan Magazines Limited."
• [CHAPTER 23, p. 989] Van Maanen's name was misspelled twice, both occurrences are on the sixth line of the second full paragraph.
• [CHAPTER 23, p. 991] Figure 23.2:  The location of observer B in the left-most sketch should be located above the oblate spheroid, looking down along the c axis.  Correspondingly, the right-most sketch should be larger in comparison.
• [CHAPTER 24, pp 1068 -- 1069] The captions for Figures 24.13 and 24.14 should acknowledge J. Barnes.
• [CHAPTER 24, pp 1084 -- 1085] The third equation on p. 1084 should be M_{\rm in} = 2\int_0^h \rho_0 e^{-z/h} A \,dz=1.26\rho_0Ah. Note that this changes the numerical factor from 2.35 to 1.26. The correction leads to different numerical factors for several of the equations that follow: for g(h), the factor should be 2.53 (rather than 4.7); for U(h) the factor should be 1.26 (rather than 2.35); for h(T) (Eq. 24.9) the factor in the denominator should be 2.53 (rather than 4.7); and in Example 24.4, h(10⁶ K) = 2.2 kpc (rather than 1.6 kpc).
• [CHAPTER 24, p. 1093] Problem 24.7: the first sentence of part (b) should read "The combined visual luminosity of the central galaxies M105 and NGC 3384 is L_V = 2.37 x 10¹⁰ L_${\odot}$ (from Schneider, Ap. J., 343, 94, 1989)."
• [CHAPTER 25, p. 1112] Figure 25.6 caption: add after the first sentence, "The two lines use different corrections for the Sun's motion."
• [CHAPTER 25, p. 1131] In the fifth and sixth lines from the bottom, switch "northern" and "southern."
• [CHAPTER 25, p. 1151] Problem 25.6 should begin, "Use the solid line in Hubble's ...."
• [CHAPTER 25, p. 1153] The second paragraphs of Problem 25.17 should be a separate problem, 25.18. The numbers of the remaining three problems, 25.18 -- 25.20, should be increased by one to become 25.19 -- 25.21, respectively.
• [CHAPTER 26, p. 1163] Figure 26.7 caption, line 2: the unit "Mpc" should be replaced by "kpc."

Corrections only applicable to:

An Introduction to Modern Stellar Astrophysics (ISBN 0-201-54730-9)

• [PREFACE, p. vi] Line 17: the word "loose" should be replaced by the word "lose."
• [PREFACE, p. vii] The web address eleven lines from the bottom of the page should be updated to read "http://astrophysics.weber.edu".
• [PREFACE, p. viii] Line 22: the word "to" is missing in the phrase "advice on how to improve."

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Last modified September 12, 2005.